net/af_packet: check len when min_header_len equals to 0

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User can use AF_PACKET socket to send packets with the length of 0.
When min_header_len equals to 0, packet_snd will call __dev_queue_xmit
to send packets, and sock->type can be any type.

Reported-by: syzbot+5ea725c25d06fb9114c4@syzkaller.appspotmail.com
Fixes: fd18942244 ("bpf: Don't redirect packets with invalid pkt_len")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Zhengchao Shao 2022-07-27 17:33:12 +08:00 • committed by David S. Miller

parent 3b1c31474c

commit dc633700f0

1 changed files with 2 additions and 2 deletions

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net/packet/af_packet.c

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