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(parent: 3b1c314) | patch
net/af_packet: check len when min_header_len equals to 0
authorZhengchao Shao <shaozhengchao@huawei.com>
Wed, 27 Jul 2022 09:33:12 +0000 (17:33 +0800)
committerDavid S. Miller <davem@davemloft.net>
Fri, 29 Jul 2022 11:09:27 +0000 (12:09 +0100)
commitdc633700f00f726e027846a318c5ffeb8deaaeda
tree0f16fddf941cf27b94cc5ba489441b3beef10826tree
parent3b1c31474cb934be352a8d75389bfe04773799c6commit | diff
net/af_packet: check len when min_header_len equals to 0

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: fd1894224407 ("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>
net/packet/af_packet.c diff | blob | history
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