On Thu, Jan 11, 2024 at 11:06:36PM +0800, Pavel Tikhomirov wrote: > Code processing skb from neigh->arp_queue can access its > nf_bridge->physindev, which can already be freed, leading to crash. > > So, as Florian suggests, we can put physinif on nf_bridge and peek into > the original device with dev_get_by_index_rcu(), so that we can be sure > that device is not freed under us. > > This is a second attempt to fix this issue, first attempt: > > "neighbour: purge nf_bridged skb from foreign device neigh" > https://lore.kernel.org/netdev/20240108085232.95437-1-ptikhomirov@xxxxxxxxxxxxx/ I have applied this series to nf.git I have added a Fixed: tag sufficiently old to the patch fix so it can reach -stable at some point. My understanding is that this problem has been always there for br_netfilter.
