Messages in this thread | | | Subject | Re: [PATCH bpf v7 0/2] Fix bpf_probe_read_user_str() overcopying | From | patchwork-bot+netdevbpf@kernel ... | Date | Thu, 19 Nov 2020 19:00:05 +0000 |
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Hello:
This series was applied to bpf/bpf.git (refs/heads/master):
On Tue, 17 Nov 2020 12:05:44 -0800 you wrote: > 6ae08ae3dea2 ("bpf: Add probe_read_{user, kernel} and probe_read_{user, > kernel}_str helpers") introduced a subtle bug where > bpf_probe_read_user_str() would potentially copy a few extra bytes after > the NUL terminator. > > This issue is particularly nefarious when strings are used as map keys, > as seemingly identical strings can occupy multiple entries in a map. > > [...]
Here is the summary with links: - [bpf,v7,1/2] lib/strncpy_from_user.c: Don't overcopy bytes after NUL terminator https://git.kernel.org/bpf/bpf/c/33b97ea52713 - [bpf,v7,2/2] selftest/bpf: Test bpf_probe_read_user_str() strips trailing bytes after NUL https://git.kernel.org/bpf/bpf/c/a8005439fc81
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