This is a note to let you know that I've just added the patch titled
net: bridge: fix under estimation in br_get_linkxstats_size()
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-bridge-fix-under-estimation-in-br_get_linkxstats.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 a4c6b83499f8783542494d1efdc9b6eb42e88e68
Author: Eric Dumazet <edumazet@xxxxxxxxxx>
Date: Mon Oct 4 18:05:08 2021 -0700
net: bridge: fix under estimation in br_get_linkxstats_size()
[ Upstream commit 0854a0513321cf70bea5fa483ebcaa983cc7c62e ]
Commit de1799667b00 ("net: bridge: add STP xstats")
added an additional nla_reserve_64bit() in br_fill_linkxstats(),
but forgot to update br_get_linkxstats_size() accordingly.
This can trigger the following in rtnl_stats_get()
WARN_ON(err == -EMSGSIZE);
Fixes: de1799667b00 ("net: bridge: add STP xstats")
Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Vivien Didelot <vivien.didelot@xxxxxxxxx>
Cc: Nikolay Aleksandrov <nikolay@xxxxxxxxxx>
Acked-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index bfe6ab1914c8..31b00ba5dcc8 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -1591,6 +1591,7 @@ static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
nla_total_size_64bit(sizeof(struct br_mcast_stats)) +
+ (p ? nla_total_size_64bit(sizeof(p->stp_xstats)) : 0) +
nla_total_size(0);
}
