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authorMatthew Daley <mattjd@gmail.com>2011-10-14 22:45:04 +0400
committerDavid S. Miller <davem@davemloft.net>2011-10-18 03:31:39 +0400
commitcb101ed2c3c7c0224d16953fe77bfb9d6c2cb9df (patch)
tree3d266ac18673ebc85a99e4d10d8d381ff1ebd782 /net/nfc
parentc7fd0d48bde943e228e9c28ce971a22d6a1744c4 (diff)
downloadlinux-cb101ed2c3c7c0224d16953fe77bfb9d6c2cb9df.tar.xz
x25: Handle undersized/fragmented skbs
There are multiple locations in the X.25 packet layer where a skb is assumed to be of at least a certain size and that all its data is currently available at skb->data. These assumptions are not checked, hence buffer overreads may occur. Use pskb_may_pull to check these minimal size assumptions and ensure that data is available at skb->data when necessary, as well as use skb_copy_bits where needed. Signed-off-by: Matthew Daley <mattjd@gmail.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Andrew Hendry <andrew.hendry@gmail.com> Cc: stable <stable@kernel.org> Acked-by: Andrew Hendry <andrew.hendry@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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