Re: [PATCH] net: sockmap: Don't call bpf_prog_put() on NULL pointer

[Alex Dewar]

On 14/10/2020 10:32, Jakub Sitnicki wrote:
> On Mon, Oct 12, 2020 at 07:09 PM CEST, Alex Dewar wrote:
> > If bpf_prog_inc_not_zero() fails for skb_parser, then bpf_prog_put() is
> > called unconditionally on skb_verdict, even though it may be NULL. Fix
> > and tidy up error path.
> >
> > Addresses-Coverity-ID: 1497799: Null pointer dereferences (FORWARD_NULL)
> > Fixes: 743df8b7749f ("bpf, sockmap: Check skb_verdict and skb_parser programs explicitly")
> > Signed-off-by: Alex Dewar <alex.dewar90@xxxxxxxxx>
> > ---
> Note to maintainers: the issue exists only in bpf-next where we have:
>
>    https://lore.kernel.org/bpf/160239294756.8495.5796595770890272219.stgit@john-Precision-5820-Tower/
>
> The patch also looks like it is supposed to be applied on top of the above.
Yes, the patch is based on linux-next.