Commit Graph

1122661 Commits

Author SHA1 Message Date
Christian A. Ehrhardt
1efda38d6f kprobes: Prohibit probes in gate area
The system call gate area counts as kernel text but trying
to install a kprobe in this area fails with an Oops later on.
To fix this explicitly disallow the gate area for kprobes.

Found by syzkaller with the following reproducer:
perf_event_open$cgroup(&(0x7f00000001c0)={0x6, 0x80, 0x0, 0x0, 0x0, 0x0, 0x80ffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext={0x0, 0xffffffffff600000}}, 0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0)

Sample report:
BUG: unable to handle page fault for address: fffffbfff3ac6000
PGD 6dfcb067 P4D 6dfcb067 PUD 6df8f067 PMD 6de4d067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 PID: 21978 Comm: syz-executor.2 Not tainted 6.0.0-rc3-00363-g7726d4c3e60b-dirty #6
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RIP: 0010:__insn_get_emulate_prefix arch/x86/lib/insn.c:91 [inline]
RIP: 0010:insn_get_emulate_prefix arch/x86/lib/insn.c:106 [inline]
RIP: 0010:insn_get_prefixes.part.0+0xa8/0x1110 arch/x86/lib/insn.c:134
Code: 49 be 00 00 00 00 00 fc ff df 48 8b 40 60 48 89 44 24 08 e9 81 00 00 00 e8 e5 4b 39 ff 4c 89 fa 4c 89 f9 48 c1 ea 03 83 e1 07 <42> 0f b6 14 32 38 ca 7f 08 84 d2 0f 85 06 10 00 00 48 89 d8 48 89
RSP: 0018:ffffc900088bf860 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffffffff9b9bebc0 RCX: 0000000000000000
RDX: 1ffffffff3ac6000 RSI: ffffc90002d82000 RDI: ffffc900088bf9e8
RBP: ffffffff9d630001 R08: 0000000000000000 R09: ffffc900088bf9e8
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff9d630000 R14: dffffc0000000000 R15: ffffffff9d630000
FS:  00007f63eef63640(0000) GS:ffff88806d000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff3ac6000 CR3: 0000000029d90005 CR4: 0000000000770ef0
PKRU: 55555554
Call Trace:
 <TASK>
 insn_get_prefixes arch/x86/lib/insn.c:131 [inline]
 insn_get_opcode arch/x86/lib/insn.c:272 [inline]
 insn_get_modrm+0x64a/0x7b0 arch/x86/lib/insn.c:343
 insn_get_sib+0x29a/0x330 arch/x86/lib/insn.c:421
 insn_get_displacement+0x350/0x6b0 arch/x86/lib/insn.c:464
 insn_get_immediate arch/x86/lib/insn.c:632 [inline]
 insn_get_length arch/x86/lib/insn.c:707 [inline]
 insn_decode+0x43a/0x490 arch/x86/lib/insn.c:747
 can_probe+0xfc/0x1d0 arch/x86/kernel/kprobes/core.c:282
 arch_prepare_kprobe+0x79/0x1c0 arch/x86/kernel/kprobes/core.c:739
 prepare_kprobe kernel/kprobes.c:1160 [inline]
 register_kprobe kernel/kprobes.c:1641 [inline]
 register_kprobe+0xb6e/0x1690 kernel/kprobes.c:1603
 __register_trace_kprobe kernel/trace/trace_kprobe.c:509 [inline]
 __register_trace_kprobe+0x26a/0x2d0 kernel/trace/trace_kprobe.c:477
 create_local_trace_kprobe+0x1f7/0x350 kernel/trace/trace_kprobe.c:1833
 perf_kprobe_init+0x18c/0x280 kernel/trace/trace_event_perf.c:271
 perf_kprobe_event_init+0xf8/0x1c0 kernel/events/core.c:9888
 perf_try_init_event+0x12d/0x570 kernel/events/core.c:11261
 perf_init_event kernel/events/core.c:11325 [inline]
 perf_event_alloc.part.0+0xf7f/0x36a0 kernel/events/core.c:11619
 perf_event_alloc kernel/events/core.c:12059 [inline]
 __do_sys_perf_event_open+0x4a8/0x2a00 kernel/events/core.c:12157
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f63ef7efaed
Code: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f63eef63028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f63ef90ff80 RCX: 00007f63ef7efaed
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 00000000200001c0
RBP: 00007f63ef86019c R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000002 R14: 00007f63ef90ff80 R15: 00007f63eef43000
 </TASK>
Modules linked in:
CR2: fffffbfff3ac6000
---[ end trace 0000000000000000 ]---
RIP: 0010:__insn_get_emulate_prefix arch/x86/lib/insn.c:91 [inline]
RIP: 0010:insn_get_emulate_prefix arch/x86/lib/insn.c:106 [inline]
RIP: 0010:insn_get_prefixes.part.0+0xa8/0x1110 arch/x86/lib/insn.c:134
Code: 49 be 00 00 00 00 00 fc ff df 48 8b 40 60 48 89 44 24 08 e9 81 00 00 00 e8 e5 4b 39 ff 4c 89 fa 4c 89 f9 48 c1 ea 03 83 e1 07 <42> 0f b6 14 32 38 ca 7f 08 84 d2 0f 85 06 10 00 00 48 89 d8 48 89
RSP: 0018:ffffc900088bf860 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffffffff9b9bebc0 RCX: 0000000000000000
RDX: 1ffffffff3ac6000 RSI: ffffc90002d82000 RDI: ffffc900088bf9e8
RBP: ffffffff9d630001 R08: 0000000000000000 R09: ffffc900088bf9e8
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff9d630000 R14: dffffc0000000000 R15: ffffffff9d630000
FS:  00007f63eef63640(0000) GS:ffff88806d000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbfff3ac6000 CR3: 0000000029d90005 CR4: 0000000000770ef0
PKRU: 55555554
==================================================================

Link: https://lkml.kernel.org/r/20220907200917.654103-1-lk@c--e.de

cc: "Naveen N. Rao" <naveen.n.rao@linux.ibm.com>
cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
cc: "David S. Miller" <davem@davemloft.net>
Cc: stable@vger.kernel.org
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Christian A. Ehrhardt <lk@c--e.de>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-09-08 17:08:43 -04:00
Xiu Jianfeng
93d71986a6 rv/reactor: add __init/__exit annotations to module init/exit funcs
Add missing __init/__exit annotations to module init/exit funcs.

Link: https://lkml.kernel.org/r/20220906141210.132607-1-xiujianfeng@huawei.com

Fixes: 135b881ea8 ("rv/reactor: Add the printk reactor")
Fixes: e88043c0ac ("rv/reactor: Add the panic reactor")
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Acked-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-09-06 22:26:00 -04:00
Masami Hiramatsu (Google)
cecf8e128e tracing: Fix to check event_mutex is held while accessing trigger list
Since the check_user_trigger() is called outside of RCU
read lock, this list_for_each_entry_rcu() caused a suspicious
RCU usage warning.

 # echo hist:keys=pid > events/sched/sched_stat_runtime/trigger
 # cat events/sched/sched_stat_runtime/trigger
[   43.167032]
[   43.167418] =============================
[   43.167992] WARNING: suspicious RCU usage
[   43.168567] 5.19.0-rc5-00029-g19ebe4651abf #59 Not tainted
[   43.169283] -----------------------------
[   43.169863] kernel/trace/trace_events_trigger.c:145 RCU-list traversed in non-reader section!!
...

However, this file->triggers list is safe when it is accessed
under event_mutex is held.
To fix this warning, adds a lockdep_is_held check to the
list_for_each_entry_rcu().

Link: https://lkml.kernel.org/r/166226474977.223837.1992182913048377113.stgit@devnote2

Cc: stable@vger.kernel.org
Fixes: 7491e2c442 ("tracing: Add a probe that attaches to trace events")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-09-06 22:26:00 -04:00
Yipeng Zou
54c3931957 tracing: hold caller_addr to hardirq_{enable,disable}_ip
Currently, The arguments passing to lockdep_hardirqs_{on,off} was fixed
in CALLER_ADDR0.
The function trace_hardirqs_on_caller should have been intended to use
caller_addr to represent the address that caller wants to be traced.

For example, lockdep log in riscv showing the last {enabled,disabled} at
__trace_hardirqs_{on,off} all the time(if called by):
[   57.853175] hardirqs last  enabled at (2519): __trace_hardirqs_on+0xc/0x14
[   57.853848] hardirqs last disabled at (2520): __trace_hardirqs_off+0xc/0x14

After use trace_hardirqs_xx_caller, we can get more effective information:
[   53.781428] hardirqs last  enabled at (2595): restore_all+0xe/0x66
[   53.782185] hardirqs last disabled at (2596): ret_from_exception+0xa/0x10

Link: https://lkml.kernel.org/r/20220901104515.135162-2-zouyipeng@huawei.com

Cc: stable@vger.kernel.org
Fixes: c3bc8fd637 ("tracing: Centralize preemptirq tracepoints and unify their usage")
Signed-off-by: Yipeng Zou <zouyipeng@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-09-06 22:26:00 -04:00
Alison Schofield
54be550942 tracepoint: Allow trace events in modules with TAINT_TEST
Commit 2852ca7fba ("panic: Taint kernel if tests are run")
introduced a new taint type, TAINT_TEST, to signal that an
in-kernel test module has been loaded.

TAINT_TEST taint type defaults into a 'bad_taint' list for
kernel tracing and blocks the creation of trace events. This
causes a problem for CXL testing where loading the cxl_test
module makes all CXL modules out-of-tree, blocking any trace
events.

Trace events are in development for CXL at the moment and this
issue was found in test with v6.0-rc1.

Link: https://lkml.kernel.org/r/20220829171048.263065-1-alison.schofield@intel.com

Fixes: 2852ca7fba ("panic: Taint kernel if tests are run")
Reported-by: Ira Weiny <ira.weiny@intel.com>
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-09-06 22:26:00 -04:00
Lukas Bulwahn
f72c3a2d34 MAINTAINERS: add scripts/tracing/ to TRACING
The files in scripts/tracing/ belong to the TRACING subsystem.

Add a corresponding file entry for TRACING.

Link: https://lkml.kernel.org/r/20220825115927.20598-1-lukas.bulwahn@gmail.com

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-09-06 22:15:58 -04:00
Daniel Bristot de Oliveira
fa4b9df00a MAINTAINERS: Add Runtime Verification (RV) entry
Add a Runtime Verification (RV) entry in the MAINTAINERS file
with Steven Rostedt and myself as maintainers.

Link: https://lkml.kernel.org/r/b24c13553b6947a8da16d884ca464e4233eb8fb7.1661268579.git.bristot@kernel.org

Cc: Joe Perches <joe@perches.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-09-06 22:15:32 -04:00
Daniel Bristot de Oliveira
baf2c00240 rv/monitors: Make monitor's automata definition static
Monitor's automata definition is only used locally, so make
them static for all existing monitors.

Link: https://lore.kernel.org/all/202208210332.gtHXje45-lkp@intel.com
Link: https://lore.kernel.org/all/202208210358.6HH3OrVs-lkp@intel.com
Link: https://lkml.kernel.org/r/a50e27c3738d6ef809f4201857229fed64799234.1661266564.git.bristot@kernel.org

Fixes: ccc319dcb4 ("rv/monitor: Add the wwnr monitor")
Fixes: 8812d21219 ("rv/monitor: Add the wip monitor skeleton created by dot2k")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-09-06 22:13:25 -04:00
Linus Torvalds
7e18e42e4b Linux 6.0-rc4 2022-09-04 13:10:01 -07:00
Linus Torvalds
5995497296 powerpc fixes for 6.0 #4
- Fix handling of PCI domains in /proc on 32-bit systems using the recently added support
    for numbering buses from zero for each domain.
 
  - A fix and a revert for some changes to use READ/WRITE_ONCE() which caused problems with
    KASAN enabled due to sanitisation calls being introduced in low-level paths that can't
    cope with it.
 
  - Fix build errors on 32-bit caused by the syscall table being misaligned sometimes.
 
  - Two fixes to get IBM Cell native machines booting again, which had bit-rotted while my
    QS22 was temporarily out of action.
 
  - Fix the papr_scm driver to not assume the order of events returned by the hypervisor is
    stable, and a related compile fix.
 
 Thanks to: Aneesh Kumar K.V, Christophe Leroy, Jordan Niethe, Kajol Jain, Masahiro Yamada,
 Nathan Chancellor, Pali Rohár, Vaibhav Jain, Zhouyi Zhou.
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Merge tag 'powerpc-6.0-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - Fix handling of PCI domains in /proc on 32-bit systems using the
   recently added support for numbering buses from zero for each domain.

 - A fix and a revert for some changes to use READ/WRITE_ONCE() which
   caused problems with KASAN enabled due to sanitisation calls being
   introduced in low-level paths that can't cope with it.

 - Fix build errors on 32-bit caused by the syscall table being
   misaligned sometimes.

 - Two fixes to get IBM Cell native machines booting again, which had
   bit-rotted while my QS22 was temporarily out of action.

 - Fix the papr_scm driver to not assume the order of events returned by
   the hypervisor is stable, and a related compile fix.

Thanks to Aneesh Kumar K.V, Christophe Leroy, Jordan Niethe, Kajol Jain,
Masahiro Yamada, Nathan Chancellor, Pali Rohár, Vaibhav Jain, and Zhouyi
Zhou.

* tag 'powerpc-6.0-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/papr_scm: Ensure rc is always initialized in papr_scm_pmu_register()
  Revert "powerpc/irq: Don't open code irq_soft_mask helpers"
  powerpc: Fix hard_irq_disable() with sanitizer
  powerpc/rtas: Fix RTAS MSR[HV] handling for Cell
  Revert "powerpc: Remove unused FW_FEATURE_NATIVE references"
  powerpc: align syscall table for ppc32
  powerpc/pci: Enable PCI domains in /proc when PCI bus numbers are not unique
  powerpc/papr_scm: Fix nvdimm event mappings
2022-09-04 11:33:22 -07:00
Linus Torvalds
685ed983e2 s390:
* PCI interpretation compile fixes
 
 RISC-V:
 
 * Fix unused variable warnings in vcpu_timer.c
 
 * Move extern sbi_ext declarations to a header
 
 x86:
 
 * check validity of argument to KVM_SET_MP_STATE
 
 * use guest's global_ctrl to completely disable guest PEBS
 
 * fix a memory leak on memory allocation failure
 
 * mask off unsupported and unknown bits of IA32_ARCH_CAPABILITIES
 
 * fix build failure with Clang integrated assembler
 
 * fix MSR interception
 
 * Always flush TLBs when enabling dirty logging
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "s390:

   - PCI interpretation compile fixes

  RISC-V:

   - fix unused variable warnings in vcpu_timer.c

   - move extern sbi_ext declarations to a header

  x86:

   - check validity of argument to KVM_SET_MP_STATE

   - use guest's global_ctrl to completely disable guest PEBS

   - fix a memory leak on memory allocation failure

   - mask off unsupported and unknown bits of IA32_ARCH_CAPABILITIES

   - fix build failure with Clang integrated assembler

   - fix MSR interception

   - always flush TLBs when enabling dirty logging"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: check validity of argument to KVM_SET_MP_STATE
  perf/x86/core: Completely disable guest PEBS via guest's global_ctrl
  KVM: x86: fix memoryleak in kvm_arch_vcpu_create()
  KVM: x86: Mask off unsupported and unknown bits of IA32_ARCH_CAPABILITIES
  KVM: s390: pci: Hook to access KVM lowlevel from VFIO
  riscv: kvm: move extern sbi_ext declarations to a header
  riscv: kvm: vcpu_timer: fix unused variable warnings
  KVM: selftests: Fix ambiguous mov in KVM_ASM_SAFE()
  KVM: selftests: Fix KVM_EXCEPTION_MAGIC build with Clang
  KVM: VMX: Heed the 'msr' argument in msr_write_intercepted()
  kvm: x86: mmu: Always flush TLBs when enabling dirty logging
  kvm: x86: mmu: Drop the need_remote_flush() function
2022-09-04 11:27:14 -07:00
Nick Desaulniers
b0839b281c Makefile.extrawarn: re-enable -Wformat for clang; take 2
-Wformat was recently re-enabled for builds with clang, then quickly
re-disabled, due to concerns stemming from the frequency of default
argument promotion related warning instances.

commit 258fafcd06 ("Makefile.extrawarn: re-enable -Wformat for clang")
commit 21f9c8a13b ("Revert "Makefile.extrawarn: re-enable -Wformat for clang"")

ISO WG14 has ratified N2562 to address default argument promotion
explicitly for printf, as part of the upcoming ISO C2X standard.

The behavior of clang was changed in clang-16 to not warn for the cited
cases in all language modes.

Add a version check, so that users of clang-16 now get the full effect
of -Wformat. For older clang versions, re-enable flags under the
-Wformat group that way users still get some useful checks related to
format strings, without noisy default argument promotion warnings. I
intentionally omitted -Wformat-y2k and -Wformat-security from being
re-enabled, which are also part of -Wformat in clang-16.

Link: https://github.com/ClangBuiltLinux/linux/issues/378
Link: https://github.com/llvm/llvm-project/issues/57102
Link: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2562.pdf
Suggested-by: Justin Stitt <jstitt007@gmail.com>
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Suggested-by: Youngmin Nam <youngmin.nam@samsung.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-09-04 11:15:50 -07:00
Linus Torvalds
7726d4c3e6 gpio fixes for v6.0-rc4
- MAINTAINERS update
 - fix resource leaks in gpio-mockup and gpio-pxa
 - add missing locking in gpio-pca953x
 - use 32-bit I/O in gpio-realtek-otto
 - make irq_chip structures immutable in four more drivers
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Merge tag 'gpio-fixes-for-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:
 "A a set of fixes from the GPIO subsystem.

  Most are small driver fixes except the realtek-otto driver patch which
  is pretty big but addresses a significant flaw that can cause the CPU
  to stay infinitely busy on uncleared ISR on some platforms.

  Summary:
   - MAINTAINERS update
   - fix resource leaks in gpio-mockup and gpio-pxa
   - add missing locking in gpio-pca953x
   - use 32-bit I/O in gpio-realtek-otto
   - make irq_chip structures immutable in four more drivers"

* tag 'gpio-fixes-for-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: ws16c48: Make irq_chip immutable
  gpio: 104-idio-16: Make irq_chip immutable
  gpio: 104-idi-48: Make irq_chip immutable
  gpio: 104-dio-48e: Make irq_chip immutable
  gpio: realtek-otto: switch to 32-bit I/O
  gpio: pca953x: Add mutex_lock for regcache sync in PM
  gpio: mockup: remove gpio debugfs when remove device
  gpio: pxa: use devres for the clock struct
  MAINTAINERS: rectify entry for XILINX GPIO DRIVER
2022-09-03 21:27:27 -07:00
William Breathitt Gray
6890381720 gpio: ws16c48: Make irq_chip immutable
Kernel warns about mutable irq_chips:

    "not an immutable chip, please consider fixing!"

Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
new helper functions, and call the appropriate gpiolib functions.

Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2022-09-03 22:56:34 +02:00
William Breathitt Gray
410a5041aa gpio: 104-idio-16: Make irq_chip immutable
Kernel warns about mutable irq_chips:

    "not an immutable chip, please consider fixing!"

Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
new helper functions, and call the appropriate gpiolib functions.

Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2022-09-03 22:56:26 +02:00
William Breathitt Gray
fa1329f9e4 gpio: 104-idi-48: Make irq_chip immutable
Kernel warns about mutable irq_chips:

    "not an immutable chip, please consider fixing!"

Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
new helper functions, and call the appropriate gpiolib functions.

Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2022-09-03 22:56:17 +02:00
William Breathitt Gray
35f0aa7727 gpio: 104-dio-48e: Make irq_chip immutable
Kernel warns about mutable irq_chips:

    "not an immutable chip, please consider fixing!"

Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
new helper functions, and call the appropriate gpiolib functions.

Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2022-09-03 22:56:10 +02:00
Linus Torvalds
65eea2c060 xen: branch for v6.0-rc4
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Merge tag 'for-linus-6.0-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:

 - a minor fix for the Xen grant driver

 - a small series fixing a recently introduced problem in the Xen
   blkfront/blkback drivers with negotiation of feature usage

* tag 'for-linus-6.0-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/grants: prevent integer overflow in gnttab_dma_alloc_pages()
  xen-blkfront: Cache feature_persistent value before advertisement
  xen-blkfront: Advertise feature-persistent as user requested
  xen-blkback: Advertise feature-persistent as user requested
2022-09-03 13:23:11 -07:00
Linus Torvalds
f0c5f7ea81 LoongArch fixes for v6.0-rc4
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Merge tag 'loongarch-fixes-6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch fixes from Huacai Chen:
 "Fix several build errors or warnings, cleanup some code, and adjust
  arch_do_signal_or_restart() to adapt generic entry"

* tag 'loongarch-fixes-6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  LoongArch: mm: Remove the unneeded result variable
  LoongArch: Fix arch_remove_memory() undefined build error
  LoongArch: Fix section mismatch due to acpi_os_ioremap()
  LoongArch: Improve dump_tlb() output messages
  LoongArch: Adjust arch_do_signal_or_restart() to adapt generic entry
  LoongArch: Avoid orphan input sections
2022-09-03 13:21:01 -07:00
Linus Torvalds
cda9a8486c s390 updates for 6.0-rc4
- Update defconfigs.
 
 - Fix linker script to align nospec tables correctly to avoid potentially
   unbootable kernel with some config options.
 
 - Fix alignment check in prepare_hugepage_range() for 2GB hugepages to avoid
   BUG in __unmap_hugepage_range() for unaligned mappings later.
 
 - Remove useless hugepage address alignment in hugetlb faults handling.
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Merge tag 's390-6.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Vasily Gorbik:

 - Update defconfigs

 - Fix linker script to align nospec tables correctly to avoid
   potentially unbootable kernel with some config options

 - Fix alignment check in prepare_hugepage_range() for 2GB hugepages to
   avoid BUG in __unmap_hugepage_range() for unaligned mappings later

 - Remove useless hugepage address alignment in hugetlb fault handling

* tag 's390-6.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/hugetlb: fix prepare_hugepage_range() check for 2 GB hugepages
  s390: update defconfigs
  s390: fix nospec table alignments
  s390/mm: remove useless hugepage address alignment
2022-09-03 13:17:33 -07:00
Linus Torvalds
6433fe06f6 Input updates for v6.0-rc3
- GT1158 ID added to Goodix touchscreen driver
 
 - Boeder Force Feedback Wheel USB added to iforce joystick driver
 
 - fixup for iforce driver to avoid hangups
 
 - fix autoloading of rk805-pwrkey driver.
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Merge tag 'input-for-v6.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:

 - GT1158 ID added to Goodix touchscreen driver

 - Boeder Force Feedback Wheel USB added to iforce joystick driver

 - fixup for iforce driver to avoid hangups

 - fix autoloading of rk805-pwrkey driver.

* tag 'input-for-v6.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: iforce - add support for Boeder Force Feedback Wheel
  Input: iforce - wake up after clearing IFORCE_XMIT_RUNNING flag
  Input: goodix - add compatible string for GT1158
  MAINTAINERS: add include/dt-bindings/input to INPUT DRIVERS
  Input: rk805-pwrkey - fix module autoloading
  Input: goodix - add support for GT1158
  dt-bindings: input: touchscreen: add compatible string for Goodix GT1158
2022-09-03 13:09:46 -07:00
Linus Torvalds
42cf58c272 TTY/Serial driver fixes for 6.0-rc4
Here are some small tty/serial/vt driver fixes for 6.0-rc4 that resolve
 a number of reported issues:
   - n_gsm fixups for previous changes that caused problems
   - much-reported serdev crash fix that showed up in 6.0-rc1
   - vt font selection bugfix
   - kerneldoc build warning fixes
   - other tiny serial core fixes
 
 All of these have been in linux-next for a while with no reported
 problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver fixes from Greg KH:
 "Here are some small tty/serial/vt driver fixes for 6.0-rc4 that
  resolve a number of reported issues:

   - n_gsm fixups for previous changes that caused problems

   - much-reported serdev crash fix that showed up in 6.0-rc1

   - vt font selection bugfix

   - kerneldoc build warning fixes

   - other tiny serial core fixes

  All of these have been in linux-next for a while with no reported
  problems"

* tag 'tty-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: n_gsm: avoid call of sleeping functions from atomic context
  tty: n_gsm: replace kicktimer with delayed_work
  tty: n_gsm: initialize more members at gsm_alloc_mux()
  tty: n_gsm: add sanity check for gsm->receive in gsm_receive_buf()
  tty: serial: atmel: Preserve previous USART mode if RS485 disabled
  tty: serial: lpuart: disable flow control while waiting for the transmit engine to complete
  tty: Fix lookahead_buf crash with serdev
  serial: fsl_lpuart: RS485 RTS polariy is inverse
  vt: Clear selection before changing the font
  serial: document start_rx member at struct uart_ops
2022-09-03 10:34:02 -07:00
Linus Torvalds
c53b3dcb99 Staging driver fixes for 6.0-rc4
Here are 3 small staging driver fixes for 6.0-rc4 that resolve some
 reported problems and add some a device id:
   - new device id for r8188eu driver
   - use-after-free bugfixes for the rtl8712 driver
   - fix up firmware dependency problem for the r8188eu driver
 
 All of these have been in linux-next for a while with no reported
 problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging driver fixes from Greg KH:
 "Here are three small staging driver fixes for 6.0-rc4 that resolve
  some reported problems and add some a device id:

   - new device id for r8188eu driver

   - use-after-free bugfixes for the rtl8712 driver

   - fix up firmware dependency problem for the r8188eu driver

  All of these have been in linux-next for a while with no reported
  problems"

* tag 'staging-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: rtl8712: fix use after free bugs
  staging: r8188eu: Add Rosewill USB-N150 Nano to device tables
  staging: r8188eu: add firmware dependency
2022-09-03 10:32:17 -07:00
Linus Torvalds
9a61442cba Here's a collection of primarily clk driver fixes, with a couple fixes
to the core framework. We had to revert out a commit that affected boot
 on some devices that have the CLK_OPS_PARENT_ENABLE flag set. It isn't
 critical to have that fix so we'll try again next time.
 
 Driver side fixes include:
 
  - Plug an of node refcount bug in the TI clk driver
 
  - Fix the error handling in the raspberry pi firmware get_rate
    so that errors don't look like valid frequencies
 
  - Avoid going out of bounds in the raspberry pi driver too if the
    video firmware returns something we're not expecting
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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull clk fixes from Stephen Boyd:
 "Here's a collection of primarily clk driver fixes, with a couple fixes
  to the core framework.

  We had to revert out a commit that affected boot on some devices that
  have the CLK_OPS_PARENT_ENABLE flag set. It isn't critical to have
  that fix so we'll try again next time.

  Driver side fixes include:

   - Plug an OF-node refcount bug in the TI clk driver

   - Fix the error handling in the raspberry pi firmware get_rate so
     that errors don't look like valid frequencies

   - Avoid going out of bounds in the raspberry pi driver too if the
     video firmware returns something we're not expecting"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  Revert "clk: core: Honor CLK_OPS_PARENT_ENABLE for clk gate ops"
  clk: bcm: rpi: Show clock id limit in error case
  clk: bcm: rpi: Add missing newline
  clk: bcm: rpi: Prevent out-of-bounds access
  clk: bcm: rpi: Fix error handling of raspberrypi_fw_get_rate
  clk: core: Fix runtime PM sequence in clk_core_unprepare()
  clk: core: Honor CLK_OPS_PARENT_ENABLE for clk gate ops
  clk: ti: Fix missing of_node_get() ti_find_clock_provider()
2022-09-03 10:27:25 -07:00
Linus Torvalds
777464261d hwmon fixes for v6.0-rc4
- Fix out of bounds access in gpio-fan driver
 
 - Fix VOUT margin caching in PMBus core
 
 - Avoid error message after -EPROBE_DEFER from devm_regulator_register()
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Merge tag 'hwmon-for-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - Fix out of bounds access in gpio-fan driver

 - Fix VOUT margin caching in PMBus core

 - Avoid error message after -EPROBE_DEFER from devm_regulator_register()

* tag 'hwmon-for-v6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (gpio-fan) Fix array out of bounds access
  hwmon: (pmbus) Fix vout margin caching
  hwmon: (pmbus) Use dev_err_probe() to filter -EPROBE_DEFER error messages
2022-09-03 10:24:30 -07:00
Steven Price
8782fb61cc mm: pagewalk: Fix race between unmap and page walker
The mmap lock protects the page walker from changes to the page tables
during the walk.  However a read lock is insufficient to protect those
areas which don't have a VMA as munmap() detaches the VMAs before
downgrading to a read lock and actually tearing down PTEs/page tables.

For users of walk_page_range() the solution is to simply call pte_hole()
immediately without checking the actual page tables when a VMA is not
present. We now never call __walk_page_range() without a valid vma.

For walk_page_range_novma() the locking requirements are tightened to
require the mmap write lock to be taken, and then walking the pgd
directly with 'no_vma' set.

This in turn means that all page walkers either have a valid vma, or
it's that special 'novma' case for page table debugging.  As a result,
all the odd '(!walk->vma && !walk->no_vma)' tests can be removed.

Fixes: dd2283f260 ("mm: mmap: zap pages with read mmap_sem in munmap")
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-09-03 10:13:13 -07:00
ye xingchen
ac9284db6b LoongArch: mm: Remove the unneeded result variable
Return the value pa_to_nid() directly instead of storing it in another
redundant variable.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-09-03 18:01:27 +08:00
Yupeng Li
1a470ce4e9 LoongArch: Fix arch_remove_memory() undefined build error
The kernel build error when unslected CONFIG_MEMORY_HOTREMOVE because
arch_remove_memory() is needed by mm/memory_hotplug.c but undefined.

Some build error messages like:

 LD      vmlinux.o
 MODPOST vmlinux.symvers
 MODINFO modules.builtin.modinfo
 GEN     modules.builtin
 LD      .tmp_vmlinux.kallsyms1
loongarch64-linux-gnu-ld: mm/memory_hotplug.o: in function `.L242':
memory_hotplug.c:(.ref.text+0x930): undefined reference to `arch_remove_memory'
make: *** [Makefile:1169:vmlinux] 错误 1

Removed CONFIG_MEMORY_HOTREMOVE requirement and rearrange the file refer
to the definitions of other platform architectures.

Signed-off-by: Yupeng Li <liyupeng@zbhlos.com>
Signed-off-by: Caicai <caizp2008@163.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-09-03 18:01:27 +08:00
Huacai Chen
e0fba87c85 LoongArch: Fix section mismatch due to acpi_os_ioremap()
Now acpi_os_ioremap() is marked with __init because it calls memblock_
is_memory() which is also marked with __init in the !ARCH_KEEP_MEMBLOCK
case. However, acpi_os_ioremap() is called by ordinary functions such
as acpi_os_{read, write}_memory() and causes section mismatch warnings:

WARNING: modpost: vmlinux.o: section mismatch in reference: acpi_os_read_memory (section: .text) -> acpi_os_ioremap (section: .init.text)
WARNING: modpost: vmlinux.o: section mismatch in reference: acpi_os_write_memory (section: .text) -> acpi_os_ioremap (section: .init.text)

Fix these warnings by selecting ARCH_KEEP_MEMBLOCK unconditionally and
removing the __init modifier of acpi_os_ioremap(). This can also give a
chance to track "memory" and "reserved" memblocks after early boot.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-09-03 18:01:27 +08:00
Huacai Chen
ad6846196a LoongArch: Improve dump_tlb() output messages
1, Use nr/nx to replace ri/xi;
2, Add 0x prefix for hexadecimal data.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-09-03 18:01:27 +08:00
Huacai Chen
0163005374 LoongArch: Adjust arch_do_signal_or_restart() to adapt generic entry
Commit 8ba62d3794 ("task_work: Call tracehook_notify_signal from
get_signal on all architectures") adjust arch_do_signal_or_restart() for
all architectures. LoongArch hasn't been upstream yet at that time and
can be still built successfully without adjustment because this function
has a weak version with the correct prototype. It is obviously that we
should convert LoongArch to use new API, otherwise some signal handlings
will be lost.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-09-03 18:01:27 +08:00
Ard Biesheuvel
1429cfde90 LoongArch: Avoid orphan input sections
Ensure that all input sections are listed explicitly in the linker
script, and issue a warning otherwise. This ensures that the binary
image matches the PE/COFF and other image metadata exactly, which is
important for things like code signing.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-09-03 18:01:27 +08:00
Linus Torvalds
d895ec7938 block-6.0-2022-09-02
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Merge tag 'block-6.0-2022-09-02' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - NVMe pull request via Christoph:
     - error handling fix for the new auth code (Hannes Reinecke)
     - fix unhandled tcp states in nvmet_tcp_state_change (Maurizio
       Lombardi)
     - add NVME_QUIRK_BOGUS_NID for Lexar NM610 (Shyamin Ayesh)

 - Add documentation for the ublk driver merged in this merge window
   (Ming)

* tag 'block-6.0-2022-09-02' of git://git.kernel.dk/linux-block:
  Documentation: document ublk
  nvmet-tcp: fix unhandled tcp states in nvmet_tcp_state_change()
  nvmet-auth: add missing goto in nvmet_setup_auth()
  nvme-pci: add NVME_QUIRK_BOGUS_NID for Lexar NM610
2022-09-02 16:44:30 -07:00
Linus Torvalds
cec53f4c8d io_uring-6.0-2022-09-02
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Merge tag 'io_uring-6.0-2022-09-02' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:

 - A single fix for over-eager retries for networking (Pavel)

 - Revert the notification slot support for zerocopy sends.

   It turns out that even after more than a year or development and
   testing, there's not full agreement on whether just using plain
   ordered notifications is Good Enough to avoid the complexity of using
   the notifications slots. Because of that, we decided that it's best
   left to a future final decision.

   We can always bring back this feature, but we can't really change it
   or remove it once we've released 6.0 with it enabled. The reverts
   leave the usual CQE notifications as the primary interface for
   knowing when data was sent, and when it was acked. (Pavel)

* tag 'io_uring-6.0-2022-09-02' of git://git.kernel.dk/linux-block:
  selftests/net: return back io_uring zc send tests
  io_uring/net: simplify zerocopy send user API
  io_uring/notif: remove notif registration
  Revert "io_uring: rename IORING_OP_FILES_UPDATE"
  Revert "io_uring: add zc notification flush requests"
  selftests/net: temporarily disable io_uring zc test
  io_uring/net: fix overexcessive retries
2022-09-02 16:37:01 -07:00
Linus Torvalds
1551f8f21e 5 cifs/smb3 fixes, all also for stable
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Merge tag '6.0-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Five fixes, all also marked for stable:

   - fixes for collapse range and insert range (also fixes xfstest
     generic/031)

   - memory leak fix"

* tag '6.0-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: fix small mempool leak in SMB2_negotiate()
  smb3: use filemap_write_and_wait_range instead of filemap_write_and_wait
  smb3: fix temporary data corruption in insert range
  smb3: fix temporary data corruption in collapse range
  smb3: Move the flush out of smb2_copychunk_range() into its callers
2022-09-02 16:20:24 -07:00
Linus Torvalds
0c95f02269 Landlock fix for v6.0-rc4
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Merge tag 'landlock-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux

Pull landlock fix from Mickaël Salaün:
 "This fixes a mis-handling of the LANDLOCK_ACCESS_FS_REFER right when
  multiple rulesets/domains are stacked.

  The expected behaviour was that an additional ruleset can only
  restrict the set of permitted operations, but in this particular case,
  it was potentially possible to re-gain the LANDLOCK_ACCESS_FS_REFER
  right"

* tag 'landlock-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
  landlock: Fix file reparenting without explicit LANDLOCK_ACCESS_FS_REFER
2022-09-02 15:24:08 -07:00
Linus Torvalds
b307e70457 MMC core:
- Fix workaround for SD UHS-I voltage switch
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Merge tag 'mmc-v6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:

 - Fix workaround for SD UHS-I voltage switch

* tag 'mmc-v6.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: core: Fix inconsistent sd3_bus_mode at UHS-I SD voltage switch failure
  mmc: core: Fix UHS-I SD 1.8V workaround branch
2022-09-02 15:03:12 -07:00
Linus Torvalds
1e8e515edd drm fixes for 6.0-rc3
dma-buf/dma-resv:
 - Fence-handling fix
 
 i915:
 - GVT fixes including fix for a CommetLake regression in mmio table
   and misc doc and typo fixes
 - Fix CCS handling
 - Fix for guc requests after reset
 - Display DSI related fixes
 - Display backlight related fixes
 - Fix for a null pointer dereference
 - HDMI related quirk for ECS Liva Q2 with GLK graphics
 - Skip wm/ddb readout for disabled pipes
 
 amdgpu:
 - FRU error message fix
 - MES 11 updates
 - DCN 3.2.x fixes
 - DCN 3.1.4 fixes
 - Fix possible use after free in CS IOCTL
 - SMU 13.0.x fixes
 - Fix iolink reporting on devices with direct connections to CPU
 - GFX10 tap delay firmware fixes
 
 msm:
 - Fix for inconsistent indenting in function msm_dsi_dphy_timing_calc_v3.
 - Fix to make eDP the first connector in the connected list.
 - Fix to populate intf_cfg correctly before calling reset_intf_cfg().
 - Specify the correct number of DSI regulators for SDM660.
 - Specify the correct number of DSI regulators for MSM8996.
 - Fix for removing DP_RECOVERED_CLOCK_OUT_EN bit for tps4 link training
 - Fix probe-deferral crash in gpu devfreq
 - Fix gpu debugfs deadlock
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Merge tag 'drm-fixes-2022-09-02' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Regular fixes pull. One core dma-buf fix, then two weeks of i915
  fixes, a lot of amdgpu fixes mostly for new IP, and a bunch of msm
  fixes, mostly modesetting ones.

  Nothing seems too bad at this point.

  dma-buf/dma-resv:
   - Fence-handling fix

  i915:
   - GVT fixes including fix for a CommetLake regression in mmio table
     and misc doc and typo fixes
   - Fix CCS handling
   - Fix for guc requests after reset
   - Display DSI related fixes
   - Display backlight related fixes
   - Fix for a null pointer dereference
   - HDMI related quirk for ECS Liva Q2 with GLK graphics
   - Skip wm/ddb readout for disabled pipes

  amdgpu:
   - FRU error message fix
   - MES 11 updates
   - DCN 3.2.x fixes
   - DCN 3.1.4 fixes
   - Fix possible use after free in CS IOCTL
   - SMU 13.0.x fixes
   - Fix iolink reporting on devices with direct connections to CPU
   - GFX10 tap delay firmware fixes

  msm:
   - Fix for inconsistent indenting in msm_dsi_dphy_timing_calc_v3().
   - Fix to make eDP the first connector in the connected list.
   - Fix to populate intf_cfg correctly before calling reset_intf_cfg().
   - Specify the correct number of DSI regulators for SDM660.
   - Specify the correct number of DSI regulators for MSM8996.
   - Fix for removing DP_RECOVERED_CLOCK_OUT_EN bit for tps4 link training
   - Fix probe-deferral crash in gpu devfreq
   - Fix gpu debugfs deadlock"

* tag 'drm-fixes-2022-09-02' of git://anongit.freedesktop.org/drm/drm: (51 commits)
  drm/amd/amdgpu: skip ucode loading if ucode_size == 0
  drm/amdgpu: only init tap_delay ucode when it's included in ucode binary
  drm/amd/display: Fix black flash when switching from ODM2to1 to ODMBypass
  drm/amd/display: Fix check for stream and plane
  drm/amd/display: Re-initialize viewport after pipe merge
  drm/amd/display: Use correct plane for CAB cursor size allocation
  drm/amdgpu: ensure no PCIe peer access for CPU XGMI iolinks
  drm/amd/pm: bump SMU 13.0.0 driver_if header version
  drm/amd/pm: use vbios carried pptable for all SMU13.0.7 SKUs
  drm/amd/pm: use vbios carried pptable for those supported SKUs
  drm/amd/display: fix wrong register access
  drm/amd/display: use actual cursor size instead of max for CAB allocation
  drm/amd/display: disable display fresh from MALL on an edge case for DCN321
  drm/amd/display: Fix CAB cursor size allocation for DCN32/321
  drm/amd/display: Missing HPO instance added
  drm/amd/display: set dig fifo read start level to 7 before dig fifo reset
  drm/amdgpu: Fix use-after-free in amdgpu_cs_ioctl
  drm/amd/display: Fix OTG H timing reset for dcn314
  drm/amd/display: Fix DCN32 DPSTREAMCLK_CNTL programming
  drm/amdgpu: Update mes_v11_api_def.h
  ...
2022-09-02 14:56:09 -07:00
Linus Torvalds
0b3acd1cc0 Driver core fixes for 6.0-rc4
Here are some small driver core fixes for some oft-reported problems in
 6.0-rc1.  They include:
   - a bunch of reverts to handle driver_deferred_probe_check_state()
     problems that were part of the 6.0-rc1 merge.
   - firmware_loader bugfixes now that the code is being properly tested
     and used by others
   - arch_topology fix
   - deferred driver probe bugfix to solve a long-suffering amba bus
     problem that many people have reported.
 
 All of these have been in linux-next for a while with no reported
 problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are some small driver core fixes for some oft-reported problems
  in 6.0-rc1.  They include:

   - a bunch of reverts to handle driver_deferred_probe_check_state()
     problems that were part of the 6.0-rc1 merge.

   - firmware_loader bugfixes now that the code is being properly tested
     and used by others

   - arch_topology fix

   - deferred driver probe bugfix to solve a long-suffering amba bus
     problem that many people have reported.

  All of these have been in linux-next for a while with no reported
  problems"

* tag 'driver-core-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  firmware_loader: Fix memory leak in firmware upload
  firmware_loader: Fix use-after-free during unregister
  arch_topology: Silence early cacheinfo errors when non-existent
  driver core: Don't probe devices after bus_type.match() probe deferral
  Revert "iommu/of: Delete usage of driver_deferred_probe_check_state()"
  Revert "PM: domains: Delete usage of driver_deferred_probe_check_state()"
  Revert "net: mdio: Delete usage of driver_deferred_probe_check_state()"
  Revert "driver core: Delete driver_deferred_probe_check_state()"
2022-09-02 10:55:23 -07:00
Linus Torvalds
ffb384c269 Char/Misc driver fixes for 6.0-rc4
Here are some small char/misc and other driver fixes for 6.0-rc4.
 
 Included in here are:
   - binder fixes for previous fixes, and a few more fixes uncovered by
     them.
   - iio driver fixes
   - soundwire driver fixes
   - fastrpc driver fixes for memory corruption on some hardware
   - peci driver fix
   - mhi driver fix
 
 All of these have been in linux-next with no reported problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some small char/misc and other driver fixes for 6.0-rc4.

  Included in here are:

   - binder fixes for previous fixes, and a few more fixes uncovered by
     them.

   - iio driver fixes

   - soundwire driver fixes

   - fastrpc driver fixes for memory corruption on some hardware

   - peci driver fix

   - mhi driver fix

  All of these have been in linux-next with no reported problems"

* tag 'char-misc-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  binder: fix alloc->vma_vm_mm null-ptr dereference
  misc: fastrpc: increase maximum session count
  misc: fastrpc: fix memory corruption on open
  misc: fastrpc: fix memory corruption on probe
  soundwire: qcom: fix device status array range
  bus: mhi: host: Fix up null pointer access in mhi_irq_handler
  soundwire: qcom: remove duplicate reset control get
  iio: light: cm32181: make cm32181_pm_ops static
  iio: ad7292: Prevent regulator double disable
  dt-bindings: iio: gyroscope: bosch,bmg160: correct number of pins
  iio: adc: mcp3911: use correct formula for AD conversion
  iio: adc: mcp3911: correct "microchip,device-addr" property
  Revert "binder_alloc: Add missing mmap_lock calls when using the VMA"
  binder_alloc: Add missing mmap_lock calls when using the VMA
  binder: fix UAF of ref->proc caused by race condition
  iio: light: cm3605: Fix an error handling path in cm3605_probe()
  iio: adc: mcp3911: make use of the sign bit
  peci: cpu: Fix use-after-free in adev_release()
  peci: aspeed: fix error check return value of platform_get_irq()
2022-09-02 10:50:08 -07:00
Linus Torvalds
fd59585c42 USB/Thunderbolt driver fixes for 6.0-rc4
Here are a lot of small USB and Thunderbolt driver fixes for 6.0-rc4 for
 reported problems.  Included in here are:
   - new usb-serial driver ids
   - dwc3 driver bugfixes for reported problems with 6.0-rc1
   - new device quirks, and reverts of some quirks that were incorrect
   - gadget driver bugfixes for reported problems
   - USB host controller bugfixes (xhci and others)
   - other small USB fixes, details in the shortlog
   - small thunderbolt driver fixes
 
 All of these have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB/Thunderbolt driver fixes from Greg KH:
 "Here are a lot of small USB and Thunderbolt driver fixes for 6.0-rc4
  for reported problems. Included in here are:

   - new usb-serial driver ids

   - dwc3 driver bugfixes for reported problems with 6.0-rc1

   - new device quirks, and reverts of some quirks that were incorrect

   - gadget driver bugfixes for reported problems

   - USB host controller bugfixes (xhci and others)

   - other small USB fixes, details in the shortlog

   - small thunderbolt driver fixes

  All of these have been in linux-next with no reported issues"

* tag 'usb-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (51 commits)
  Revert "usb: gadget: udc-xilinx: replace memcpy with memcpy_toio"
  usb: storage: Add ASUS <0x0b05:0x1932> to IGNORE_UAS
  USB: serial: ch341: fix disabled rx timer on older devices
  USB: serial: ch341: fix lost character on LCR updates
  USB: serial: cp210x: add Decagon UCA device id
  Revert "usb: add quirks for Lenovo OneLink+ Dock"
  usb: cdns3: fix issue with rearming ISO OUT endpoint
  usb: cdns3: fix incorrect handling TRB_SMM flag for ISOC transfer
  usb: gadget: mass_storage: Fix cdrom data transfers on MAC-OS
  media: mceusb: Use new usb_control_msg_*() routines
  USB: core: Prevent nested device-reset calls
  USB: gadget: Fix obscure lockdep violation for udc_mutex
  usb: dwc2: fix wrong order of phy_power_on and phy_init
  usb: gadget: udc-xilinx: replace memcpy with memcpy_toio
  usb: typec: Remove retimers properly
  usb: dwc3: disable USB core PHY management
  usb: add quirks for Lenovo OneLink+ Dock
  USB: serial: option: add support for Cinterion MV32-WA/WB RmNet mode
  USB: serial: ftdi_sio: add Omron CS1W-CIF31 device id
  USB: serial: option: add Quectel EM060K modem
  ...
2022-09-02 10:43:46 -07:00
Linus Torvalds
1a2f6a3722 platform-drivers-x86 for v6.0-2
Various small fixes and hardware-id additions.
 
 The following is an automated git shortlog grouped by driver:
 
 acer-wmi:
  -  Acer Aspire One AOD270/Packard Bell Dot keymap fixes
 
 asus-wmi:
  -  Increase FAN_CURVE_BUF_LEN to 32
  -  Fix the name of the mic-mute LED classdev
 
 p2sb:
  -  Fix UAF when caller uses resource name
 
 platform/mellanox:
  -  Remove redundant 'NULL' check
  -  Remove unnecessary code
  -  mlxreg-lc: Fix locking issue
  -  mlxreg-lc: Fix coverity warning
 
 platform/surface:
  -  aggregator_registry: Add HID devices for sensors and UCSI client to SP8
  -  aggregator_registry: Rename HID device nodes based on new findings
  -  aggregator_registry: Rename HID device nodes based on their function
  -  aggregator_registry: Add support for Surface Laptop Go 2
 
 pmc_atom:
  -  Fix SLP_TYPx bitfield mask
 
 thinkpad_acpi:
  -  Explicitly set to balanced mode on startup
 
 x86-android-tablets:
  -  Fix broken touchscreen on Chuwi Hi8 with Windows BIOS
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Merge tag 'platform-drivers-x86-v6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver fixes from Hans de Goede:
 "Various small fixes and hardware-id additions"

* tag 'platform-drivers-x86-v6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
  platform/x86: p2sb: Fix UAF when caller uses resource name
  platform/x86: asus-wmi: Increase FAN_CURVE_BUF_LEN to 32
  platform/mellanox: Remove redundant 'NULL' check
  platform/mellanox: Remove unnecessary code
  platform/mellanox: mlxreg-lc: Fix locking issue
  platform/mellanox: mlxreg-lc: Fix coverity warning
  platform/x86: acer-wmi: Acer Aspire One AOD270/Packard Bell Dot keymap fixes
  platform/x86: thinkpad_acpi: Explicitly set to balanced mode on startup
  platform/x86: asus-wmi: Fix the name of the mic-mute LED classdev
  platform/surface: aggregator_registry: Add HID devices for sensors and UCSI client to SP8
  platform/surface: aggregator_registry: Rename HID device nodes based on new findings
  platform/surface: aggregator_registry: Rename HID device nodes based on their function
  platform/surface: aggregator_registry: Add support for Surface Laptop Go 2
  platform/x86: x86-android-tablets: Fix broken touchscreen on Chuwi Hi8 with Windows BIOS
  platform/x86: pmc_atom: Fix SLP_TYPx bitfield mask
2022-09-02 10:35:51 -07:00
Linus Torvalds
cf3488fa25 arm64 fixes for -rc4
- Fix two boot issues caused by the recent head.S rework when !KASLR
 
 - Fix calculation of crashkernel memory reservation
 
 - Fix bogus error check in PMU IRQ probing code
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "It's a lot smaller than last week, with the star of the show being a
  couple of fixes to head.S addressing a boot regression introduced by
  the recent overhaul of that code in non-default configurations (i.e.
  KASLR disabled).

  The first of those two resolves the issue reported (and bisected) by
  Mikulus in the wait_on_bit() thread.

  Summary:

   - Fix two boot issues caused by the recent head.S rework when !KASLR

   - Fix calculation of crashkernel memory reservation

   - Fix bogus error check in PMU IRQ probing code"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: mm: Reserve enough pages for the initial ID map
  perf/arm_pmu_platform: fix tests for platform_get_irq() failure
  arm64: head: Ignore bogus KASLR displacement on non-relocatable kernels
  arm64/kexec: Fix missing extra range for crashkres_low.
2022-09-02 10:32:30 -07:00
Ming Lei
7a3d2225f1 Documentation: document ublk
Add documentation for ublk subsystem. It was supposed to be documented when
merging the driver, but missing at that time.

Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Richard W.M. Jones <rjones@redhat.com>
Cc: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: ZiyangZhang <ZiyangZhang@linux.alibaba.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
[axboe: correct MAINTAINERS addition]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-09-02 09:31:15 -06:00
Mickaël Salaün
55e55920bb
landlock: Fix file reparenting without explicit LANDLOCK_ACCESS_FS_REFER
This change fixes a mis-handling of the LANDLOCK_ACCESS_FS_REFER right
when multiple rulesets/domains are stacked. The expected behaviour was
that an additional ruleset can only restrict the set of permitted
operations, but in this particular case, it was potentially possible to
re-gain the LANDLOCK_ACCESS_FS_REFER right.

With the introduction of LANDLOCK_ACCESS_FS_REFER, we added the first
globally denied-by-default access right.  Indeed, this lifted an initial
Landlock limitation to rename and link files, which was initially always
denied when the source or the destination were different directories.

This led to an inconsistent backward compatibility behavior which was
only taken into account if no domain layer were using the new
LANDLOCK_ACCESS_FS_REFER right. However, when restricting a thread with
a new ruleset handling LANDLOCK_ACCESS_FS_REFER, all inherited parent
rulesets/layers not explicitly handling LANDLOCK_ACCESS_FS_REFER would
behave as if they were handling this access right and with all their
rules allowing it. This means that renaming and linking files could
became allowed by these parent layers, but all the other required
accesses must also be granted: all layers must allow file removal or
creation, and renaming and linking operations cannot lead to privilege
escalation according to the Landlock policy.  See detailed explanation
in commit b91c3e4ea7 ("landlock: Add support for file reparenting with
LANDLOCK_ACCESS_FS_REFER").

To say it another way, this bug may lift the renaming and linking
limitations of the initial Landlock version, and a same ruleset can
enforce different restrictions depending on previous or next enforced
ruleset (i.e. inconsistent behavior). The LANDLOCK_ACCESS_FS_REFER right
cannot give access to data not already allowed, but this doesn't follow
the contract of the first Landlock ABI. This fix puts back the
limitation for sandboxes that didn't opt-in for this additional right.

For instance, if a first ruleset allows LANDLOCK_ACCESS_FS_MAKE_REG on
/dst and LANDLOCK_ACCESS_FS_REMOVE_FILE on /src, renaming /src/file to
/dst/file is denied. However, without this fix, stacking a new ruleset
which allows LANDLOCK_ACCESS_FS_REFER on / would now permit the
sandboxed thread to rename /src/file to /dst/file .

This change fixes the (absolute) rule access rights, which now always
forbid LANDLOCK_ACCESS_FS_REFER except when it is explicitly allowed
when creating a rule.

Making all domain handle LANDLOCK_ACCESS_FS_REFER was an initial
approach but there is two downsides:
* it makes the code more complex because we still want to check that a
  rule allowing LANDLOCK_ACCESS_FS_REFER is legitimate according to the
  ruleset's handled access rights (i.e. ABI v1 != ABI v2);
* it would not allow to identify if the user created a ruleset
  explicitly handling LANDLOCK_ACCESS_FS_REFER or not, which will be an
  issue to audit Landlock.

Instead, this change adds an ACCESS_INITIALLY_DENIED list of
denied-by-default rights, which (only) contains
LANDLOCK_ACCESS_FS_REFER.  All domains are treated as if they are also
handling this list, but without modifying their fs_access_masks field.

A side effect is that the errno code returned by rename(2) or link(2)
*may* be changed from EXDEV to EACCES according to the enforced
restrictions.  Indeed, we now have the mechanic to identify if an access
is denied because of a required right (e.g. LANDLOCK_ACCESS_FS_MAKE_REG,
LANDLOCK_ACCESS_FS_REMOVE_FILE) or if it is denied because of missing
LANDLOCK_ACCESS_FS_REFER rights.  This may result in different errno
codes than for the initial Landlock version, but this approach is more
consistent and better for rename/link compatibility reasons, and it
wasn't possible before (hence no backport to ABI v1).  The
layout1.rename_file test reflects this change.

Add 4 layout1.refer_denied_by_default* test suites to check that the
behavior of a ruleset not handling LANDLOCK_ACCESS_FS_REFER (ABI v1) is
unchanged even if another layer handles LANDLOCK_ACCESS_FS_REFER (i.e.
ABI v1 precedence).  Make sure rule's absolute access rights are correct
by testing with and without a matching path.  Add test_rename() and
test_exchange() helpers.

Extend layout1.inval tests to check that a denied-by-default access
right is not necessarily part of a domain's handled access rights.

Test coverage for security/landlock is 95.3% of 599 lines according to
gcc/gcov-11.

Fixes: b91c3e4ea7 ("landlock: Add support for file reparenting with LANDLOCK_ACCESS_FS_REFER")
Reviewed-by: Paul Moore <paul@paul-moore.com>
Reviewed-by: Günther Noack <gnoack3000@gmail.com>
Link: https://lore.kernel.org/r/20220831203840.1370732-1-mic@digikod.net
Cc: stable@vger.kernel.org
[mic: Constify and slightly simplify test helpers]
Signed-off-by: Mickaël Salaün <mic@digikod.net>
2022-09-02 15:29:08 +02:00
Dan Carpenter
e9ea0b30ad xen/grants: prevent integer overflow in gnttab_dma_alloc_pages()
The change from kcalloc() to kvmalloc() means that arg->nr_pages
might now be large enough that the "args->nr_pages << PAGE_SHIFT" can
result in an integer overflow.

Fixes: b3f7931f5c ("xen/gntdev: switch from kcalloc() to kvcalloc()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/YxDROJqu/RPvR0bi@kili
Signed-off-by: Juergen Gross <jgross@suse.com>
2022-09-02 11:05:19 +02:00
SeongJae Park
fe8f65b018 xen-blkfront: Cache feature_persistent value before advertisement
Xen blkfront advertises its support of the persistent grants feature
when it first setting up and when resuming in 'talk_to_blkback()'.
Then, blkback reads the advertised value when it connects with blkfront
and decides if it will use the persistent grants feature or not, and
advertises its decision to blkfront.  Blkfront reads the blkback's
decision and it also makes the decision for the use of the feature.

Commit 402c43ea6b ("xen-blkfront: Apply 'feature_persistent' parameter
when connect"), however, made the blkfront's read of the parameter for
disabling the advertisement, namely 'feature_persistent', to be done
when it negotiate, not when advertise.  Therefore blkfront advertises
without reading the parameter.  As the field for caching the parameter
value is zero-initialized, it always advertises as the feature is
disabled, so that the persistent grants feature becomes always disabled.

This commit fixes the issue by making the blkfront does parmeter caching
just before the advertisement.

Fixes: 402c43ea6b ("xen-blkfront: Apply 'feature_persistent' parameter when connect")
Cc: <stable@vger.kernel.org> # 5.10.x
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: SeongJae Park <sj@kernel.org>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20220831165824.94815-4-sj@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
2022-09-02 11:05:15 +02:00
SeongJae Park
9f5e0fe5d0 xen-blkfront: Advertise feature-persistent as user requested
The advertisement of the persistent grants feature (writing
'feature-persistent' to xenbus) should mean not the decision for using
the feature but only the availability of the feature.  However, commit
74a852479c ("xen-blkfront: add a parameter for disabling of persistent
grants") made a field of blkfront, which was a place for saving only the
negotiation result, to be used for yet another purpose: caching of the
'feature_persistent' parameter value.  As a result, the advertisement,
which should follow only the parameter value, becomes inconsistent.

This commit fixes the misuse of the semantic by making blkfront saves
the parameter value in a separate place and advertises the support based
on only the saved value.

Fixes: 74a852479c ("xen-blkfront: add a parameter for disabling of persistent grants")
Cc: <stable@vger.kernel.org> # 5.10.x
Suggested-by: Juergen Gross <jgross@suse.com>
Signed-off-by: SeongJae Park <sj@kernel.org>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20220831165824.94815-3-sj@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
2022-09-02 11:05:12 +02:00
SeongJae Park
06ba5d2e94 xen-blkback: Advertise feature-persistent as user requested
The advertisement of the persistent grants feature (writing
'feature-persistent' to xenbus) should mean not the decision for using
the feature but only the availability of the feature.  However, commit
aac8a70db2 ("xen-blkback: add a parameter for disabling of persistent
grants") made a field of blkback, which was a place for saving only the
negotiation result, to be used for yet another purpose: caching of the
'feature_persistent' parameter value.  As a result, the advertisement,
which should follow only the parameter value, becomes inconsistent.

This commit fixes the misuse of the semantic by making blkback saves the
parameter value in a separate place and advertises the support based on
only the saved value.

Fixes: aac8a70db2 ("xen-blkback: add a parameter for disabling of persistent grants")
Cc: <stable@vger.kernel.org> # 5.10.x
Suggested-by: Juergen Gross <jgross@suse.com>
Signed-off-by: SeongJae Park <sj@kernel.org>
Tested-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20220831165824.94815-2-sj@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
2022-09-02 11:05:06 +02:00
Nathan Chancellor
6cf07810e9 powerpc/papr_scm: Ensure rc is always initialized in papr_scm_pmu_register()
Clang warns:

  arch/powerpc/platforms/pseries/papr_scm.c:492:6: warning: variable 'rc' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
          if (!p->stat_buffer_len)
              ^~~~~~~~~~~~~~~~~~~
  arch/powerpc/platforms/pseries/papr_scm.c:523:64: note: uninitialized use occurs here
          dev_info(&p->pdev->dev, "nvdimm pmu didn't register rc=%d\n", rc);
                                                                        ^~
  include/linux/dev_printk.h:150:67: note: expanded from macro 'dev_info'
          dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__)
                                                                          ^~~~~~~~~~~
  include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap'
                  _p_func(dev, fmt, ##__VA_ARGS__);                       \
                                      ^~~~~~~~~~~
  arch/powerpc/platforms/pseries/papr_scm.c:492:2: note: remove the 'if' if its condition is always false
          if (!p->stat_buffer_len)
          ^~~~~~~~~~~~~~~~~~~~~~~~
  arch/powerpc/platforms/pseries/papr_scm.c:484:8: note: initialize the variable 'rc' to silence this warning
          int rc, nodeid;
                ^
                = 0
  1 warning generated.

The call to papr_scm_pmu_check_events() was eliminated but a return code
was not added to the if statement. Add the same return code from
papr_scm_pmu_check_events() for this condition so there is no more
warning.

Fixes: 9b1ac04698 ("powerpc/papr_scm: Fix nvdimm event mappings")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://github.com/ClangBuiltLinux/linux/issues/1701
Link: https://lore.kernel.org/r/20220830151256.1473169-1-nathan@kernel.org
2022-09-02 18:55:11 +10:00