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authorXin Long <lucien.xin@gmail.com>2018-02-17 15:16:22 +0800
committerSteffen Klassert <steffen.klassert@secunet.com>2018-02-19 08:45:25 +0100
commit143a4454daaf0e80a2b9f37159a0d6d2b61e64ed (patch)
treebe8531f260c9bec64a3f54255633769ac402ffdc /net/xfrm
parent510c321b557121861601f9d259aadd65aa274f35 (diff)
downloadlinux-143a4454daaf0e80a2b9f37159a0d6d2b61e64ed.tar.bz2
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 <lucien.xin@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_policy.c7
1 files changed, 5 insertions, 2 deletions
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();