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Date: Fri, 5 May 2023 17:37:22 +0800
From: kernel test robot <yujie.liu@...el.com>
To: Ajay Kaher <akaher@...are.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
Steven Rostedt <rostedt@...dmis.org>,
Ching-lin Yu <chinglinyu@...gle.com>,
<linux-kernel@...r.kernel.org>,
<linux-trace-kernel@...r.kernel.org>, <mhiramat@...nel.org>,
<shuah@...nel.org>, <linux-kselftest@...r.kernel.org>,
<namit@...are.com>, <srivatsab@...are.com>,
<srivatsa@...il.mit.edu>, <amakhalov@...are.com>,
<vsirnapalli@...are.com>, <tkundu@...are.com>,
<er.ajay.kaher@...il.com>, Ajay Kaher <akaher@...are.com>
Subject: Re: [PATCH v2 8/9] eventfs: moving tracing/events to eventfs
Hello,
kernel test robot noticed "WARNING:at_fs/namei.c:#lookup_one_len" on:
commit: 2fe2002efb23a715f5eb7a58891ff85f4e37b084 ("[PATCH v2 8/9] eventfs: moving tracing/events to eventfs")
url: https://github.com/intel-lab-lkp/linux/commits/Ajay-Kaher/eventfs-introducing-struct-tracefs_inode/20230502-192949
base: https://git.kernel.org/cgit/linux/kernel/git/shuah/linux-kselftest.git next
patch link: https://lore.kernel.org/all/1683026600-13485-9-git-send-email-akaher@vmware.com/
patch subject: [PATCH v2 8/9] eventfs: moving tracing/events to eventfs
in testcase: stress-ng
version: stress-ng-x86_64-0.15.04-1_20230503
with following parameters:
nr_threads: 100%
testtime: 60s
class: cpu
test: uprobe
cpufreq_governor: performance
compiler: gcc-11
test machine: 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz (Ice Lake) with 128G memory
(please refer to attached dmesg/kmsg for entire log/backtrace)
If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@...el.com>
| Link: https://lore.kernel.org/oe-lkp/202305051619.9a469a9a-yujie.liu@intel.com
[ 49.551466][ T5878] ------------[ cut here ]------------
[ 49.557236][ T5878] WARNING: CPU: 68 PID: 5878 at fs/namei.c:2705 lookup_one_len (fs/namei.c:2705 (discriminator 1))
[ 49.565959][ T5878] Modules linked in: intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp btrfs blake2b_generic xor raid6_pq libcrc32c sd_mod t10_pi kvm_intel crc64_rocksoft_generic crc64_rocksoft kvm crc64 irqbypass sg crct10dif_pclmul crc32_pclmul crc32c_intel ipmi_ssif ghash_clmulni_intel sha512_ssse3 rapl ahci acpi_ipmi intel_cstate libahci ast mei_me drm_shmem_helper ipmi_si drm_kms_helper ipmi_devintf ioatdma syscopyarea sysfillrect intel_uncore libata sysimgblt mei joydev dca wmi ipmi_msghandler acpi_pad acpi_power_meter drm fuse ip_tables
[ 49.618899][ T5878] CPU: 68 PID: 5878 Comm: stress-ng-uprob Not tainted 6.3.0-rc1-00033-g2fe2002efb23 #1
[ 49.628810][ T5878] RIP: 0010:lookup_one_len (fs/namei.c:2705 (discriminator 1))
[ 49.634395][ T5878] Code: 83 c4 18 5d c3 cc cc cc cc 31 d2 48 89 ee 48 89 e7 e8 8a da ff ff 48 85 c0 75 d4 31 d2 48 89 ee 48 89 e7 e8 b8 db ff ff eb c5 <0f> 0b eb a6 e8 ad 85 ac 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 66
All code
========
0: 83 c4 18 add $0x18,%esp
3: 5d pop %rbp
4: c3 ret
5: cc int3
6: cc int3
7: cc int3
8: cc int3
9: 31 d2 xor %edx,%edx
b: 48 89 ee mov %rbp,%rsi
e: 48 89 e7 mov %rsp,%rdi
11: e8 8a da ff ff call 0xffffffffffffdaa0
16: 48 85 c0 test %rax,%rax
19: 75 d4 jne 0xffffffffffffffef
1b: 31 d2 xor %edx,%edx
1d: 48 89 ee mov %rbp,%rsi
20: 48 89 e7 mov %rsp,%rdi
23: e8 b8 db ff ff call 0xffffffffffffdbe0
28: eb c5 jmp 0xffffffffffffffef
2a:* 0f 0b ud2 <-- trapping instruction
2c: eb a6 jmp 0xffffffffffffffd4
2e: e8 ad 85 ac 00 call 0xac85e0
33: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
3a: 00 00 00 00
3e: 66 data16
3f: 66 data16
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: eb a6 jmp 0xffffffffffffffaa
4: e8 ad 85 ac 00 call 0xac85b6
9: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
10: 00 00 00 00
14: 66 data16
15: 66 data16
[ 49.654574][ T5878] RSP: 0018:ffa000002b207bb0 EFLAGS: 00010246
[ 49.660865][ T5878] RAX: 0000000000000000 RBX: 00000000000041ed RCX: 0000000000000012
[ 49.669066][ T5878] RDX: 0000000000000012 RSI: ff110010866cfec0 RDI: ff11000104c631c0
[ 49.677271][ T5878] RBP: ff110010866cfec0 R08: ffffffff82268900 R09: ff11000104c631c0
[ 49.685392][ T5878] R10: ff110020610bfc80 R11: 00000012d7445f9b R12: ff11000104c631c0
[ 49.693516][ T5878] R13: ffffffff82268900 R14: ffffffff82268840 R15: 0000000000000000
[ 49.701640][ T5878] FS: 00007fcddb229740(0000) GS:ff1100103fb00000(0000) knlGS:0000000000000000
[ 49.710712][ T5878] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 49.717444][ T5878] CR2: 00007fcddb3704e0 CR3: 00000020628e0001 CR4: 0000000000771ee0
[ 49.725566][ T5878] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 49.733686][ T5878] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 49.741807][ T5878] PKRU: 55555554
[ 49.745507][ T5878] Call Trace:
[ 49.748961][ T5878] <TASK>
[ 49.752082][ T5878] eventfs_start_creating (fs/tracefs/inode.c:519)
[ 49.757416][ T5878] eventfs_create_dir (fs/tracefs/event_inode.c:187 (discriminator 3))
[ 49.762488][ T5878] eventfs_root_lookup (fs/tracefs/event_inode.c:291)
[ 49.767637][ T5878] __lookup_slow (fs/namei.c:1686)
[ 49.772268][ T5878] walk_component (include/linux/fs.h:773 fs/namei.c:1704 fs/namei.c:1994)
[ 49.777016][ T5878] link_path_walk+0x24e/0x3b0
[ 49.783462][ T5878] ? path_init (fs/namei.c:2387)
[ 49.788021][ T5878] path_openat (fs/namei.c:3711)
[ 49.792463][ T5878] do_filp_open (fs/namei.c:3742)
[ 49.797021][ T5878] ? __check_object_size (mm/memremap.c:107 mm/memremap.c:144)
[ 49.803055][ T5878] do_sys_openat2 (fs/open.c:1348)
[ 49.807740][ T5878] __x64_sys_openat (fs/open.c:1375)
[ 49.812512][ T5878] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
[ 49.817068][ T5878] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)
[ 49.823092][ T5878] RIP: 0033:0x7fcddb3b84e7
[ 49.827584][ T5878] Code: 25 00 00 41 00 3d 00 00 41 00 74 47 64 8b 04 25 18 00 00 00 85 c0 75 6b 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 95 00 00 00 48 8b 4c 24 28 64 48 2b 0c 25
All code
========
0: 25 00 00 41 00 and $0x410000,%eax
5: 3d 00 00 41 00 cmp $0x410000,%eax
a: 74 47 je 0x53
c: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax
13: 00
14: 85 c0 test %eax,%eax
16: 75 6b jne 0x83
18: 44 89 e2 mov %r12d,%edx
1b: 48 89 ee mov %rbp,%rsi
1e: bf 9c ff ff ff mov $0xffffff9c,%edi
23: b8 01 01 00 00 mov $0x101,%eax
28: 0f 05 syscall
2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction
30: 0f 87 95 00 00 00 ja 0xcb
36: 48 8b 4c 24 28 mov 0x28(%rsp),%rcx
3b: 64 fs
3c: 48 rex.W
3d: 2b .byte 0x2b
3e: 0c 25 or $0x25,%al
Code starting with the faulting instruction
===========================================
0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
6: 0f 87 95 00 00 00 ja 0xa1
c: 48 8b 4c 24 28 mov 0x28(%rsp),%rcx
11: 64 fs
12: 48 rex.W
13: 2b .byte 0x2b
14: 0c 25 or $0x25,%al
[ 49.847467][ T5878] RSP: 002b:00007ffd43974260 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[ 49.855986][ T5878] RAX: ffffffffffffffda RBX: 00007ffd439743f0 RCX: 00007fcddb3b84e7
[ 49.864089][ T5878] RDX: 0000000000000241 RSI: 00007ffd43976470 RDI: 00000000ffffff9c
[ 49.872145][ T5878] RBP: 00007ffd43976470 R08: 00000000ffffffff R09: 00007ffd43974190
[ 49.880191][ T5878] R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000000241
[ 49.888227][ T5878] R13: 00007ffd43974360 R14: 00007ffd43977630 R15: 00007ffd43976470
[ 49.896273][ T5878] </TASK>
[ 49.899371][ T5878] ---[ end trace 0000000000000000 ]---
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
sudo bin/lkp install job.yaml # job file is attached in this email
bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
sudo bin/lkp run generated-yaml-file
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
View attachment "config-6.3.0-rc1-00033-g2fe2002efb23" of type "text/plain" (157043 bytes)
View attachment "job-script" of type "text/plain" (7933 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (51444 bytes)
View attachment "stress-ng" of type "text/plain" (27010 bytes)
View attachment "job.yaml" of type "text/plain" (5599 bytes)
View attachment "reproduce" of type "text/plain" (340 bytes)
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