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authorHerbert Xu <herbert@gondor.apana.org.au>2017-11-10 06:14:06 +0300
committerSteffen Klassert <steffen.klassert@secunet.com>2017-11-14 09:00:47 +0300
commit0e74aa1d79a5bbc663e03a2804399cae418a0321 (patch)
tree64b09a5e527e0e1d1b51b8eaec8abb9491cfc4f4 /net/xfrm
parentb39545684a90ef3374abc0969d64c7bc540d128d (diff)
downloadlinux-0e74aa1d79a5bbc663e03a2804399cae418a0321.tar.xz
xfrm: Copy policy family in clone_policy
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>
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 6eb228a70131..2a6093840e7e 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1306,6 +1306,7 @@ 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);