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.... v3: Fix selftests/bpf error in v2, sorry about that; https://lore.kernel.org/lkml/tencent_69BD268FBA201219240B51661D5E96A8D80A@qq... v2: Follow Andrii Nakryiko's advise, fix the 'wrong fix'; https://lore.kernel.org/lkml/tencent_DF4DA83EEBFB9246E5E3357BB40911CCA005@qq... v1: https://lore.kernel.org/lkml/tencent_65E5988AD52BEC280D22964189505CD6ED06@qq...