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c6ff459037
In cifs_sfu_make_node(), on success, instantiate rather than leave it
with dentry unhashed negative to support callers that expect mknod(2)
to always instantiate.
This fixes the following test case:
mount.cifs //srv/share /mnt -o ...,sfu
mkfifo /mnt/fifo
./xfstests/ltp/growfiles -b -W test -e 1 -u -i 0 -L 30 /mnt/fifo
...
BUG: unable to handle page fault for address: 000000034cec4e58
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: 0000 1 PREEMPT SMP PTI
CPU: 0 PID: 138098 Comm: growfiles Kdump: loaded Not tainted
5.14.0-436.3987_1240945149.el9.x86_64 #1
Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
RIP: 0010:_raw_callee_save__kvm_vcpu_is_preempted+0x0/0x20
Code: e8 15 d9 61 00 e9 63 ff ff ff 41 bd ea ff ff ff e9 58 ff ff ff e8
d0 71 c0 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 04
fd 60 2b c1 99 80 b8 90 50 03 00 00 0f 95 c0 c3 cc cc cc
RSP: 0018:ffffb6a143cf7cf8 EFLAGS: 00010206
RAX: ffff8a9bc30fb038 RBX: ffff8a9bc666a200 RCX: ffff8a9cc0260000
RDX: 00000000736f622e RSI: ffff8a9bc30fb038 RDI: 000000007665645f
RBP: ffffb6a143cf7d70 R08: 0000000000001000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8a9bc666a200
R13: 0000559a302a12b0 R14: 0000000000001000 R15: 0000000000000000
FS: 00007fbed1dbb740(0000) GS:ffff8a9cf0000000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000034cec4e58 CR3: 0000000128ec6006 CR4: 0000000000770ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
<TASK>
? show_trace_log_lvl+0x1c4/0x2df
? show_trace_log_lvl+0x1c4/0x2df
? __mutex_lock.constprop.0+0x5f7/0x6a0
? __die_body.cold+0x8/0xd
? page_fault_oops+0x134/0x170
? exc_page_fault+0x62/0x150
? asm_exc_page_fault+0x22/0x30
? _pfx_raw_callee_save__kvm_vcpu_is_preempted+0x10/0x10
__mutex_lock.constprop.0+0x5f7/0x6a0
? __mod_memcg_lruvec_state+0x84/0xd0
pipe_write+0x47/0x650
? do_anonymous_page+0x258/0x410
? inode_security+0x22/0x60
? selinux_file_permission+0x108/0x150
vfs_write+0x2cb/0x410
ksys_write+0x5f/0xe0
do_syscall_64+0x5c/0xf0
? syscall_exit_to_user_mode+0x22/0x40
? do_syscall_64+0x6b/0xf0
? sched_clock_cpu+0x9/0xc0
? exc_page_fault+0x62/0x150
entry_SYSCALL_64_after_hwframe+0x6e/0x76
Cc: stable@vger.kernel.org
Fixes:
|
||
---|---|---|
arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
fs | ||
include | ||
init | ||
io_uring | ||
ipc | ||
kernel | ||
lib | ||
LICENSES | ||
mm | ||
net | ||
rust | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.clang-format | ||
.cocciconfig | ||
.editorconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.mailmap | ||
.rustfmt.toml | ||
COPYING | ||
CREDITS | ||
Kbuild | ||
Kconfig | ||
MAINTAINERS | ||
Makefile | ||
README |
Linux kernel ============ There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. The formatted documentation can also be read online at: https://www.kernel.org/doc/html/latest/ There are various text files in the Documentation/ subdirectory, several of them using the reStructuredText markup notation. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.