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| author | Eric Dumazet <edumazet@google.com> | 2012-12-06 17:54:59 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-12-07 23:39:29 +0400 |
| commit | c3c7c254b2e8cd99b0adf288c2a1bddacd7ba255 (patch) | |
| tree | cca25bcae0cc6172a616335041c1e54a33db451c /include/linux/netdevice.h | |
| parent | 93b174ad71b08e504c2cf6e8a58ecce778b77a40 (diff) | |
| download | linux-c3c7c254b2e8cd99b0adf288c2a1bddacd7ba255.tar.xz | |
net: gro: fix possible panic in skb_gro_receive()
commit 2e71a6f8084e (net: gro: selective flush of packets) added
a bug for skbs using frag_list. This part of the GRO stack is rarely
used, as it needs skb not using a page fragment for their skb->head.
Most drivers do use a page fragment, but some of them use GFP_KERNEL
allocations for the initial fill of their RX ring buffer.
napi_gro_flush() overwrite skb->prev that was used for these skb to
point to the last skb in frag_list.
Fix this using a separate field in struct napi_gro_cb to point to the
last fragment.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index f8eda0276f03..a848ffc327f4 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1488,6 +1488,9 @@ struct napi_gro_cb { /* Used in ipv6_gro_receive() */ int proto; + + /* used in skb_gro_receive() slow path */ + struct sk_buff *last; }; #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) |