netdev - [PATCH] xfrm: fix potential incorrect pointer dereference in xfrm_bundle

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 25 Jan 2014 20:47:53 +0200
From:	Horia Geanta <horia.geanta@...escale.com>
To:	Steffen Klassert <steffen.klassert@...unet.com>
CC:	<netdev@...r.kernel.org>
Subject: [PATCH] xfrm: fix potential incorrect pointer dereference in xfrm_bundle_create

Return value of xfrm_alloc_dst might be an error code.
Need to check this before using the pointer safely.

Signed-off-by: Horia Geanta <horia.geanta@...escale.com>
---
 net/xfrm/xfrm_policy.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 9a91f74..f230f2a 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1541,7 +1541,7 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
 
 	for (; i < nx; i++) {
 		struct xfrm_dst *xdst = xfrm_alloc_dst(net, family);
-		struct dst_entry *dst1 = &xdst->u.dst;
+		struct dst_entry *dst1;
 
 		err = PTR_ERR(xdst);
 		if (IS_ERR(xdst)) {
@@ -1560,6 +1560,8 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
 		} else
 			inner_mode = xfrm[i]->inner_mode;
 
+		dst1 = &xdst->u.dst;
+
 		if (!dst_prev)
 			dst0 = dst1;
 		else {
-- 
1.8.3.1


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html