mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-28 05:12:49 +00:00
Code Issues Releases Wiki Activity

xfrm: Fix infinite loop in xfrm_get_dst_nexthop with transport mode.

Browse source 
On transport mode we forget to fetch the child dst_entry
before we continue the while loop, this leads to an infinite
loop. Fix this by fetching the child dst_entry before we
continue the while loop.

Fixes: 0f6c480f23 ("xfrm: Move dst->path into struct xfrm_dst")
Reported-by: syzbot+7d03c810e50aaedef98a@syzkaller.appspotmail.com
Tested-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Steffen Klassert 2018-02-19 07:44:07 +01:00
parent 143a4454da
commit 013cb81e89
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
net/xfrm/xfrm_policy.c
View file

@ -2732,14 +2732,14 @@ static const void *xfrm_get_dst_nexthop(const struct dst_entry *dst,
while (dst->xfrm) {
const struct xfrm_state *xfrm = dst->xfrm;
dst = xfrm_dst_child(dst);
if (xfrm->props.mode == XFRM_MODE_TRANSPORT)
continue;
if (xfrm->type->flags & XFRM_TYPE_REMOTE_COADDR)
daddr = xfrm->coaddr;
else if (!(xfrm->type->flags & XFRM_TYPE_LOCAL_COADDR))
daddr = &xfrm->id.daddr;
dst = xfrm_dst_child(dst);
}
return daddr;
}