https://github.com/torvalds/linux
Revision 1bf3751ec90cc3174e01f0d701e8449ce163d113 authored by Johannes Berg on 09 December 2012, 23:41:06 UTC, committed by David S. Miller on 10 December 2012, 18:51:44 UTC
ip_check_defrag() might be called from af_packet within the
RX path where shared SKBs are used, so it must not modify
the input SKB before it has unshared it for defragmentation.
Use skb_copy_bits() to get the IP header and only pull in
everything later.

The same is true for the other caller in macvlan as it is
called from dev->rx_handler which can also get a shared SKB.

Reported-by: Eric Leblond <eric@regit.org>
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 5e1f542
History
Tip revision: 1bf3751ec90cc3174e01f0d701e8449ce163d113 authored by Johannes Berg on 09 December 2012, 23:41:06 UTC
ipv4: ip_check_defrag must not modify skb before unsharing
Tip revision: 1bf3751
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