Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.14 09/59] xfrm: Fix error return code in xfrm_output_one() | Date | Wed, 26 Dec 2018 17:37:49 -0500 |
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From: Wei Yongjun <weiyongjun1@huawei.com>
[ Upstream commit 533555e5cbb6aa2d77598917871ae5b579fe724b ]
xfrm_output_one() does not return a error code when there is no dst_entry attached to the skb, it is still possible crash with a NULL pointer dereference in xfrm_output_resume(). Fix it by return error code -EHOSTUNREACH.
Fixes: 9e1437937807 ("xfrm: Fix NULL pointer dereference when skb_dst_force clears the dst_entry.") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- net/xfrm/xfrm_output.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c index c47660fba498..b226b230e8bf 100644 --- a/net/xfrm/xfrm_output.c +++ b/net/xfrm/xfrm_output.c @@ -103,6 +103,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err) skb_dst_force(skb); if (!skb_dst(skb)) { XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR); + err = -EHOSTUNREACH; goto error_nolock; } -- 2.19.1
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