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linux/arch/sparc/kernel
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Andy Lutomirski f56141e3e2 all arches, signal: move restart_block to struct task_struct 
If an attacker can cause a controlled kernel stack overflow, overwriting
the restart block is a very juicy exploit target.  This is because the
restart_block is held in the same memory allocation as the kernel stack.

Moving the restart block to struct task_struct prevents this exploit by
making the restart_block harder to locate.

Note that there are other fields in thread_info that are also easy
targets, at least on some architectures.

It's also a decent simplification, since the restart code is more or less
identical on all architectures.

[james.hogan@imgtec.com: metag: align thread_info::supervisor_stack]
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: David Miller <davem@davemloft.net>
Acked-by: Richard Weinberger <richard@nod.at>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-12 18:54:12 -08:00
..
.gitignore
apc.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
asm-offsets.c [PATCH] sparc32: vm_area_struct access for old Sun SPARCs. 2013-07-10 13:56:10 -07:00
audit.c sparc64: fix sparse warnings in compat_audit.c 2014-05-18 19:01:34 -07:00
auxio_32.c sparc32: fix sparse warning in auxio_32.c 2014-05-18 19:01:27 -07:00
auxio_64.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
btext.c sparc64: fix sparse warning in btext.c 2014-05-18 19:01:30 -07:00
central.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
cherrs.S
chmc.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
compat_audit.c sparc64: fix sparse warnings in compat_audit.c 2014-05-18 19:01:34 -07:00
cpu.c sparc64: correctly recognise M6 and M7 cpu type 2014-09-09 15:24:10 -07:00
cpumap.c sparc64: support M6 and M7 for building CPU distribution map 2014-09-09 15:24:10 -07:00
cpumap.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
devices.c sparc32: drop tadpole specific code 2014-05-18 19:01:29 -07:00
dma.c
ds.c sparc64: Move request_irq() from ldc_bind() to ldc_alloc() 2014-09-16 18:31:31 -07:00
dtlb_miss.S
dtlb_prot.S sparc64: Fix corrupted thread fault code. 2014-10-18 23:03:09 -04:00
ebus.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
entry.h sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
entry.S sparc32: Fix exit flag passed from traced sys_sigreturn 2013-07-31 19:10:04 -07:00
etrap_32.S sparc32: introduce support for run-time patching for all shared assembler code 2012-05-27 23:52:49 -07:00
etrap_64.S sparc64: clear syscall_noerror on the entry to syscall, not on the exit 2012-10-14 19:26:52 -04:00
fpu_traps.S
ftrace.c ftrace: Do not pass data to ftrace_dyn_arch_init 2014-03-07 10:06:14 -05:00
getsetcc.S
head_32.S sparc32: drop swapper_pg_dir 2012-07-26 16:46:15 -07:00
head_64.S sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
helpers.S
hvapi.c sparc64: T5 PMU 2014-09-16 18:26:40 -07:00
hvcalls.S sparc64: T5 PMU 2014-09-16 18:26:40 -07:00
hvtramp.S sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
idprom.c
iommu_common.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
iommu.c sparc64: fix sparse warning in pci.c 2014-05-18 19:01:31 -07:00
ioport.c sparc32: dma_alloc_coherent must honour gfp flags 2014-09-10 14:03:28 -07:00
irq_32.c sparc32: fix sparse warnings in irq_32.c 2014-04-29 01:12:25 -04:00
irq_64.c sparc64: sparse irq 2014-10-05 16:53:40 -07:00
irq.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
itlb_miss.S
ivec.S
jump_label.c
kernel.h sparc64: fix sparse warning in kgdb_64.c 2014-05-18 19:01:34 -07:00
kgdb_32.c sparc: explicitly include sched.h to get task_thread_info declaration 2013-02-06 11:04:10 -08:00
kgdb_64.c sparc64: fix sparse warning in kgdb_64.c 2014-05-18 19:01:34 -07:00
kprobes.c sparc: Replace __get_cpu_var uses 2014-08-26 13:45:55 -04:00
kstack.h
ktlb.S sparc64: Adjust vmalloc region size based upon available virtual address bits. 2014-10-05 16:53:40 -07:00
ldc.c sparc/ldc: create separate ldc_unbind from ldc_free 2014-12-11 18:52:45 -08:00
led.c
leon_kernel.c sparc: leon: Fix race condition between leon_cycles_offset and timer_interrupt 2014-09-09 16:39:10 -07:00
leon_pci_grpci1.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
leon_pci_grpci2.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
leon_pci.c sparc32: introduce asm-generic/io.h 2014-05-02 01:30:21 -04:00
leon_pmc.c sparc32: fix sparse warnings in leon_pmc.c 2014-04-29 01:12:27 -04:00
leon_smp.c sparc32, leon: Align ccall_info to prevent unaligned traps on crosscall 2014-12-11 18:51:56 -08:00
Makefile sparc32: drop tadpole specific code 2014-05-18 19:01:29 -07:00
mdesc.c sparc: Add support for seek and shorter read to /dev/mdesc 2014-07-21 21:37:06 -07:00
misctrap.S
module.c mm/arch: use NUMA_NO_NODE 2013-11-13 12:09:05 +09:00
nmi.c sparc: Replace __get_cpu_var uses 2014-08-26 13:45:55 -04:00
of_device_32.c
of_device_64.c devicetree: add helper inline for retrieving a node's full name 2012-07-06 07:16:34 -05:00
of_device_common.c sparc: fix sparse warnings in of_device_common.c 2014-04-29 01:12:27 -04:00
of_device_common.h
pci_common.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
pci_fire.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
pci_impl.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
pci_msi.c PCI/MSI: Rename mask/unmask_msi_irq treewide 2014-11-23 13:01:45 +01:00
pci_psycho.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
pci_sabre.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
pci_schizo.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
pci_sun4v_asm.S
pci_sun4v.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
pci_sun4v.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
pci.c sparc/PCI: Clip bridge windows to fit in upstream windows 2015-01-16 10:04:43 -06:00
pcic.c sparc32: fix sparse warnings in pcic.c 2014-05-18 19:01:27 -07:00
pcr.c sparc64: T5 PMU 2014-09-16 18:26:40 -07:00
perf_event.c Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
pmc.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
power.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
process_32.c sparc32: fix sparse warning in auxio_32.c 2014-05-18 19:01:27 -07:00
process_64.c sparc64: Fix pcr_ops initialization and usage bugs. 2014-08-11 20:45:12 -07:00
prom_32.c
prom_64.c sparc64: fix sparse warning in prom_64.c 2014-05-18 19:01:31 -07:00
prom_common.c of: Fix locking vs. interrupts 2013-06-13 22:12:14 +01:00
prom_irqtrans.c
prom.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
psycho_common.c
psycho_common.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
ptrace_32.c sparc32: fix sparse warning in ptrace_32.c 2014-04-29 01:12:26 -04:00
ptrace_64.c ARCH: AUDIT: audit_syscall_entry() should not require the arch 2014-09-23 16:21:26 -04:00
reboot.c
rtrap_32.S sparc32: introduce support for run-time patching for all shared assembler code 2012-05-27 23:52:49 -07:00
rtrap_64.S Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-19 10:40:00 -08:00
sbus.c sparc: kernel/sbus.c: fix memory leakage 2013-01-21 14:33:00 -08:00
setup_32.c sparc32: fix sparse warnings in setup_32.c 2014-04-29 01:12:25 -04:00
setup_64.c sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
signal32.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
signal_32.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
signal_64.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
sigutil_32.c
sigutil_64.c
sigutil.h
smp_32.c sparc: fix decimal printf format specifiers prefixed with 0x 2014-08-06 14:41:10 -07:00
smp_64.c sparc64: Do irq_{enter,exit}() around generic_smp_call_function*(). 2014-11-07 09:50:48 -08:00
sparc_ksyms_32.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
sparc_ksyms_64.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
spiterrs.S
sstate.c
stacktrace.c
starfire.c
sun4d_irq.c sparc32: fix sparse warnings in sun4d_irq.c 2014-04-29 01:12:25 -04:00
sun4d_smp.c sparc: Replace __get_cpu_var uses 2014-08-26 13:45:55 -04:00
sun4m_irq.c sun4M: add include of slab.h for kzalloc 2014-02-12 16:10:45 -05:00
sun4m_smp.c sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
sun4v_ivec.S
sun4v_tlb_miss.S sparc64: sun4v TLB error power off events 2014-09-16 17:46:44 -07:00
sys32.S sparc: Hook up renameat2 syscall. 2014-07-21 22:27:56 -07:00
sys_sparc32.c sparc64: fix sparse warnings in sys_sparc32.c 2014-05-18 19:01:31 -07:00
sys_sparc_32.c sparc32: fix sparse warnings in sys_sparc_32.c 2014-05-18 19:01:28 -07:00
sys_sparc_64.c sparc64: fix sparse warnings in sys_sparc_64.c + unaligned_64.c 2014-05-18 19:01:30 -07:00
syscalls.S sparc: hook up execveat system call 2014-12-13 12:42:51 -08:00
sysfs.c sparc64: fix format string mismatch in arch/sparc/kernel/sysfs.c 2014-05-21 12:54:42 -07:00
systbls_32.S sparc: hook up execveat system call 2014-12-13 12:42:51 -08:00
systbls_64.S sparc: hook up execveat system call 2014-12-13 12:42:51 -08:00
systbls.h sparc64: fix sparse warnings in sys_sparc32.c 2014-05-18 19:01:31 -07:00
time_32.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
time_64.c sparc: kernel: drop owner assignment from platform_drivers 2014-10-20 16:20:15 +02:00
trampoline_32.S sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
trampoline_64.S sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
traps_32.c sparc: fix sparse warning in math_{32,64} 2014-05-18 19:01:28 -07:00
traps_64.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
tsb.S sparc64: Fix corrupted thread fault code. 2014-10-18 23:03:09 -04:00
ttable_32.S sparc32: move trap table to a separate file 2012-05-19 23:27:25 -07:00
ttable_64.S sparc64: renamed ttable.S to ttable_64.S 2012-05-19 23:26:41 -07:00
una_asm_32.S
una_asm_64.S
unaligned_32.c sparc: use %s for unaligned panic 2014-07-21 21:37:06 -07:00
unaligned_64.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next 2014-06-19 07:50:07 -10:00
utrap.S
vio.c sparc64: Add vio_set_intr() to enable/disable Rx interrupts 2014-09-30 14:40:45 -07:00
viohs.c sparc: VIO protocol version 1.6 2014-09-30 14:17:08 -07:00
visemul.c sparc64: Make montmul/montsqr/mpmul usable in 32-bit threads. 2012-10-26 15:18:37 -07:00
vmlinux.lds.S sparc64: Kill unnecessary tables and increase MAX_BANKS. 2014-10-05 16:53:40 -07:00
windows.c sparc32: fix sparse warnings in windows.c 2014-04-29 01:12:25 -04:00
winfixup.S sparc64: Make montmul/montsqr/mpmul usable in 32-bit threads. 2012-10-26 15:18:37 -07:00
wof.S sparc32: introduce support for run-time patching for all shared assembler code 2012-05-27 23:52:49 -07:00
wuf.S sparc32: introduce support for run-time patching for all shared assembler code 2012-05-27 23:52:49 -07:00