Hello,
kernel test robot noticed "BUG:KASAN:wild-memory-access_in__fscache_use_cookie" on:
commit: c9c4ff12df110feb1b91951010f673f4b16e49e8 ("netfs: Move pinning-for-writeback from fscache to netfs")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
[test failed on linus/master 3aaa8ce7a3350d95b241046ae2401103a4384ba2]
[test failed on linux-next/master 8ffc8b1bbd505e27e2c8439d326b6059c906c9dd]
in testcase: xfstests
version: xfstests-x86_64-386c7b6a-1_20240304
with following parameters:
disk: 4HDD
fs: ext4
fs2: smbv2
test: generic-group-60
compiler: gcc-12
test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz (Skylake) with 32G memory
(please refer to attached dmesg/kmsg for entire log/backtrace)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202403131625.ef8a3315-oliver.sang@xxxxxxxxx
[ 188.580903][ T3137] BUG: KASAN: wild-memory-access in __fscache_use_cookie (arch/x86/include/asm/bitops.h:206 arch/x86/include/asm/bitops.h:238 include/asm-generic/bitops/instrumented-non-atomic.h:142 fs/netfs/fscache_cookie.c:577)
[ 188.588776][ T3137] Read of size 8 at addr cccccccccccccd54 by task xfs_io/3137
[ 188.596127][ T3137]
[ 188.598326][ T3137] CPU: 3 PID: 3137 Comm: xfs_io Tainted: G S 6.7.0-rc7-00007-gc9c4ff12df11 #1
[ 188.608454][ T3137] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.8.1 12/05/2017
[ 188.616571][ T3137] Call Trace:
[ 188.619723][ T3137] <TASK>
[ 188.622527][ T3137] dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))
[ 188.626903][ T3137] kasan_report (mm/kasan/report.c:590)
[ 188.631192][ T3137] ? __fscache_use_cookie (arch/x86/include/asm/bitops.h:206 arch/x86/include/asm/bitops.h:238 include/asm-generic/bitops/instrumented-non-atomic.h:142 fs/netfs/fscache_cookie.c:577)
[ 188.636349][ T3137] kasan_check_range (mm/kasan/generic.c:181 mm/kasan/generic.c:187)
[ 188.641069][ T3137] __fscache_use_cookie (arch/x86/include/asm/bitops.h:206 arch/x86/include/asm/bitops.h:238 include/asm-generic/bitops/instrumented-non-atomic.h:142 fs/netfs/fscache_cookie.c:577)
[ 188.646051][ T3137] ? _raw_write_lock_irq (kernel/locking/spinlock.c:153)
[ 188.651036][ T3137] ? fscache_cookie_worker (fs/netfs/fscache_cookie.c:570)
[ 188.656367][ T3137] ? _raw_spin_lock_irq (arch/x86/include/asm/atomic.h:115 include/linux/atomic/atomic-arch-fallback.h:2164 include/linux/atomic/atomic-instrumented.h:1296 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:120 kernel/locking/spinlock.c:170)
[ 188.661262][ T3137] ? _raw_spin_lock (arch/x86/include/asm/atomic.h:115 include/linux/atomic/atomic-arch-fallback.h:2164 include/linux/atomic/atomic-instrumented.h:1296 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154)
[ 188.665810][ T3137] ? _raw_write_lock_irq (kernel/locking/spinlock.c:153)
[ 188.670790][ T3137] ? wb_wakeup_delayed (include/linux/spinlock.h:401 mm/backing-dev.c:397)
[ 188.675600][ T3137] netfs_dirty_folio (include/linux/fscache.h:273 fs/netfs/misc.c:45)
[ 188.680409][ T3137] cifs_write_end (fs/smb/client/file.c:3091) cifs
[ 188.685652][ T3137] ? cifs_write (fs/smb/client/file.c:3045) cifs
[ 188.690724][ T3137] ? cifs_readpage_worker (fs/smb/client/file.c:4764) cifs
[ 188.696664][ T3137] ? is_valid_gup_args (mm/gup.c:1979)
[ 188.701662][ T3137] ? inode_owner_or_capable (fs/inode.c:2499)
[ 188.707093][ T3137] ? cap_task_fix_setuid (security/commoncap.c:1142)
[ 188.712165][ T3137] generic_perform_write (mm/filemap.c:3929)
[ 188.717323][ T3137] ? folio_add_wait_queue (mm/filemap.c:3882)
[ 188.722565][ T3137] ? file_update_time (fs/inode.c:2170)
[ 188.727373][ T3137] cifs_strict_writev (fs/smb/client/file.c:3730 fs/smb/client/file.c:3760) cifs
[ 188.732941][ T3137] vfs_write (include/linux/fs.h:2020 fs/read_write.c:491 fs/read_write.c:584)
[ 188.737054][ T3137] ? kernel_write (fs/read_write.c:565)
[ 188.741600][ T3137] ? __get_file_rcu (arch/x86/include/asm/atomic64_64.h:15 include/linux/atomic/atomic-arch-fallback.h:2569 include/linux/atomic/atomic-arch-fallback.h:4529 include/linux/atomic/atomic-arch-fallback.h:4558 include/linux/atomic/atomic-arch-fallback.h:4578 include/linux/atomic/atomic-long.h:1731 include/linux/atomic/atomic-instrumented.h:4654 fs/file.c:869)
[ 188.746148][ T3137] ? __fget_light (fs/file.c:1140)
[ 188.750708][ T3137] __x64_sys_pwrite64 (fs/read_write.c:699 fs/read_write.c:709 fs/read_write.c:706 fs/read_write.c:706)
[ 188.755602][ T3137] ? vfs_write (fs/read_write.c:706)
[ 188.759887][ T3137] ? do_user_addr_fault (include/linux/rcupdate.h:779 include/linux/mm.h:688 arch/x86/mm/fault.c:1366)
[ 188.764959][ T3137] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 188.769245][ T3137] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
[ 188.775012][ T3137] RIP: 0033:0x7f7f3ffd43b7
[ 188.779296][ T3137] Code: 08 89 3c 24 48 89 4c 24 18 e8 05 f4 f8 ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 12 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 55 f4 f8 ff 48 8b
All code
========
0: 08 89 3c 24 48 89 or %cl,-0x76b7dbc4(%rcx)
6: 4c 24 18 rex.WR and $0x18,%al
9: e8 05 f4 f8 ff callq 0xfffffffffff8f413
e: 4c 8b 54 24 18 mov 0x18(%rsp),%r10
13: 48 8b 54 24 10 mov 0x10(%rsp),%rdx
18: 41 89 c0 mov %eax,%r8d
1b: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
20: 8b 3c 24 mov (%rsp),%edi
23: b8 12 00 00 00 mov $0x12,%eax
28: 0f 05 syscall
2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction
30: 77 31 ja 0x63
32: 44 89 c7 mov %r8d,%edi
35: 48 89 04 24 mov %rax,(%rsp)
39: e8 55 f4 f8 ff callq 0xfffffffffff8f493
3e: 48 rex.W
3f: 8b .byte 0x8b
Code starting with the faulting instruction
===========================================
0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
6: 77 31 ja 0x39
8: 44 89 c7 mov %r8d,%edi
b: 48 89 04 24 mov %rax,(%rsp)
f: e8 55 f4 f8 ff callq 0xfffffffffff8f469
14: 48 rex.W
15: 8b .byte 0x8b
[ 188.798823][ T3137] RSP: 002b:00007ffcffb5da70 EFLAGS: 00000293 ORIG_RAX: 0000000000000012
[ 188.807116][ T3137] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7f3ffd43b7
[ 188.814977][ T3137] RDX: 0000000000001000 RSI: 00005644520fa000 RDI: 0000000000000004
[ 188.822846][ T3137] RBP: 0000000000000000 R08: 0000000000000000 R09: 00005644520f9f80
[ 188.830716][ T3137] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
[ 188.838583][ T3137] R13: 0000000000001000 R14: 0000000000001000 R15: 00000000ffffffff
[ 188.846449][ T3137] </TASK>
[ 188.849338][ T3137] ==================================================================
[ 188.857341][ T3137] Disabling lock debugging due to kernel taint
[ 188.863392][ T3137] general protection fault, probably for non-canonical address 0xf9999599999999aa: 0000 [#1] PREEMPT SMP KASAN PTI
[ 188.875344][ T3137] KASAN: maybe wild-memory-access in range [0xcccccccccccccd50-0xcccccccccccccd57]
[ 188.884508][ T3137] CPU: 3 PID: 3137 Comm: xfs_io Tainted: G S B 6.7.0-rc7-00007-gc9c4ff12df11 #1
[ 188.894630][ T3137] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.8.1 12/05/2017
[ 188.902765][ T3137] RIP: 0010:__fscache_use_cookie (arch/x86/include/asm/bitops.h:206 arch/x86/include/asm/bitops.h:238 include/asm-generic/bitops/instrumented-non-atomic.h:142 fs/netfs/fscache_cookie.c:577)
[ 188.908533][ T3137] Code: f1 f1 f1 f1 c7 40 0c f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 e0 00 00 00 31 c0 e8 4a 41 cf ff 4c 89 e8 48 c1 e8 03 <80> 3c 28 00 0f 85 67 07 00 00 49 8b 87 88 00 00 00 83 e0 01 88 44
All code
========
0: f1 icebp
1: f1 icebp
2: f1 icebp
3: f1 icebp
4: c7 40 0c f3 f3 f3 f3 movl $0xf3f3f3f3,0xc(%rax)
b: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
12: 00 00
14: 48 89 84 24 e0 00 00 mov %rax,0xe0(%rsp)
1b: 00
1c: 31 c0 xor %eax,%eax
1e: e8 4a 41 cf ff callq 0xffffffffffcf416d
23: 4c 89 e8 mov %r13,%rax
26: 48 c1 e8 03 shr $0x3,%rax
2a:* 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction
2e: 0f 85 67 07 00 00 jne 0x79b
34: 49 8b 87 88 00 00 00 mov 0x88(%r15),%rax
3b: 83 e0 01 and $0x1,%eax
3e: 88 .byte 0x88
3f: 44 rex.R
Code starting with the faulting instruction
===========================================
0: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
4: 0f 85 67 07 00 00 jne 0x771
a: 49 8b 87 88 00 00 00 mov 0x88(%r15),%rax
11: 83 e0 01 and $0x1,%eax
14: 88 .byte 0x88
15: 44 rex.R
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240313/202403131625.ef8a3315-oliver.sang@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
