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4 Commits (09cfd3c52ea76f43b3cb15e570aeddf633d65e80)

Author SHA1 Message Date
Alexei Starovoitov 5d87e96a49 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after rc5 
Cross-merge BPF and other fixes after downstream PR.

No conflicts.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2025-09-11 09:34:37 -07:00
Rong Tao 6624fb2f33 selftests/bpf: Add tests for bpf_strnstr 
Add tests for bpf_strnstr():

    bpf_strnstr("", "", 0) = 0
    bpf_strnstr("hello world", "hello", 5) = 0
    bpf_strnstr(str, "hello", 4) = -ENOENT
    bpf_strnstr("", "a", 0) = -ENOENT

Signed-off-by: Rong Tao <rongtao@cestc.cn>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/tencent_2ED218F8082565C95D86A804BDDA8DBA200A@qq.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2025-09-09 15:07:58 -07:00
Rong Tao abc8a952d4 selftests/bpf: Test kfunc bpf_strcasecmp 
Add testsuites for kfunc bpf_strcasecmp.

Signed-off-by: Rong Tao <rongtao@cestc.cn>
Link: https://lore.kernel.org/r/tencent_81A1A0ACC04B68158C57C4D151C46A832B07@qq.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2025-09-04 09:00:57 -07:00
Viktor Malik e8763fb66a selftests/bpf: Add tests for string kfuncs 
Add both positive and negative tests cases using string kfuncs added in
the previous patches.

Positive tests check that the functions work as expected.

Negative tests pass various incorrect strings to the kfuncs and check
for the expected error codes:
  -E2BIG  when passing too long strings
  -EFAULT when trying to read inaccessible kernel memory
  -ERANGE when passing userspace pointers on arches with non-overlapping
          address spaces

A majority of the tests use the RUN_TESTS helper which executes BPF
programs with BPF_PROG_TEST_RUN and check for the expected return value.
An exception to this are tests for long strings as we need to memset the
long string from userspace (at least I haven't found an ergonomic way to
memset it from a BPF program), which cannot be done using the RUN_TESTS
infrastructure.

Suggested-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Viktor Malik <vmalik@redhat.com>
Link: https://lore.kernel.org/r/090451a2e60c9ae1dceb4d1bfafa3479db5c7481.1750917800.git.vmalik@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2025-06-26 09:44:46 -07:00