Hello:
This series was applied to bpf/bpf.git (refs/heads/master):
On Thu, 5 Nov 2020 16:06:34 -0800 you wrote:
> do_strncpy_from_user() may copy some extra bytes after the NUL
> terminator into the destination buffer. This usually does not matter for
> normal string operations. However, when BPF programs key BPF maps with
> strings, this matters a lot.
>
> A BPF program may read strings from user memory by calling the
> bpf_probe_read_user_str() helper which eventually calls
> do_strncpy_from_user(). The program can then key a map with the
> resulting string. BPF map keys are fixed-width and string-agnostic,
> meaning that map keys are treated as a set of bytes.
>
> [...]
Here is the summary with links:
- [bpf,v4,1/2] lib/strncpy_from_user.c: Don't overcopy bytes after NUL
terminator
https://git.kernel.org/bpf/bpf/c/baca7f1c1c1e
- [bpf,v4,2/2] selftest/bpf: Test bpf_probe_read_user_str() strips trailing
bytes after NUL
https://git.kernel.org/bpf/bpf/c/d18b184127de
You are awesome, thank you!
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