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e1ef78dce9
On ARM64 the stack pointer should be aligned at a 16 byte boundary or
the SPAlignmentFault can occur. The fexit_sleep selftest allocates the
stack for the child process as a character array, this is not guaranteed
to be aligned at 16 bytes.
Because of the SPAlignmentFault, the child process is killed before it
can do the nanosleep call and hence fentry_cnt remains as 0. This causes
the main thread to hang on the following line:
while (READ_ONCE(fexit_skel->bss->fentry_cnt) != 2);
Fix this by allocating the stack using mmap() as described in the
example in the man page of clone().
Remove the fexit_sleep test from the DENYLIST of arm64.
Fixes: eddbe8e652 ("selftest/bpf: Add a test to check trampoline freeing logic.")
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240715173327.8657-1-puranjay@kernel.org
13 lines
1.3 KiB
Plaintext
13 lines
1.3 KiB
Plaintext
bpf_cookie/multi_kprobe_attach_api # kprobe_multi_link_api_subtest:FAIL:fentry_raw_skel_load unexpected error: -3
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bpf_cookie/multi_kprobe_link_api # kprobe_multi_link_api_subtest:FAIL:fentry_raw_skel_load unexpected error: -3
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kprobe_multi_bench_attach # needs CONFIG_FPROBE
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kprobe_multi_test # needs CONFIG_FPROBE
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module_attach # prog 'kprobe_multi': failed to auto-attach: -95
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fentry_test/fentry_many_args # fentry_many_args:FAIL:fentry_many_args_attach unexpected error: -524
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fexit_test/fexit_many_args # fexit_many_args:FAIL:fexit_many_args_attach unexpected error: -524
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tracing_struct/struct_many_args # struct_many_args:FAIL:tracing_struct_many_args__attach unexpected error: -524
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fill_link_info/kprobe_multi_link_info # bpf_program__attach_kprobe_multi_opts unexpected error: -95
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fill_link_info/kretprobe_multi_link_info # bpf_program__attach_kprobe_multi_opts unexpected error: -95
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fill_link_info/kprobe_multi_invalid_ubuff # bpf_program__attach_kprobe_multi_opts unexpected error: -95
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missed/kprobe_recursion # missed_kprobe_recursion__attach unexpected error: -95 (errno 95)
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