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| author | Eric Dumazet <edumazet@google.com> | 2013-03-27 22:28:41 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-05 21:16:53 +0400 |
| commit | 5a37b9a3f61eced85a8398250f2fc89dbfdf1a10 (patch) | |
| tree | 3a4c840e5a755cd7210aea001ff618423c854d5b /drivers | |
| parent | 92a33e58656098d3dbf538b3c1c86e6fcfbccb6c (diff) | |
| download | linux-5a37b9a3f61eced85a8398250f2fc89dbfdf1a10.tar.xz | |
aoe: reserve enough headroom on skbs
[ Upstream commit 91c5746425aed8f7188a351f1224a26aa232e4b3 ]
Some network drivers use a non default hard_header_len
Transmitted skb should take into account dev->hard_header_len, or risk
crashes or expensive reallocations.
In the case of aoe, lets reserve MAX_HEADER bytes.
David reported a crash in defxx driver, solved by this patch.
Reported-by: David Oostdyk <daveo@ll.mit.edu>
Tested-by: David Oostdyk <daveo@ll.mit.edu>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Ed Cashin <ecashin@coraid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/aoe/aoecmd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c index 887f68f6d79a..db30542b122d 100644 --- a/drivers/block/aoe/aoecmd.c +++ b/drivers/block/aoe/aoecmd.c @@ -30,8 +30,9 @@ new_skb(ulong len) { struct sk_buff *skb; - skb = alloc_skb(len, GFP_ATOMIC); + skb = alloc_skb(len + MAX_HEADER, GFP_ATOMIC); if (skb) { + skb_reserve(skb, MAX_HEADER); skb_reset_mac_header(skb); skb_reset_network_header(skb); skb->protocol = __constant_htons(ETH_P_AOE); |