Hello,
kernel test robot noticed "kernel_BUG_at_fs/dcache.c" on:
commit: 493ec81a8fb8e4ada6f223b8b73791a1280d4774 ("eventfs: Stop using
dcache_readdir() for getdents()")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
[test failed on linux-next/master 8cb47d7cd090a690c1785385b2f3d407d4a53ad0]
[test failed on fix commit 1e4624eb5a0ecaae0d2c4e3019bece119725bb98]
in testcase: stress-ng
version: stress-ng-x86_64-3040a078a-1_20231212
with following parameters:
nr_threads: 10%
disk: 1HDD
testtime: 60s
fs: btrfs
class: filesystem
test: getdent
cpufreq_governor: performance
compiler: gcc-12
test machine: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz
(Ice Lake) with 256G 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.s...@intel.com>
| Closes:
https://lore.kernel.org/oe-lkp/202401152142.bfc28861-oliver.s...@intel.com
[ 41.602502][ T4375] ------------[ cut here ]------------
[ 41.602519][ T4376] ------------[ cut here ]------------
[ 41.602607][ T4374] ------------[ cut here ]------------
[ 41.602607][ T4378] ------------[ cut here ]------------
[ 41.602608][ T4374] kernel BUG at fs/dcache.c:2031!
[ 41.602608][ T4378] kernel BUG at fs/dcache.c:2031!
[ 41.602613][ T4374] invalid opcode: 0000 [#1] SMP NOPTI
[ 41.602616][ T4374] CPU: 50 PID: 4374 Comm: stress-ng-getde Not tainted
6.7.0-rc2-00042-g493ec81a8fb8 #1
[ 41.602618][ T4374] Hardware name: Inspur NF5180M6/NF5180M6, BIOS 06.00.04
04/12/2022
[ 41.602619][ T4374] RIP: 0010:d_instantiate (fs/dcache.c:2031 (discriminator
1))
[ 41.602623][ T4377] ------------[ cut here ]------------
[ 41.602623][ T4374] Code: e8 92 c0 1c 00 4c 89 e7 e8 0a 79 b8 00 48 89 ef 48
89 de e8 7f fc ff ff 4c 89 e7 c6 07 00 0f 1f 00 5b 5d 41 5c c3 cc cc cc cc <0f>
0b 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00
All code
========
0: e8 92 c0 1c 00 callq 0x1cc097
5: 4c 89 e7 mov %r12,%rdi
8: e8 0a 79 b8 00 callq 0xb87917
d: 48 89 ef mov %rbp,%rdi
10: 48 89 de mov %rbx,%rsi
13: e8 7f fc ff ff callq 0xfffffffffffffc97
18: 4c 89 e7 mov %r12,%rdi
1b: c6 07 00 movb $0x0,(%rdi)
1e: 0f 1f 00 nopl (%rax)
21: 5b pop %rbx
22: 5d pop %rbp
23: 41 5c pop %r12
25: c3 retq
26: cc int3
27: cc int3
28: cc int3
29: cc int3
2a:* 0f 0b ud2 <-- trapping instruction
2c: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
33: 00 00 00 00
37: 66 data16
38: 66 data16
39: 2e cs
3a: 0f .byte 0xf
3b: 1f (bad)
3c: 84 00 test %al,(%rax)
...
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
9: 00 00 00 00
d: 66 data16
e: 66 data16
f: 2e cs
10: 0f .byte 0xf
11: 1f (bad)
12: 84 00 test %al,(%rax)
...
[ 41.602625][ T4377] kernel BUG at fs/dcache.c:2031!
[ 41.602625][ T4374] RSP: 0018:ffa000000fcdfcd0 EFLAGS: 00010286
[ 41.602629][ T4374] RAX: 0000000000000002 RBX: ff11000109392980 RCX:
0000000000000000
[ 41.602630][ T4374] RDX: 0000000000000000 RSI: ff1100405e46c6f0 RDI:
ff1100405f05afc0
[ 41.602631][ T4374] RBP: ff1100405f05afc0 R08: ffffffff830ad0e0 R09:
0000000000000000
[ 41.602632][ T4374] R10: 0000000000000280 R11: ffffffff8162036a R12:
0000000000000000
[ 41.602633][ T4374] R13: ff1100405e46c6f0 R14: ff1100405f05aff8 R15:
0000000000000000
[ 41.602634][ T4374] FS: 00007f2582ff9740(0000) GS:ff1100407fa80000(0000)
knlGS:0000000000000000
[ 41.602635][ T4374] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 41.602635][ T4374] CR2: 00005624511f3328 CR3: 000000208a342006 CR4:
0000000000771ef0
[ 41.602636][ T4374] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 41.602637][ T4374] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 41.602638][ T4374] PKRU: 55555554
[ 41.602638][ T4374] Call Trace:
[ 41.602640][ T4374] <TASK>
[ 41.602642][ T4374] ? die (arch/x86/kernel/dumpstack.c:421
arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447)
[ 41.602644][ T4374] ? do_trap (arch/x86/kernel/traps.c:112
arch/x86/kernel/traps.c:153)
[ 41.602645][ T4374] ? d_instantiate (fs/dcache.c:2031 (discriminator 1))
[ 41.602647][ T4374] ? do_error_trap (arch/x86/include/asm/traps.h:59
arch/x86/kernel/traps.c:174)
[ 41.602648][ T4374] ? d_instantiate (fs/dcache.c:2031 (discriminator 1))
[ 41.602649][ T4374] ? exc_invalid_op (arch/x86/kernel/traps.c:265)
[ 41.602652][ T4374] ? d_instantiate (fs/dcache.c:2031 (discriminator 1))
[ 41.602653][ T4374] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:568)
[ 41.602655][ T4374] ? tracefs_alloc_inode (fs/tracefs/inode.c:38)
[ 41.602657][ T4374] ? d_instantiate (fs/dcache.c:2031 (discriminator 1))
[ 41.602659][ T4374] create_dir_dentry (fs/tracefs/event_inode.c:329
fs/tracefs/event_inode.c:516)
[ 41.602661][ T4374] eventfs_root_lookup (fs/tracefs/event_inode.c:611)
[ 41.602662][ T4374] ? terminate_walk (fs/namei.c:691)
[ 41.602665][ T4374] __lookup_slow (fs/namei.c:1694)
[ 41.602667][ T4374] lookup_one_len (fs/namei.c:2746 (discriminator 1))
[ 41.602669][ T4374] eventfs_start_creating (fs/tracefs/inode.c:536)
[ 41.602671][ T4374] create_dir_dentry (fs/tracefs/event_inode.c:309
fs/tracefs/event_inode.c:516)
[ 41.602673][ T4374] eventfs_iterate (fs/tracefs/event_inode.c:701)
[ 41.602674][ T4374] ? atime_needs_update (fs/inode.c:1842 fs/inode.c:1994)
[ 41.602677][ T4374] iterate_dir (fs/readdir.c:106)
[ 41.602680][ T4374] __x64_sys_getdents (fs/readdir.c:323 fs/readdir.c:307
fs/readdir.c:307)
[ 41.602682][ T4374] ? __pfx_filldir (fs/readdir.c:260)
[ 41.602684][ T4374] do_syscall_64 (arch/x86/entry/common.c:51
arch/x86/entry/common.c:82)
[ 41.602686][ T4374] entry_SYSCALL_64_after_hwframe
(arch/x86/entry/entry_64.S:129)
[ 41.602690][ T4374] RIP: 0033:0x7f2583190f29
[ 41.602691][ T4374] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
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 8b 0d 37 8f 0d 00 f7 d8 64 89 01 48
All code
========
0: 00 c3 add %al,%bl
2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
9: 00 00 00
c: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
11: 48 89 f8 mov %rdi,%rax
14: 48 89 f7 mov %rsi,%rdi
17: 48 89 d6 mov %rdx,%rsi
1a: 48 89 ca mov %rcx,%rdx
1d: 4d 89 c2 mov %r8,%r10
20: 4d 89 c8 mov %r9,%r8
23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9
28: 0f 05 syscall
2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <--
trapping instruction
30: 73 01 jae 0x33
32: c3 retq
33: 48 8b 0d 37 8f 0d 00 mov 0xd8f37(%rip),%rcx # 0xd8f71
3a: f7 d8 neg %eax
3c: 64 89 01 mov %eax,%fs:(%rcx)
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
6: 73 01 jae 0x9
8: c3 retq
9: 48 8b 0d 37 8f 0d 00 mov 0xd8f37(%rip),%rcx # 0xd8f47
10: f7 d8 neg %eax
12: 64 89 01 mov %eax,%fs:(%rcx)
15: 48 rex.W
[ 41.602692][ T4374] RSP: 002b:00007ffe038f3e28 EFLAGS: 00000246 ORIG_RAX:
000000000000004e
[ 41.602694][ T4374] RAX: ffffffffffffffda RBX: 0000000000001000 RCX:
00007f2583190f29
[ 41.602695][ T4374] RDX: 0000000000001000 RSI: 0000562451159150 RDI:
0000000000000008
[ 41.602695][ T4374] RBP: 00007f2582fcd398 R08: 00007f2582fcd398 R09:
00007f2582fcd398
[ 41.602696][ T4374] R10: 00007f2582fcd398 R11: 0000000000000246 R12:
00007f2582fcd398
[ 41.602696][ T4374] R13: 0000562451159150 R14: 00007ffe038f80d8 R15:
0000000000000008
[ 41.602697][ T4374] </TASK>
[ 41.602698][ T4374] Modules linked in: binfmt_misc dm_mod intel_rapl_msr
intel_rapl_common btrfs blake2b_generic x86_pkg_temp_thermal xor coretemp
raid6_pq libcrc32c kvm_intel ipmi_ssif kvm irqbypass nvme crct10dif_pclmul
crc32_pclmul sd_mod crc32c_intel nvme_core sg ghash_clmulni_intel sha512_ssse3
ahci t10_pi rapl libahci ast intel_cstate mei_me crc64_rocksoft_generic
drm_shmem_helper intel_uncore dax_hmem acpi_ipmi ioatdma i2c_i801
crc64_rocksoft megaraid_sas crc64 ipmi_si libata drm_kms_helper mei i2c_smbus
intel_pch_thermal joydev dca wmi ipmi_devintf ipmi_msghandler acpi_power_meter
drm fuse ip_tables
[ 41.602723][ T4374] ---[ end trace 0000000000000000 ]---
[ 41.602724][ T4378] invalid opcode: 0000 [#2] SMP NOPTI
[ 41.602726][ T4378] CPU: 27 PID: 4378 Comm: stress-ng-getde Tainted: G
D 6.7.0-rc2-00042-g493ec81a8fb8 #1
[ 41.602728][ T4378] Hardware name: Inspur NF5180M6/NF5180M6, BIOS 06.00.04
04/12/2022
[ 41.602729][ T4378] RIP: 0010:d_instantiate (fs/dcache.c:2031 (discriminator
1))
[ 41.602733][ T4378] Code: e8 92 c0 1c 00 4c 89 e7 e8 0a 79 b8 00 48 89 ef 48
89 de e8 7f fc ff ff 4c 89 e7 c6 07 00 0f 1f 00 5b 5d 41 5c c3 cc cc cc cc <0f>
0b 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 2e 0f 1f 84 00 00 00
All code
========
0: e8 92 c0 1c 00 callq 0x1cc097
5: 4c 89 e7 mov %r12,%rdi
8: e8 0a 79 b8 00 callq 0xb87917
d: 48 89 ef mov %rbp,%rdi
10: 48 89 de mov %rbx,%rsi
13: e8 7f fc ff ff callq 0xfffffffffffffc97
18: 4c 89 e7 mov %r12,%rdi
1b: c6 07 00 movb $0x0,(%rdi)
1e: 0f 1f 00 nopl (%rax)
21: 5b pop %rbx
22: 5d pop %rbp
23: 41 5c pop %r12
25: c3 retq
26: cc int3
27: cc int3
28: cc int3
29: cc int3
2a:* 0f 0b ud2 <-- trapping instruction
2c: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
33: 00 00 00 00
37: 66 data16
38: 66 data16
39: 2e cs
3a: 0f .byte 0xf
3b: 1f (bad)
3c: 84 00 test %al,(%rax)
...
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
9: 00 00 00 00
d: 66 data16
e: 66 data16
f: 2e cs
10: 0f .byte 0xf
11: 1f (bad)
12: 84 00 test %al,(%rax)
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240115/202401152142.bfc28861-oliver.s...@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
