tun: relax check on eth_get_headlen() return value

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syzkaller hit the WARN() in tun_get_user(), providing skb
with payload in fragments only, and nothing in skb->head

GRO layer is fine with this, so relax the check.

Fixes: 90e33d4594 ("tun: enable napi_gro_frags() for TUN/TAP driver")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric Dumazet 2017-10-17 10:07:44 -07:00 • committed by David S. Miller

parent 22ce97fe49

commit 010f245b9d

1 changed files with 1 additions and 1 deletions

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drivers/net/tun.c

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