]> git.baikalelectronics.ru Git - kernel.git/commit
netfilter: seqadj: re-load tcp header pointer after possible head reallocation
authorFlorian Westphal <fw@strlen.de>
Wed, 5 Dec 2018 13:12:19 +0000 (14:12 +0100)
committerPablo Neira Ayuso <pablo@netfilter.org>
Fri, 7 Dec 2018 09:54:23 +0000 (10:54 +0100)
commit640499ebfacf9d58fdb4e4c9e171d4b42b8239cf
treeb5c4a153bc83e2743efd284e02b0e024aa5a51c7
parent85c658c857597ed26758bbe4f36e8ee01579fda8
netfilter: seqadj: re-load tcp header pointer after possible head reallocation

When adjusting sack block sequence numbers, skb_make_writable() gets
called to make sure tcp options are all in the linear area, and buffer
is not shared.

This can cause tcp header pointer to get reallocated, so we must
reaload it to avoid memory corruption.

This bug pre-dates git history.

Reported-by: Neel Mehta <nmehta@google.com>
Reported-by: Shane Huntley <shuntley@google.com>
Reported-by: Heather Adkins <argv@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
net/netfilter/nf_conntrack_seqadj.c