This is a note to let you know that I've just added the patch titled
bridge: Fix VLAN reference count problem
to the 4.14-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:
bridge-fix-vlan-reference-count-problem.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Tue Mar 6 19:02:12 PST 2018
From: Ido Schimmel <idosch@xxxxxxxxxxxx>
Date: Sun, 25 Feb 2018 21:59:06 +0200
Subject: bridge: Fix VLAN reference count problem
From: Ido Schimmel <idosch@xxxxxxxxxxxx>
[ Upstream commit 0e5a82efda872c2469c210957d7d4161ef8f4391 ]
When a VLAN is added on a port, a reference is taken on the
corresponding master VLAN entry. If it does not already exist, then it
is created and a reference taken.
However, in the second case a reference is not really taken when
CONFIG_REFCOUNT_FULL is enabled as refcount_inc() is replaced by
refcount_inc_not_zero().
Fix this by using refcount_set() on a newly created master VLAN entry.
Fixes: 251277598596 ("net, bridge: convert net_bridge_vlan.refcnt from atomic_t to refcount_t")
Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxxxx>
Acked-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/bridge/br_vlan.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -157,6 +157,8 @@ static struct net_bridge_vlan *br_vlan_g
masterv = br_vlan_find(vg, vid);
if (WARN_ON(!masterv))
return NULL;
+ refcount_set(&masterv->refcnt, 1);
+ return masterv;
}
refcount_inc(&masterv->refcnt);
Patches currently in stable-queue which might be from idosch@xxxxxxxxxxxx are
queue-4.14/mlxsw-spectrum_router-fix-error-path-in-mlxsw_sp_vr_create.patch
queue-4.14/mlxsw-spectrum_router-do-not-unconditionally-clear-route-offload-indication.patch
queue-4.14/bridge-fix-vlan-reference-count-problem.patch
queue-4.14/net-ipv4-set-addr_type-in-hash_keys-for-forwarded-case.patch
queue-4.14/mlxsw-spectrum_switchdev-check-success-of-fdb-add-operation.patch