This is a note to let you know that I've just added the patch titled
net: ice: Fix potential NULL pointer dereference in ice_bridge_setlink()
to the 5.10-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:
net-ice-fix-potential-null-pointer-dereference-in-ic.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9376080ec1ff5c0693907c5724bb9e53e35446ae
Author: Rand Deeb <rand.sec96@xxxxxxxxx>
Date: Wed Feb 28 18:54:48 2024 +0300
net: ice: Fix potential NULL pointer dereference in ice_bridge_setlink()
[ Upstream commit 06e456a05d669ca30b224b8ed962421770c1496c ]
The function ice_bridge_setlink() may encounter a NULL pointer dereference
if nlmsg_find_attr() returns NULL and br_spec is dereferenced subsequently
in nla_for_each_nested(). To address this issue, add a check to ensure that
br_spec is not NULL before proceeding with the nested attribute iteration.
Fixes: b1edc14a3fbf ("ice: Implement ice_bridge_getlink and ice_bridge_setlink")
Signed-off-by: Rand Deeb <rand.sec96@xxxxxxxxx>
Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 02f72fbec1042..035bc90c81246 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -6546,6 +6546,8 @@ ice_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
pf_sw = pf->first_sw;
/* find the attribute in the netlink message */
br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
+ if (!br_spec)
+ return -EINVAL;
nla_for_each_nested(attr, br_spec, rem) {
__u16 mode;
