From 143a4454daaf0e80a2b9f37159a0d6d2b61e64ed Mon Sep 17 00:00:00 2001 From: Xin Long Date: Sat, 17 Feb 2018 15:16:22 +0800 Subject: xfrm: do not call rcu_read_unlock when afinfo is NULL in xfrm_get_tos When xfrm_policy_get_afinfo returns NULL, it will not hold rcu read lock. In this case, rcu_read_unlock should not be called in xfrm_get_tos, just like other places where it's calling xfrm_policy_get_afinfo. Fixes: f5e2bb4f5b22 ("xfrm: policy: xfrm_get_tos cannot fail") Signed-off-by: Xin Long Signed-off-by: Steffen Klassert --- net/xfrm/xfrm_policy.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'net/xfrm/xfrm_policy.c') diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 8b3811ff002d..150d46633ce6 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -1458,10 +1458,13 @@ xfrm_tmpl_resolve(struct xfrm_policy **pols, int npols, const struct flowi *fl, static int xfrm_get_tos(const struct flowi *fl, int family) { const struct xfrm_policy_afinfo *afinfo; - int tos = 0; + int tos; afinfo = xfrm_policy_get_afinfo(family); - tos = afinfo ? afinfo->get_tos(fl) : 0; + if (!afinfo) + return 0; + + tos = afinfo->get_tos(fl); rcu_read_unlock(); -- cgit v1.2.3