Files
linux/include/linux
Zhengchao Shao fd18942244 bpf: Don't redirect packets with invalid pkt_len
Syzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any
skbs, that is, the flow->head is null.
The root cause, as the [2] says, is because that bpf_prog_test_run_skb()
run a bpf prog which redirects empty skbs.
So we should determine whether the length of the packet modified by bpf
prog or others like bpf_prog_test is valid before forwarding it directly.

LINK: [1] https://syzkaller.appspot.com/bug?id=0b84da80c2917757915afa89f7738a9d16ec96c5
LINK: [2] https://www.spinics.net/lists/netdev/msg777503.html

Reported-by: syzbot+7a12909485b94426aceb@syzkaller.appspotmail.com
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/r/20220715115559.139691-1-shaozhengchao@huawei.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-07-19 09:50:54 -07:00
..
2022-05-10 16:03:52 +08:00
2022-04-20 12:59:50 +05:30
2022-05-22 20:44:29 +01:00
2022-03-23 19:58:38 +01:00
2022-02-01 14:25:50 +02:00
2022-01-22 08:33:34 +02:00
2022-06-08 14:04:14 -04:00
2022-06-29 13:21:51 -07:00
2022-06-29 13:21:51 -07:00
2022-06-07 10:20:42 -07:00
2022-03-11 19:15:03 -08:00
2022-04-22 12:32:03 +02:00
2022-03-15 10:32:44 +01:00
2022-05-16 13:37:59 -07:00
2022-06-28 10:37:25 -03:00
2022-06-03 06:52:57 -07:00
2022-05-13 07:20:18 -07:00
2022-01-20 08:52:54 +02:00
2022-03-02 22:44:49 -08:00
2022-06-09 21:53:09 -07:00
2022-06-09 21:53:12 -07:00
2022-06-09 21:53:09 -07:00
2022-02-28 23:26:27 -08:00
2022-02-19 19:23:53 -08:00
2022-02-14 15:43:15 +01:00
2022-03-18 09:47:04 +01:00
2022-05-02 14:06:20 -06:00
2022-06-06 09:52:17 +09:00
2022-01-27 13:53:26 +00:00
2022-05-03 16:09:03 -04:00
2022-04-21 07:36:56 -04:00
2022-05-19 14:08:53 -07:00
2022-03-21 12:57:38 -04:00
2022-05-13 07:20:17 -07:00
2022-06-19 10:38:26 +01:00
2022-04-28 23:16:14 -07:00
2022-05-12 10:29:41 -07:00
2022-04-28 16:31:10 +02:00
2022-05-17 13:32:46 -04:00
2022-02-09 09:24:40 -05:00
2022-01-12 10:14:09 -06:00
2022-02-02 07:49:59 -07:00
2022-02-09 08:04:44 +01:00
2022-02-09 08:04:44 +01:00
2022-04-05 10:24:38 +02:00
2022-04-19 10:19:02 -07:00
2022-01-22 08:33:37 +02:00
2022-01-08 12:43:57 -06:00
2022-01-24 14:45:02 +01:00
2022-06-10 11:29:48 +02:00
2022-03-08 14:33:36 -06:00
2022-03-17 20:16:29 -07:00
2022-03-23 19:58:41 +01:00
2022-05-22 21:03:01 +01:00
2022-04-07 12:53:54 +02:00
2022-02-24 15:04:51 +00:00
2022-06-13 13:47:15 +01:00
2022-05-08 01:33:08 -07:00
2022-02-25 09:36:06 +01:00
2022-04-11 19:18:27 -06:00
2022-03-22 15:57:11 -07:00
2022-01-26 14:54:48 +01:00
2022-01-27 13:53:27 +00:00
2022-05-24 08:41:18 -06:00
2022-05-31 12:45:10 -04:00
2022-06-13 09:54:52 -07:00