bridge0: received packet on veth0_to_bridge with own address as source address (addr:fe:fb:b0:4e:31:3c, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=50625, q=337 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 9810 (4295020487-4295010677), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 9811 jiffies! g50625 f0x2 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:26856 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x15ae/0x4660 kernel/sched/core.c:6701
 schedule+0xbd/0x170 kernel/sched/core.c:6775
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13293 Comm: syz.4.1858 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:kasan_check_range+0x0/0x290 mm/kasan/generic.c:186
Code: 48 c1 ee 03 48 01 c6 48 89 c7 e8 4b 1d b2 08 31 c0 c3 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 cc cc cc cc cc cc cc cc <66> 0f 1f 00 b0 01 48 85 f6 0f 84 b4 01 00 00 55 41 57 41 56 41 55
RSP: 0018:ffffc90000006438 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000021 RCX: ffffffff8168a972
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff911eb500
RBP: ffffc90000006688 R08: dffffc0000000000 R09: 1ffffffff223d6a0
R10: dffffc0000000000 R11: fffffbfff223d6a1 R12: 0000000000000002
R13: ffff888029829e00 R14: ffffffff90b54f5a R15: ffff88802982a958
FS:  00007f912162e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2d6867c13b CR3: 0000000063371000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 __lock_acquire+0xd92/0x7d80 kernel/locking/lockdep.c:5107
 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5756
 rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 rcu_read_lock include/linux/rcupdate.h:786 [inline]
 __perf_output_begin kernel/events/ring_buffer.c:163 [inline]
 perf_output_begin_forward+0xde/0xa60 kernel/events/ring_buffer.c:273
 __perf_event_output kernel/events/core.c:7977 [inline]
 perf_event_output_forward+0x25a/0x3e0 kernel/events/core.c:7995
 __perf_event_overflow+0x461/0x660 kernel/events/core.c:9720
 perf_event_overflow kernel/events/core.c:9741 [inline]
 perf_swevent_hrtimer+0x437/0x610 kernel/events/core.c:11230
 __run_hrtimer kernel/time/hrtimer.c:1754 [inline]
 __hrtimer_run_queues+0x4e8/0xc10 kernel/time/hrtimer.c:1818
 hrtimer_interrupt+0x39d/0x980 kernel/time/hrtimer.c:1880
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
 __sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1088
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:rcu_rdp_cpu_online kernel/rcu/tree.c:4192 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0x7e/0x120 kernel/rcu/tree.c:4233
Code: 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 b6 76 6e 00 48 8b 03 48 8d 98 40 d1 03 00 48 8d b8 60 d1 03 00 48 89 f8 <48> c1 e8 03 42 80 3c 30 00 74 05 e8 92 76 6e 00 4c 8b 7b 20 48 83
RSP: 0018:ffffc90000007070 EFLAGS: 00000246
RAX: ffff8880b8e3d160 RBX: ffff8880b8e3d140 RCX: 23e7bb40af92a100
RDX: ffff888029829e00 RSI: ffffffff8b1d3b80 RDI: ffff8880b8e3d160
RBP: ffffc90000007208 R08: 0001000000000000 R09: 0000001800240000
R10: 00000000000002ff R11: 0200000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88802f7c0d00
 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline]
 rcu_read_lock_held+0x1e/0x40 kernel/rcu/update.c:348
 __rhashtable_lookup include/linux/rhashtable.h:602 [inline]
 rhashtable_lookup+0x179/0x7f0 include/linux/rhashtable.h:646
 br_mdb_ip_get_rcu net/bridge/br_multicast.c:102 [inline]
 br_mdb_get+0x61d/0x850 net/bridge/br_multicast.c:197
 br_handle_frame_finish+0xc47/0x15c0 net/bridge/br_input.c:183
 br_nf_hook_thresh+0x3cd/0x4a0 net/bridge/br_netfilter_hooks.c:1188
 br_nf_pre_routing_finish_ipv6+0x9e5/0xd20 net/bridge/br_netfilter_ipv6.c:-1
 NF_HOOK include/linux/netfilter.h:304 [inline]
 br_nf_pre_routing_ipv6+0x34d/0x6a0 net/bridge/br_netfilter_ipv6.c:184
 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
 br_handle_frame+0x1240/0x14d0 net/bridge/br_input.c:424
 __netif_receive_skb_core+0xf94/0x3ac0 net/core/dev.c:5564
 __netif_receive_skb_one_core net/core/dev.c:5668 [inline]
 __netif_receive_skb+0x74/0x290 net/core/dev.c:5784
 process_backlog+0x380/0x710 net/core/dev.c:6112
 __napi_poll+0xbb/0x460 net/core/dev.c:6674
 napi_poll net/core/dev.c:6741 [inline]
 net_rx_action+0x65f/0xcc0 net/core/dev.c:6877
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:schedule_debug kernel/sched/core.c:5939 [inline]
RIP: 0010:__schedule+0x16e/0x4660 kernel/sched/core.c:6592
Code: f7 4d 8b 36 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 09 c4 46 f7 49 81 3e 9d 6e ac 57 <0f> 85 c6 16 00 00 45 85 e4 4c 8b 74 24 28 75 60 49 83 c6 18 4c 89
RSP: 0018:ffffc9000328f060 EFLAGS: 00000246
RAX: 1ffff92000651000 RBX: ffffffff8ca9ca30 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000328f200
RBP: ffffc9000328f270 R08: ffffc9000328f1ff R09: 0000000000000000
R10: ffffc9000328f1f0 R11: fffff52000651e40 R12: 0000000000000001
R13: ffff8880b8e00000 R14: ffffc90003288000 R15: ffff8880b8e3cc60
 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7011
 irqentry_exit+0x67/0x70 kernel/entry/common.c:441
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x142/0x1c0 kernel/softirq.c:413
Code: 8a e8 42 84 3e 09 65 66 8b 05 5a db b0 7e 66 85 c0 75 54 bf 01 00 00 00 e8 7b 1d 0a 00 e8 f6 1f 3b 00 fb 65 8b 05 26 db b0 7e <85> c0 75 05 e8 15 c0 ad ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc9000328f3e0 EFLAGS: 00000282
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 23e7bb40af92a100
RDX: dffffc0000000000 RSI: ffffffff8acacce0 RDI: ffffffff8b1d3ba0
RBP: ffffc9000328f470 R08: ffffffff8e8c316f R09: 1ffffffff1d1862d
R10: dffffc0000000000 R11: fffffbfff1d1862e R12: ffffffff888462e2
R13: 1ffff92000651eb0 R14: dffffc0000000000 R15: 1ffff92000651e7c
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:856 [inline]
 __dev_queue_xmit+0x1329/0x37e0 net/core/dev.c:4514
 packet_snd net/packet/af_packet.c:3161 [inline]
 packet_sendmsg+0x38d9/0x4a30 net/packet/af_packet.c:3193
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x61b/0x980 net/socket.c:2595
 ___sys_sendmsg+0x2a6/0x360 net/socket.c:2649
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2687 [inline]
 __se_sys_sendmsg+0x1d0/0x2c0 net/socket.c:2685
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f912079e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f912162e028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9120a26090 RCX: 00007f912079e159
RDX: 0000000000008045 RSI: 0000200000000040 RDI: 0000000000000012
RBP: 00007f912083506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9120a26128 R14: 00007f9120a26090 R15: 00007ffcf2140948
 </TASK>
net_ratelimit: 2773 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:fe:fb:b0:4e:31:3c, 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:fe:fb:b0:4e:31:3c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:fe:fb:b0:4e:31:3c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:fe:fb:b0:4e:31:3c, 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:fe:fb:b0:4e:31:3c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
net_ratelimit: 11505 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:fe:fb:b0:4e:31:3c, 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:fe:fb:b0:4e:31:3c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:fe:fb:b0:4e:31:3c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:fe:fb:b0:4e:31:3c, 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:fe:fb:b0:4e:31:3c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)