Florian Westphal dd648bd1b3 netfilter: nf_queue: fix possible use-after-free
commit c3873070247d9e3c7a6b0cf9bf9b45e8018427b1 upstream.

Eric Dumazet says:
  The sock_hold() side seems suspect, because there is no guarantee
  that sk_refcnt is not already 0.

On failure, we cannot queue the packet and need to indicate an
error.  The packet will be dropped by the caller.

v2: split skb prefetch hunk into separate change

Fixes: 271b72c7fa82c ("udp: RCU handling for Unicast packets.")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-03-08 19:12:45 +01:00
..
2021-07-01 13:19:48 -07:00
2021-06-11 13:32:46 -07:00
2019-01-23 11:18:00 -08:00
2021-07-29 12:18:11 +01:00
2020-05-05 13:23:29 -07:00
2019-12-09 10:36:44 -08:00
2020-06-22 21:12:44 -07:00
2021-07-27 20:11:44 +01:00
2021-07-27 13:05:56 +01:00
2021-10-18 13:47:09 +01:00
2019-12-09 10:36:44 -08:00
2020-03-04 13:25:55 -08:00
2021-05-17 15:29:35 -07:00
2021-08-04 10:01:26 +01:00
2019-04-22 21:47:25 -07:00
2019-10-05 16:29:00 -07:00
2021-08-03 13:05:26 +01:00
2020-06-18 20:46:23 -07:00
2019-12-09 10:28:43 -08:00