Hello,
kernel test robot noticed "segfault_at_ip_sp_error" on:
commit: c849d8e404a7b145b33c184042234e903ce72c7c ("[PATCH v2] selftests:
harness: Support KCOV.")
url:
https://github.com/intel-lab-lkp/linux/commits/Kuniyuki-Iwashima/selftests-harness-Support-KCOV/20251028-104538
base: https://git.kernel.org/cgit/linux/kernel/git/shuah/linux-kselftest.git
next
patch link:
https://lore.kernel.org/all/[email protected]/
patch subject: [PATCH v2] selftests: harness: Support KCOV.
in testcase: kernel-selftests
version: kernel-selftests-x86_64-8bb886cb8f3a-1_20251104
with following parameters:
group: syscall_user_dispatch
config: x86_64-rhel-9.4-kselftests
compiler: gcc-14
test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-9980XE CPU @ 3.00GHz
(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 <[email protected]>
| Closes: https://lore.kernel.org/oe-lkp/[email protected]
kern :info : [ 72.507647] [ T2520] sud_test[2520]: segfault at 0 ip
0000558da6f1242c sp 00007fffd6f2faf0 error 4 in
sud_test[342c,558da6f11000+5000] likely on CPU 23 (core 8, socket 0)
kern :info : [ 72.508965] [ T2520] Code: 48 89 e5 48 83 ec 70 48 89 7d 98
48 89 75 90 48 8b 45 98 8b 40 70 83 f8 ff 0f 84 36 02 00 00 48 8b 45 98 48 8b
80 80 00 00 00 <48> 8b 00 89 45 f4 48 8b 45 98 8b 40 74 83 e8 01 39 45 f4 75 1d
48
All code
========
0: 48 89 e5 mov %rsp,%rbp
3: 48 83 ec 70 sub $0x70,%rsp
7: 48 89 7d 98 mov %rdi,-0x68(%rbp)
b: 48 89 75 90 mov %rsi,-0x70(%rbp)
f: 48 8b 45 98 mov -0x68(%rbp),%rax
13: 8b 40 70 mov 0x70(%rax),%eax
16: 83 f8 ff cmp $0xffffffff,%eax
19: 0f 84 36 02 00 00 je 0x255
1f: 48 8b 45 98 mov -0x68(%rbp),%rax
23: 48 8b 80 80 00 00 00 mov 0x80(%rax),%rax
2a:* 48 8b 00 mov (%rax),%rax <-- trapping
instruction
2d: 89 45 f4 mov %eax,-0xc(%rbp)
30: 48 8b 45 98 mov -0x68(%rbp),%rax
34: 8b 40 74 mov 0x74(%rax),%eax
37: 83 e8 01 sub $0x1,%eax
3a: 39 45 f4 cmp %eax,-0xc(%rbp)
3d: 75 1d jne 0x5c
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 8b 00 mov (%rax),%rax
3: 89 45 f4 mov %eax,-0xc(%rbp)
6: 48 8b 45 98 mov -0x68(%rbp),%rax
a: 8b 40 74 mov 0x74(%rax),%eax
d: 83 e8 01 sub $0x1,%eax
10: 39 45 f4 cmp %eax,-0xc(%rbp)
13: 75 1d jne 0x32
15: 48 rex.W
kern :info : [ 72.511780] [ T2521] sud_test[2521]: segfault at 0 ip
0000558da6f1242c sp 00007fffd6f2faf0 error 4 in
sud_test[342c,558da6f11000+5000] likely on CPU 23 (core 8, socket 0)
kern :info : [ 72.513080] [ T2521] Code: 48 89 e5 48 83 ec 70 48 89 7d 98
48 89 75 90 48 8b 45 98 8b 40 70 83 f8 ff 0f 84 36 02 00 00 48 8b 45 98 48 8b
80 80 00 00 00 <48> 8b 00 89 45 f4 48 8b 45 98 8b 40 74 83 e8 01 39 45 f4 75 1d
48
All code
========
0: 48 89 e5 mov %rsp,%rbp
3: 48 83 ec 70 sub $0x70,%rsp
7: 48 89 7d 98 mov %rdi,-0x68(%rbp)
b: 48 89 75 90 mov %rsi,-0x70(%rbp)
f: 48 8b 45 98 mov -0x68(%rbp),%rax
13: 8b 40 70 mov 0x70(%rax),%eax
16: 83 f8 ff cmp $0xffffffff,%eax
19: 0f 84 36 02 00 00 je 0x255
1f: 48 8b 45 98 mov -0x68(%rbp),%rax
23: 48 8b 80 80 00 00 00 mov 0x80(%rax),%rax
2a:* 48 8b 00 mov (%rax),%rax <-- trapping
instruction
2d: 89 45 f4 mov %eax,-0xc(%rbp)
30: 48 8b 45 98 mov -0x68(%rbp),%rax
34: 8b 40 74 mov 0x74(%rax),%eax
37: 83 e8 01 sub $0x1,%eax
3a: 39 45 f4 cmp %eax,-0xc(%rbp)
3d: 75 1d jne 0x5c
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 8b 00 mov (%rax),%rax
3: 89 45 f4 mov %eax,-0xc(%rbp)
6: 48 8b 45 98 mov -0x68(%rbp),%rax
a: 8b 40 74 mov 0x74(%rax),%eax
d: 83 e8 01 sub $0x1,%eax
10: 39 45 f4 cmp %eax,-0xc(%rbp)
13: 75 1d jne 0x32
15: 48 rex.W
user :notice: [ 72.516773] [ T622] update-alternatives: warning: skip
creation of /usr/share/man/man1/traceroute6.1.gz because associated file
/usr/share/man/man1/traceroute6.db.1.gz (of link group traceroute6) doesn't
exist
kern :info : [ 72.517057] [ T2523] sud_test[2523]: segfault at 0 ip
0000558da6f1242c sp 00007fffd6f2faf0 error 4 in
sud_test[342c,558da6f11000+5000] likely on CPU 27 (core 16, socket 0)
kern :info : [ 72.519874] [ T2523] Code: 48 89 e5 48 83 ec 70 48 89 7d 98
48 89 75 90 48 8b 45 98 8b 40 70 83 f8 ff 0f 84 36 02 00 00 48 8b 45 98 48 8b
80 80 00 00 00 <48> 8b 00 89 45 f4 48 8b 45 98 8b 40 74 83 e8 01 39 45 f4 75 1d
48
All code
========
0: 48 89 e5 mov %rsp,%rbp
3: 48 83 ec 70 sub $0x70,%rsp
7: 48 89 7d 98 mov %rdi,-0x68(%rbp)
b: 48 89 75 90 mov %rsi,-0x70(%rbp)
f: 48 8b 45 98 mov -0x68(%rbp),%rax
13: 8b 40 70 mov 0x70(%rax),%eax
16: 83 f8 ff cmp $0xffffffff,%eax
19: 0f 84 36 02 00 00 je 0x255
1f: 48 8b 45 98 mov -0x68(%rbp),%rax
23: 48 8b 80 80 00 00 00 mov 0x80(%rax),%rax
2a:* 48 8b 00 mov (%rax),%rax <-- trapping
instruction
2d: 89 45 f4 mov %eax,-0xc(%rbp)
30: 48 8b 45 98 mov -0x68(%rbp),%rax
34: 8b 40 74 mov 0x74(%rax),%eax
37: 83 e8 01 sub $0x1,%eax
3a: 39 45 f4 cmp %eax,-0xc(%rbp)
3d: 75 1d jne 0x5c
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 8b 00 mov (%rax),%rax
3: 89 45 f4 mov %eax,-0xc(%rbp)
6: 48 8b 45 98 mov -0x68(%rbp),%rax
a: 8b 40 74 mov 0x74(%rax),%eax
d: 83 e8 01 sub $0x1,%eax
10: 39 45 f4 cmp %eax,-0xc(%rbp)
13: 75 1d jne 0x32
15: 48 rex.W
user :notice: [ 72.521352] [ T622] update-alternatives: warning: skip
creation of /usr/share/man/man1/lft.1.gz because associated file
/usr/share/man/man1/lft.db.1.gz (of link group lft) doesn't exist
kern :info : [ 72.522679] [ T2524] sud_test[2524]: segfault at 0 ip
0000558da6f1242c sp 00007fffd6f2faf0 error 4 in
sud_test[342c,558da6f11000+5000] likely on CPU 23 (core 8, socket 0)
kern :info : [ 72.524467] [ T2524] Code: 48 89 e5 48 83 ec 70 48 89 7d 98
48 89 75 90 48 8b 45 98 8b 40 70 83 f8 ff 0f 84 36 02 00 00 48 8b 45 98 48 8b
80 80 00 00 00 <48> 8b 00 89 45 f4 48 8b 45 98 8b 40 74 83 e8 01 39 45 f4 75 1d
48
All code
========
0: 48 89 e5 mov %rsp,%rbp
3: 48 83 ec 70 sub $0x70,%rsp
7: 48 89 7d 98 mov %rdi,-0x68(%rbp)
b: 48 89 75 90 mov %rsi,-0x70(%rbp)
f: 48 8b 45 98 mov -0x68(%rbp),%rax
13: 8b 40 70 mov 0x70(%rax),%eax
16: 83 f8 ff cmp $0xffffffff,%eax
19: 0f 84 36 02 00 00 je 0x255
1f: 48 8b 45 98 mov -0x68(%rbp),%rax
23: 48 8b 80 80 00 00 00 mov 0x80(%rax),%rax
2a:* 48 8b 00 mov (%rax),%rax <-- trapping
instruction
2d: 89 45 f4 mov %eax,-0xc(%rbp)
30: 48 8b 45 98 mov -0x68(%rbp),%rax
34: 8b 40 74 mov 0x74(%rax),%eax
37: 83 e8 01 sub $0x1,%eax
3a: 39 45 f4 cmp %eax,-0xc(%rbp)
3d: 75 1d jne 0x5c
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 8b 00 mov (%rax),%rax
3: 89 45 f4 mov %eax,-0xc(%rbp)
6: 48 8b 45 98 mov -0x68(%rbp),%rax
a: 8b 40 74 mov 0x74(%rax),%eax
d: 83 e8 01 sub $0x1,%eax
10: 39 45 f4 cmp %eax,-0xc(%rbp)
13: 75 1d jne 0x32
15: 48 rex.W
user :notice: [ 72.526246] [ T622] update-alternatives: warning: skip
creation of /usr/share/man/man1/traceproto.1.gz because associated file
/usr/share/man/man1/traceproto.db.1.gz (of link group traceproto) doesn't exist
kern :info : [ 72.529475] [ T2525] sud_test[2525]: segfault at 0 ip
0000558da6f1242c sp 00007fffd6f2faf0 error 4 in
sud_test[342c,558da6f11000+5000] likely on CPU 16 (core 26, socket 0)
kern :info : [ 72.530789] [ T2525] Code: 48 89 e5 48 83 ec 70 48 89 7d 98
48 89 75 90 48 8b 45 98 8b 40 70 83 f8 ff 0f 84 36 02 00 00 48 8b 45 98 48 8b
80 80 00 00 00 <48> 8b 00 89 45 f4 48 8b 45 98 8b 40 74 83 e8 01 39 45 f4 75 1d
48
All code
========
0: 48 89 e5 mov %rsp,%rbp
3: 48 83 ec 70 sub $0x70,%rsp
7: 48 89 7d 98 mov %rdi,-0x68(%rbp)
b: 48 89 75 90 mov %rsi,-0x70(%rbp)
f: 48 8b 45 98 mov -0x68(%rbp),%rax
13: 8b 40 70 mov 0x70(%rax),%eax
16: 83 f8 ff cmp $0xffffffff,%eax
19: 0f 84 36 02 00 00 je 0x255
1f: 48 8b 45 98 mov -0x68(%rbp),%rax
23: 48 8b 80 80 00 00 00 mov 0x80(%rax),%rax
2a:* 48 8b 00 mov (%rax),%rax <-- trapping
instruction
2d: 89 45 f4 mov %eax,-0xc(%rbp)
30: 48 8b 45 98 mov -0x68(%rbp),%rax
34: 8b 40 74 mov 0x74(%rax),%eax
37: 83 e8 01 sub $0x1,%eax
3a: 39 45 f4 cmp %eax,-0xc(%rbp)
3d: 75 1d jne 0x5c
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 8b 00 mov (%rax),%rax
3: 89 45 f4 mov %eax,-0xc(%rbp)
6: 48 8b 45 98 mov -0x68(%rbp),%rax
a: 8b 40 74 mov 0x74(%rax),%eax
d: 83 e8 01 sub $0x1,%eax
10: 39 45 f4 cmp %eax,-0xc(%rbp)
13: 75 1d jne 0x32
15: 48 rex.W
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20251106/[email protected]
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
