]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
net: test tailroom before appending to linear skb
authorWillem de Bruijn <willemb@google.com>
Thu, 17 May 2018 17:13:29 +0000 (13:13 -0400)
committerDavid S. Miller <davem@davemloft.net>
Thu, 17 May 2018 21:05:01 +0000 (17:05 -0400)
commit113f99c3358564a0647d444c2ae34e8b1abfd5b9
tree9f8a2ef799de5be76bb83fb73524b2575a5759af
parent374edea4aaedb92964d35f68318c094b6d5c0f63
net: test tailroom before appending to linear skb

Device features may change during transmission. In particular with
corking, a device may toggle scatter-gather in between allocating
and writing to an skb.

Do not unconditionally assume that !NETIF_F_SG at write time implies
that the same held at alloc time and thus the skb has sufficient
tailroom.

This issue predates git history.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/ip_output.c
net/ipv6/ip6_output.c