This is a note to let you know that I've just added the patch titled
selftests/net/ipsec: Fix Null pointer dereference in rtattr_pack()
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
selftests-net-ipsec-fix-null-pointer-dereference-in-.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a2048d31e4b3c33a2207cf43c7a9aca766e49a95
Author: Liu Ye <liuye@xxxxxxxxxx>
Date: Thu Jan 16 09:30:37 2025 +0800
selftests/net/ipsec: Fix Null pointer dereference in rtattr_pack()
[ Upstream commit 3a0b7fa095212b51ed63892540c4f249991a2d74 ]
Address Null pointer dereference / undefined behavior in rtattr_pack
(note that size is 0 in the bad case).
Flagged by cppcheck as:
tools/testing/selftests/net/ipsec.c:230:25: warning: Possible null pointer
dereference: payload [nullPointer]
memcpy(RTA_DATA(attr), payload, size);
^
tools/testing/selftests/net/ipsec.c:1618:54: note: Calling function 'rtattr_pack',
4th argument 'NULL' value is 0
if (rtattr_pack(&req.nh, sizeof(req), XFRMA_IF_ID, NULL, 0)) {
^
tools/testing/selftests/net/ipsec.c:230:25: note: Null pointer dereference
memcpy(RTA_DATA(attr), payload, size);
^
Signed-off-by: Liu Ye <liuye@xxxxxxxxxx>
Link: https://patch.msgid.link/20250116013037.29470-1-liuye@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/testing/selftests/net/ipsec.c b/tools/testing/selftests/net/ipsec.c
index be4a30a0d02ae..9b44a091802cb 100644
--- a/tools/testing/selftests/net/ipsec.c
+++ b/tools/testing/selftests/net/ipsec.c
@@ -227,7 +227,8 @@ static int rtattr_pack(struct nlmsghdr *nh, size_t req_sz,
attr->rta_len = RTA_LENGTH(size);
attr->rta_type = rta_type;
- memcpy(RTA_DATA(attr), payload, size);
+ if (payload)
+ memcpy(RTA_DATA(attr), payload, size);
return 0;
}
