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Subject[patch 08/76] NET: Messed multicast lists after dev_mc_sync/unsync
-stable review patch.  If anyone has any objections, please let us know.

From: Jorge Boncompte [DTI2] <>

Upstream commit: 12aa343add3eced38a44bdb612b35fdf634d918c

Commit a0a400d79e3dd7843e7e81baa3ef2957bdc292d0 ("[NET]: dev_mcast:
add multicast list synchronization helpers") from you introduced a new
field "da_synced" to struct dev_addr_list that is not properly
initialized to 0. So when any of the current users (8021q, macvlan,
mac80211) calls dev_mc_sync/unsync they mess the address list for both

The attached patch fixed it for me and avoid future problems.

Signed-off-by: Jorge Boncompte [DTI2] <>
Signed-off-by: Patrick McHardy <>
Signed-off-by: David S. Miller <>
Signed-off-by: Greg Kroah-Hartman <>
Signed-off-by: Chris Wright <>

net/core/dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2906,7 +2906,7 @@ int __dev_addr_add(struct dev_addr_list

- da = kmalloc(sizeof(*da), GFP_ATOMIC);
+ da = kzalloc(sizeof(*da), GFP_ATOMIC);
if (da == NULL)
return -ENOMEM;
memcpy(da->da_addr, addr, alen);

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