[v5] Fix bpf_strnstr len error

[PATCH bpf-next v5 0/2] Fix bpf_strnstr len error

Rong Tao posted 2 patches 1 month ago

Diff against v3 v4

Only 0 patches received!

kernel/bpf/helpers.c                                     | 9 ++++++++-
.../testing/selftests/bpf/progs/string_kfuncs_success.c  | 8 ++++++--
2 files changed, 14 insertions(+), 3 deletions(-)

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[PATCH bpf-next v5 0/2] Fix bpf_strnstr len error

Posted by Rong Tao 1 month ago

From: Rong Tao <rongtao@cestc.cn>

Fix bpf_strnstr() wrong 'len' parameter, bpf_strnstr("open", "open", 4)
should return 0 instead of -ENOENT. And fix a more general case when s2
is a suffix of the first len characters of s1.

Rong Tao (2):
  bpf/helpers: bpf_strnstr: Exact match length
  selftests/bpf: Add tests for bpf_strnstr

 kernel/bpf/helpers.c                                     | 9 ++++++++-
 .../testing/selftests/bpf/progs/string_kfuncs_success.c  | 8 ++++++--
 2 files changed, 14 insertions(+), 3 deletions(-)

---
v5: Add more commit message and change the patch 0001's comment;
v4: Add comment and more selftests;
    https://lore.kernel.org/all/tencent_CBD40091C14056E8298BE3725B65EE156405@qq.com/
v3: Fix selftests/bpf error in v2, sorry about that;
    https://lore.kernel.org/lkml/tencent_69BD268FBA201219240B51661D5E96A8D80A@qq.com/
v2: Follow Andrii Nakryiko's advise, fix the 'wrong fix';
    https://lore.kernel.org/lkml/tencent_DF4DA83EEBFB9246E5E3357BB40911CCA005@qq.com/
v1: https://lore.kernel.org/lkml/tencent_65E5988AD52BEC280D22964189505CD6ED06@qq.com/
-- 
2.51.0