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net: bridge: mst: Restrict info size queries to bridge ports 

Ensure that no bridge masters are ever considered for MST info
dumping. MST states are only supported on bridge ports, not bridge
masters - which br_mst_info_size relies on.

Fixes: 122c29486e ("net: bridge: mst: Support setting and reporting MST port states")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Link: https://lore.kernel.org/r/20220322133001.16181-1-tobias@waldekranz.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Tobias Waldekranz 2022-03-22 14:30:01 +01:00 committed by Jakub Kicinski
parent 4a6806cfcb
commit a911ad18a5
1 changed files with 1 additions and 1 deletions
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2
net/bridge/br_netlink.c
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@ -119,7 +119,7 @@ static size_t br_get_link_af_size_filtered(const struct net_device *dev,
/* Each VLAN is returned in bridge_vlan_info along with flags */
vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
if (vg && (filter_mask & RTEXT_FILTER_MST))
if (p && vg && (filter_mask & RTEXT_FILTER_MST))
vinfo_sz += br_mst_info_size(vg);
if (!(filter_mask & RTEXT_FILTER_CFM_STATUS))