[NETFILTER]: {ip,ip6,nfnetlink}_queue: fix SKB_LINEAR_ASSERT when mangling packet data

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As reported by Tomas Simonaitis <tomas.simonaitis@gmail.com>,
inserting new data in skbs queued over {ip,ip6,nfnetlink}_queue
triggers a SKB_LINEAR_ASSERT in skb_put().

Going back through the git history, it seems this bug is present since
at least 2.6.12-rc2, probably even since the removal of
skb_linearize() for netfilter.

Linearize non-linear skbs through skb_copy_expand() when enlarging
them.  Tested by Thomas, fixes bugzilla #9933.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Patrick McHardy 2008-02-19 17:17:52 -08:00 • committed by David S. Miller

parent 94cb1503c7

commit e2b58a67b9

3 changed files with 19 additions and 13 deletions

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12

net/ipv4/netfilter/ip_queue.c

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10

net/ipv6/netfilter/ip6_queue.c

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10

net/netfilter/nfnetlink_queue.c

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