From: Nikolay Aleksandrov <nikolay@xxxxxxxxxx> Hi, While working on per-vlan multicast snooping I found two race conditions when multicast snooping is enabled. They're identical and happen when the router port list is modified without the multicast lock. One requires a PIM hello message to be received on a port and the other an MRD advertisement. To fix them we just need to take the multicast_lock when adding the ports to the router port list (marking them as router ports). Tested on an affected setup by generating the required packets while modifying the port list in parallel. Thanks, Nik Nikolay Aleksandrov (2): net: bridge: multicast: fix PIM hello router port marking race net: bridge: multicast: fix MRD advertisement router port marking race net/bridge/br_multicast.c | 6 ++++++ 1 file changed, 6 insertions(+) -- 2.31.1
