Re: [PATCH] ppp: fix out-of-bounds access in bpf_prog_create()

[Arnd Bergmann <arnd@xxxxxxxx>]

On Thu, Dec 5, 2019 at 6:55 AM Eric Biggers <ebiggers@xxxxxxxxxx> wrote:
>
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
>
> sock_fprog_kern::len is in units of struct sock_filter, not bytes.
>
> Fixes: 3e859adf3643 ("compat_ioctl: unify copy-in of ppp filters")
> Reported-by: syzbot+eb853b51b10f1befa0b7@xxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>

Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>

Thanks for fixing the bug I introduced!