summaryrefslogtreecommitdiff
path: root/net/xfrm
diff options
context:
space:
mode:
authorHerbert Xu <herbert@gondor.apana.org.au>2017-11-10 14:14:06 +1100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-12-14 09:28:24 +0100
commit6ceabde6664331f096462ff8fcb6f79f303a78ce (patch)
tree99529ef1ee88afe96796d88bf68ad9c98a0c876b /net/xfrm
parent74b470ce478a69bb3ce36b38e6c834d0578c3195 (diff)
xfrm: Copy policy family in clone_policy
[ Upstream commit 0e74aa1d79a5bbc663e03a2804399cae418a0321 ] The syzbot found an ancient bug in the IPsec code. When we cloned a socket policy (for example, for a child TCP socket derived from a listening socket), we did not copy the family field. This results in a live policy with a zero family field. This triggers a BUG_ON check in the af_key code when the cloned policy is retrieved. This patch fixes it by copying the family field over. Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_policy.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 8ce5711ea21b..f19e6a57e118 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1393,6 +1393,7 @@ static struct xfrm_policy *clone_policy(const struct xfrm_policy *old, int dir)
newp->xfrm_nr = old->xfrm_nr;
newp->index = old->index;
newp->type = old->type;
+ newp->family = old->family;
memcpy(newp->xfrm_vec, old->xfrm_vec,
newp->xfrm_nr*sizeof(struct xfrm_tmpl));
spin_lock_bh(&net->xfrm.xfrm_policy_lock);