Re: [PATCH bpf-next 1/2] bpf: add bpf_init_inode_xattr kfunc for atomic inode labeling

On Sun, Apr 26, 2026 at 8:56 PM <[email protected]> wrote:
>
...
>
> Can this result in a use-after-free of the name string? The name__str
> argument typically resides in a BPF map.
>
> Since the filesystem's initxattrs callback can perform disk I/O and sleep
> after the BPF hook completes, what happens if the BPF program is unloaded
> and its maps are freed concurrently?
>
> The name pointer might then point to freed memory when the filesystem
> attempts to write the xattr.
>

Yeah, good point. We'll kmemdup the name just as we're already doing
for the value.