Hello,
kernel test robot noticed "test-bpf.Tail_call_count_preserved_across_function_calls.fail" on:
commit: f663a03c8e35c5156bad073a4a8f5e673d656e3f ("bpf, x64: Remove tail call detection")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
[test failed on linux-next/master 62c97045b8f720c2eac807a5f38e26c9ed512371]
in testcase: test-bpf
version:
with following parameters:
test: non-jit
compiler: gcc-13
test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-10980XE CPU @ 3.00GHz (Cascade Lake) 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/202406251415.c51865bc-oliver.sang@xxxxxxxxx
[ 43.913560] test_bpf: #0 Tail call leaf jited:1 5 PASS
[ 43.913572] test_bpf: #1 Tail call 2 jited:1 ret -1 != 3 FAIL
[ 43.914138] test_bpf: #2 Tail call 3 jited:1 ret -1 != 6 FAIL
[ 43.914756] test_bpf: #3 Tail call 4 jited:1 ret -1 != 10 FAIL
[ 43.915374] test_bpf: #4 Tail call load/store leaf jited:1 5 PASS
[ 43.915993] test_bpf: #5 Tail call load/store jited:1 ret -1 != 0 FAIL
[ 43.916636] test_bpf: #6 Tail call error path, max count reached jited:1 ret 1000 != 34000 FAIL
[ 43.917319] test_bpf: #7 Tail call count preserved across function calls jited:1 ret 1000 != 34000 FAIL
[ 43.918799] test_bpf: #8 Tail call error path, NULL target jited:1 5 PASS
[ 43.919720] test_bpf: #9 Tail call error path, index out of range jited:1 5 PASS
[ 43.920474] test_bpf: test_tail_calls: Summary: 4 PASSED, 6 FAILED, [10/10 JIT'ed]
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240625/202406251415.c51865bc-oliver.sang@xxxxxxxxx
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0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
