bpf/helpers: bpf_strnstr: Exact match length #5843
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strnstr should not treat the ending '\0' of s2 as a matching character,
otherwise the parameter 'len' will be meaningless, for example:
1. bpf_strnstr("openat", "open", 4) = -ENOENT
2. bpf_strnstr("openat", "open", 5) = 0
This patch makes (1) return 0, indicating a successful match.
Signed-off-by: Rong Tao <[email protected]>
Add two tests for bpf_strnstr():
bpf_strnstr("", "", 0) = 0
bpf_strnstr("hello world", "hello", 5) = 0
Signed-off-by: Rong Tao <[email protected]>
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Upstream branch: 737433c |
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Pull request for series with
subject: bpf/helpers: bpf_strnstr: Exact match length
version: 2
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=996304