path: root/drivers/net/xen-netback/netback.c
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authorHerbert Xu <herbert@gondor.apana.org.au>2015-08-04 15:42:47 +0800
committerDavid S. Miller <davem@davemloft.net>2015-08-06 21:55:47 -0700
commita0a2a6602496a45ae838a96db8b8173794b5d398 (patch)
tree5508d9f02066c30854b0c88b82fffc03c857adef /drivers/net/xen-netback/netback.c
parentnet: fec: fix initial runtime PM refcount (diff)
net: Fix skb_set_peeked use-after-free bug
The commit 738ac1ebb96d02e0d23bc320302a6ea94c612dec ("net: Clone skb before setting peeked flag") introduced a use-after-free bug in skb_recv_datagram. This is because skb_set_peeked may create a new skb and free the existing one. As it stands the caller will continue to use the old freed skb. This patch fixes it by making skb_set_peeked return the new skb (or the old one if unchanged). Fixes: 738ac1ebb96d ("net: Clone skb before setting peeked flag") Reported-by: Brenden Blanco <bblanco@plumgrid.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Brenden Blanco <bblanco@plumgrid.com> Reviewed-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netback/netback.c')
0 files changed, 0 insertions, 0 deletions