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netfilter: nfnetlink: use original skbuff when acking batches 

Since bd678e09dc ("netfilter: nfnetlink: fix splat due to incorrect
socket memory accounting in skbuff clones"), we don't manually attach
the sk to the skbuff clone anymore, so we have to use the original
skbuff from netlink_ack() which needs to access the sk pointer.

Fixes: bd678e09dc ("netfilter: nfnetlink: fix splat due to incorrect socket memory accounting in skbuff clones")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2016-01-24 23:08:39 +01:00
parent d93c6258ee
commit 7c7bdf3599
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/netfilter/nfnetlink.c
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@ -311,14 +311,14 @@ replay:
#endif
{
nfnl_unlock(subsys_id);
netlink_ack(skb, nlh, -EOPNOTSUPP);
netlink_ack(oskb, nlh, -EOPNOTSUPP);
return kfree_skb(skb);
}
}
if (!ss->commit || !ss->abort) {
nfnl_unlock(subsys_id);
netlink_ack(skb, nlh, -EOPNOTSUPP);
netlink_ack(oskb, nlh, -EOPNOTSUPP);
return kfree_skb(skb);
}
@ -406,7 +406,7 @@ ack:
* pointing to the batch header.
*/
nfnl_err_reset(&err_list);
netlink_ack(skb, nlmsg_hdr(oskb), -ENOMEM);
netlink_ack(oskb, nlmsg_hdr(oskb), -ENOMEM);
status |= NFNL_BATCH_FAILURE;
goto done;
}