tree 728af98f0cc36df61525fc5958f188d825fc5bc6
parent 025c65e119bf58b610549ca359c9ecc5dee6a8d2
author Steffen Klassert <steffen.klassert@secunet.com> 1551161090 +0100
committer Steffen Klassert <steffen.klassert@secunet.com> 1554185919 +0200

xfrm4: Fix uninitialized memory read in _decode_session4

We currently don't reload pointers pointing into skb header
after doing pskb_may_pull() in _decode_session4(). So in case
pskb_may_pull() changed the pointers, we read from random
memory. Fix this by putting all the needed infos on the
stack, so that we don't need to access the header pointers
after doing pskb_may_pull().

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>