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bpf/selftests: Test bpf_d_path on rdonly_mem.
authorHao Luo <haoluo@google.com>
Thu, 6 Jan 2022 20:55:25 +0000 (12:55 -0800)
committerAndrii Nakryiko <andrii@kernel.org>
Thu, 6 Jan 2022 23:20:49 +0000 (15:20 -0800)
commit44bab87d8ca6f0544a9f8fc97bdf33aa5b3c899e
treee88c204993400047827074a50eb71bf3e50319bctree | snapshot
parente59618f0f46fa6cf86d5b82380e0f453756b282bcommit | diff
bpf/selftests: Test bpf_d_path on rdonly_mem.

The second parameter of bpf_d_path() can only accept writable
memories. Rdonly_mem obtained from bpf_per_cpu_ptr() can not
be passed into bpf_d_path for modification. This patch adds
a selftest to verify this behavior.

Signed-off-by: Hao Luo <haoluo@google.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20220106205525.2116218-1-haoluo@google.com
tools/testing/selftests/bpf/prog_tests/d_path.c diff | blob | history
tools/testing/selftests/bpf/progs/test_d_path_check_rdonly_mem.c [new file with mode: 0644] blob
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