bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4d:74:9e:5b:5b, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P738/1:b..l rcu: (detected by 0, t=10503 jiffies, g=43965, q=634 ncpus=2) task:kworker/u8:5 state:R running task stack:22864 pid:738 tgid:738 ppid:2 flags:0x00004000 Workqueue: writeback wb_workfn (flush-8:0) Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0xe55/0x5730 kernel/sched/core.c:6690 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7012 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:878 [inline] RIP: 0010:page_ext_put+0x4e/0xd0 mm/page_ext.c:550 Code: 91 92 ff 85 db 75 23 e8 e0 8e 92 ff 48 c7 c7 80 83 1b 8e 48 8d 35 00 00 00 00 e8 4d b0 6f ff e8 48 6c 79 ff 5b e9 c2 8e 92 ff bd 8e 92 ff e8 98 95 78 ff 31 ff 89 c3 89 c6 e8 8d 90 92 ff 84 RSP: 0018:ffffc900031bef38 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81faf017 RDX: ffff888025035a00 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff88801de62730 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000010fb9 R12: 00000000035004b2 R13: 0000000000000001 R14: 0000000000000000 R15: ffff88801de626e8 __reset_page_owner+0x28d/0x400 mm/page_owner.c:300 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0x5f4/0xdc0 mm/page_alloc.c:2638 __put_partials+0x14c/0x170 mm/slub.c:3145 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4141 new_handle fs/jbd2/transaction.c:461 [inline] jbd2__journal_start+0x193/0x6a0 fs/jbd2/transaction.c:488 __ext4_journal_start_sb+0x358/0x660 fs/ext4/ext4_jbd2.c:112 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_do_writepages+0xb57/0x2fe0 fs/ext4/inode.c:2707 ext4_writepages+0x303/0x730 fs/ext4/inode.c:2813 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2683 __writeback_single_inode+0x166/0xfa0 fs/fs-writeback.c:1658 writeback_sb_inodes+0x603/0xfa0 fs/fs-writeback.c:1954 __writeback_inodes_wb+0xff/0x2e0 fs/fs-writeback.c:2025 wb_writeback+0x721/0xb50 fs/fs-writeback.c:2136 wb_check_old_data_flush fs/fs-writeback.c:2240 [inline] wb_do_writeback fs/fs-writeback.c:2293 [inline] wb_workfn+0x8c3/0xbc0 fs/fs-writeback.c:2321 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: rcu_preempt kthread starved for 2005 jiffies! g43965 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:28400 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0xe55/0x5730 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2615 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: CPU: 0 UID: 0 PID: 3976 Comm: kworker/u8:8 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:rcu_read_lock include/linux/rcupdate.h:850 [inline] RIP: 0010:net_generic+0x105/0x2a0 include/net/netns/generic.h:45 Code: f7 48 c7 c7 80 83 1b 8e 48 8d 35 00 00 00 00 e8 e1 0c 73 f7 e8 dc c8 7c f7 48 89 e8 5b 5d 41 5c c3 cc cc cc cc e8 4b eb 95 f7 26 f2 7b f7 31 ff 41 89 c4 89 c6 e8 1a ed 95 f7 45 84 e4 0f 85 RSP: 0018:ffffc90000007428 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 000000000000004a RCX: ffffffff89f792f7 RDX: ffff8880313a1e00 RSI: ffffffff89f793b5 RDI: 0000000000000005 RBP: ffff88805ede1dc0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffff88815bfe36dc R14: 0000000000000000 R15: ffffc90000007550 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8b61dffffc CR3: 0000000062d42000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: is_pppoe_ip net/bridge/br_netfilter_hooks.c:122 [inline] br_nf_forward+0x1bc/0x1bd0 net/bridge/br_netfilter_hooks.c:797 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626 nf_hook+0x474/0x7d0 include/linux/netfilter.h:269 NF_HOOK include/linux/netfilter.h:312 [inline] __br_forward+0x1be/0x5b0 net/bridge/br_forward.c:115 deliver_clone+0x5b/0xa0 net/bridge/br_forward.c:131 maybe_deliver+0xa7/0x120 net/bridge/br_forward.c:190 br_flood+0x17e/0x5c0 net/bridge/br_forward.c:236 br_handle_frame_finish+0xda5/0x1c80 net/bridge/br_input.c:215 nf_hook_bridge_pre net/bridge/br_input.c:299 [inline] br_handle_frame+0xd96/0x1490 net/bridge/br_input.c:424 __netif_receive_skb_core.constprop.0+0xa3d/0x4330 net/core/dev.c:5560 __netif_receive_skb_one_core+0xb1/0x1e0 net/core/dev.c:5664 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5779 process_backlog+0x443/0x15f0 net/core/dev.c:6111 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6775 napi_poll net/core/dev.c:6844 [inline] net_rx_action+0xa92/0x1010 net/core/dev.c:6966 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554 do_softirq kernel/softirq.c:455 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:442 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382 spin_unlock_bh include/linux/spinlock.h:396 [inline] cfg80211_put_bss+0x1b4/0x280 net/wireless/scan.c:3308 ieee80211_rx_bss_put net/mac80211/scan.c:37 [inline] ieee80211_rx_bss_put+0x43/0x60 net/mac80211/scan.c:32 ieee80211_rx_bss_info net/mac80211/ibss.c:1172 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1579 [inline] ieee80211_ibss_rx_queued_mgmt+0x1a14/0x2f40 net/mac80211/ibss.c:1606 ieee80211_iface_process_skb net/mac80211/iface.c:1603 [inline] ieee80211_iface_work+0xc0b/0xf00 net/mac80211/iface.c:1657 cfg80211_wiphy_work+0x3d9/0x550 net/wireless/core.c:440 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 net_ratelimit: 10543 callbacks suppressed bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4d:74:9e:5b:5b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:4d:74:9e:5b:5b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)