bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P19739/1:b..l rcu: (detected by 1, t=10503 jiffies, g=128045, q=1934 ncpus=2) task:syz.1.3479 state:X running task stack:28440 pid:19739 tgid:19734 ppid:0 task_flags:0x40054c flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1295/0x67a0 kernel/sched/core.c:7189 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x205/0x970 kernel/entry/common.c:164 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_acquire+0x5e/0x370 kernel/locking/lockdep.c:5872 Code: 05 fb 03 25 12 83 f8 07 0f 87 d9 02 00 00 48 0f a3 05 06 8e f2 0e 0f 82 a4 02 00 00 8b 35 8e c1 f2 0e 85 f6 0f 85 bf 00 00 00 <48> 8b 44 24 30 65 48 2b 05 9d 03 25 12 0f 85 ed 02 00 00 48 83 c4 RSP: 0018:ffffc9000444fa50 EFLAGS: 00000206 RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8deea6e6 RDI: ffffffff8c1c4780 RBP: ffffffff8e7e5560 R08: 0000000086db7919 R09: 0000000000000007 R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire.constprop.0+0x23/0x30 include/linux/rcupdate.h:300 rcu_read_lock include/linux/rcupdate.h:838 [inline] get_non_dying_memcg_start mm/memcontrol.c:817 [inline] get_non_dying_memcg_start mm/memcontrol.c:808 [inline] mod_memcg_state+0x33/0x120 mm/memcontrol.c:879 account_kmem_nmi_safe mm/memcontrol.c:3032 [inline] obj_cgroup_uncharge_pages+0x26/0x1c0 mm/memcontrol.c:3048 __memcg_kmem_uncharge_page+0x37/0x1d0 mm/memcontrol.c:3139 memcg_kmem_uncharge_page include/linux/memcontrol.h:1735 [inline] exit_task_stack_account+0x157/0x200 kernel/fork.c:511 do_exit+0x1643/0x2af0 kernel/exit.c:1009 do_group_exit+0xd5/0x2a0 kernel/exit.c:1119 get_signal+0x20ff/0x2210 kernel/signal.c:3038 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x98/0x670 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x666/0x870 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcd2639ce59 RSP: 002b:00007fcd271fe028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000000c8 RBX: 00007fcd26616270 RCX: 00007fcd2639ce59 RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000009 RBP: 00007fcd26432d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcd26616308 R14: 00007fcd26616270 R15: 00007ffdf62bcef8 bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:24:8f:c8:2b:22, vlan:0)