Re: [PATCH v3] bridge: Fix a deadlock when enabling multicast snooping

2020-12-07 Thread Jakub Kicinski
On Sat, 5 Dec 2020 10:56:45 +0200 Nikolay Aleksandrov wrote: > On 05/12/2020 01:56, Joseph Huang wrote: > > When enabling multicast snooping, bridge module deadlocks on multicast_lock > > if 1) IPv6 is enabled, and 2) there is an existing querier on the same L2 > > network. > > > > The deadlock wa

Re: [PATCH v3] bridge: Fix a deadlock when enabling multicast snooping

2020-12-05 Thread Nikolay Aleksandrov
On 05/12/2020 01:56, Joseph Huang wrote: > When enabling multicast snooping, bridge module deadlocks on multicast_lock > if 1) IPv6 is enabled, and 2) there is an existing querier on the same L2 > network. > > The deadlock was caused by the following sequence: While holding the lock, > br_multicas

[PATCH v3] bridge: Fix a deadlock when enabling multicast snooping

2020-12-04 Thread Joseph Huang
When enabling multicast snooping, bridge module deadlocks on multicast_lock if 1) IPv6 is enabled, and 2) there is an existing querier on the same L2 network. The deadlock was caused by the following sequence: While holding the lock, br_multicast_open calls br_multicast_join_snoopers, which eventu