Re: [PATCH bpf v4 1/2] lib/strncpy_from_user.c: Don't overcopy bytes after NUL terminator

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

Re: [PATCH bpf v4 1/2] lib/strncpy_from_user.c: Don't overcopy bytes after NUL terminator

> On Nov 5, 2020, at 4:06 PM, Daniel Xu 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.

[PATCH bpf v4 1/2] lib/strncpy_from_user.c: Don't overcopy bytes after NUL terminator

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