bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15552/1:b..l P15530/1:b..l P15730/1:b..l P17066/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=89749, q=515 ncpus=2)
task:syz.4.2448      state:R  running task     stack:27288 pid:17066 tgid:17063 ppid:11635  task_flags:0x40054c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6929
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7113
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 zap_pte_range mm/memory.c:1885 [inline]
 zap_pmd_range mm/memory.c:1947 [inline]
 zap_pud_range mm/memory.c:1976 [inline]
 zap_p4d_range mm/memory.c:1997 [inline]
 unmap_page_range+0x214f/0x41b0 mm/memory.c:2018
 unmap_single_vma.constprop.0+0x153/0x240 mm/memory.c:2061
 unmap_vmas+0x218/0x470 mm/memory.c:2105
 exit_mmap+0x1b2/0xb90 mm/mmap.c:1280
 __mmput+0x12a/0x410 kernel/fork.c:1133
 mmput+0x62/0x70 kernel/fork.c:1156
 exit_mm kernel/exit.c:582 [inline]
 do_exit+0x7c7/0x2bf0 kernel/exit.c:954
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
 get_signal+0x2671/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x85/0x130 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0c6db8f749
RSP: 002b:00007f0c6e9720e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f0c6dde6098 RCX: 00007f0c6db8f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0c6dde6098
RBP: 00007f0c6dde6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0c6dde6128 R14: 00007ffec3338060 R15: 00007ffec3338148
 </TASK>
task:udevd           state:R  running task     stack:27480 pid:15730 tgid:15730 ppid:5199   task_flags:0x40014c flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6929
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7256
 irqentry_exit+0x36/0x90 kernel/entry/common.c:211
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: e9 ed 2e 5c 00 be 03 00 00 00 5b e9 c2 93 e5 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 78 d8 e4 11 65 8b 05 89 d8 e4 11 a9 00 01 ff 00 74 1d
RSP: 0018:ffffc90004877650 EFLAGS: 00000202
RAX: 0000000000002152 RBX: 0000000000052152 RCX: ffffffff822fc1b3
RDX: ffff88802c120000 RSI: ffffffff822fc1c5 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000002152 R11: 0000000000000001 R12: ffff88801dca6950
R13: ffff88801dca699c R14: 0000000000000000 R15: dffffc0000000000
 page_ext_next include/linux/page_ext.h:108 [inline]
 page_ext_iter_next include/linux/page_ext.h:156 [inline]
 __page_table_check_zero+0x2e5/0x5d0 mm/page_table_check.c:139
 page_table_check_free include/linux/page_table_check.h:43 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 free_unref_folios+0xa4f/0x1610 mm/page_alloc.c:2958
 folios_put_refs+0x4be/0x750 mm/swap.c:1002
 free_pages_and_swap_cache+0x245/0x4a0 mm/swap_state.c:355
 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:397 [inline]
 tlb_flush_mmu mm/mmu_gather.c:404 [inline]
 tlb_finish_mmu+0x168/0x7c0 mm/mmu_gather.c:497
 exit_mmap+0x3fc/0xb90 mm/mmap.c:1293
 __mmput+0x12a/0x410 kernel/fork.c:1133
 mmput+0x62/0x70 kernel/fork.c:1156
 exit_mm kernel/exit.c:582 [inline]
 do_exit+0x7c7/0x2bf0 kernel/exit.c:954
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
 __do_sys_exit_group kernel/exit.c:1118 [inline]
 __se_sys_exit_group kernel/exit.c:1116 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1116
 x64_sys_call+0x150b/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33474f16c5
RSP: 002b:00007fffde502dd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000055b03cee5a40 RCX: 00007f33474f16c5
RDX: 00000000000000e7 RSI: fffffffffffffe68 RDI: 0000000000000000
RBP: 000055b03cebd910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffde502e20 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:udevd           state:R  running task     stack:26120 pid:15530 tgid:15530 ppid:5199   task_flags:0x40014c flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6929
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7256
 irqentry_exit+0x36/0x90 kernel/entry/common.c:211
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:121 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5844 [inline]
RIP: 0010:lock_acquire+0x10a/0x350 kernel/locking/lockdep.c:5825
Code: 85 4f ff ff ff e8 96 7a 93 ff e9 45 ff ff ff 48 8b 74 24 68 48 89 df e8 64 87 8b 00 8b 0d 52 29 ea 0e 85 c9 0f 84 b1 00 00 00 <65> 8b 05 d7 1d 09 12 85 c0 0f 85 a2 00 00 00 65 48 8b 05 17 dc 08
RSP: 0018:ffffc90003e273b8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff8e3c45e0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff816bb3e1 RDI: fffffbfff1c788bc
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000f858 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:867 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
 unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 save_stack+0x160/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x84/0x1a0 mm/page_owner.c:311
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 free_unref_folios+0xa31/0x1610 mm/page_alloc.c:2958
 folios_put_refs+0x4be/0x750 mm/swap.c:1002
 free_pages_and_swap_cache+0x245/0x4a0 mm/swap_state.c:355
 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:397 [inline]
 tlb_flush_mmu mm/mmu_gather.c:404 [inline]
 tlb_finish_mmu+0x168/0x7c0 mm/mmu_gather.c:497
 exit_mmap+0x3fc/0xb90 mm/mmap.c:1293
 __mmput+0x12a/0x410 kernel/fork.c:1133
 mmput+0x62/0x70 kernel/fork.c:1156
 exit_mm kernel/exit.c:582 [inline]
 do_exit+0x7c7/0x2bf0 kernel/exit.c:954
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
 __do_sys_exit_group kernel/exit.c:1118 [inline]
 __se_sys_exit_group kernel/exit.c:1116 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1116
 x64_sys_call+0x150b/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33474f16c5
RSP: 002b:00007fffde502dd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000055b03cecfb20 RCX: 00007f33474f16c5
RDX: 00000000000000e7 RSI: fffffffffffffe68 RDI: 0000000000000000
RBP: 000055b03cebd910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffde502e20 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:udevd           state:R  running task     stack:24728 pid:15552 tgid:15552 ppid:5199   task_flags:0x40014c flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6929
 preempt_schedule_notrace+0x62/0xe0 kernel/sched/core.c:7206
 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13
 rcu_is_watching+0x8e/0xc0 kernel/rcu/tree.c:752
 rcu_read_lock include/linux/rcupdate.h:868 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
 unwind_next_frame+0xa3b/0x20a0 arch/x86/kernel/unwind_orc.c:479
 __unwind_start+0x45f/0x7f0 arch/x86/kernel/unwind_orc.c:758
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0x73/0x100 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:559
 __call_rcu_common.constprop.0+0xa5/0xa10 kernel/rcu/tree.c:3123
 slab_free_hook mm/slub.c:2507 [inline]
 slab_free mm/slub.c:6642 [inline]
 kmem_cache_free+0x171/0x6c0 mm/slub.c:6752
 anon_vma_free mm/rmap.c:136 [inline]
 __put_anon_vma+0x114/0x3a0 mm/rmap.c:2777
 put_anon_vma include/linux/rmap.h:117 [inline]
 unlink_anon_vmas+0x58a/0x820 mm/rmap.c:443
 free_pgtables+0x212/0xc00 mm/memory.c:414
 exit_mmap+0x3f4/0xb90 mm/mmap.c:1291
 __mmput+0x12a/0x410 kernel/fork.c:1133
 mmput+0x62/0x70 kernel/fork.c:1156
 exit_mm kernel/exit.c:582 [inline]
 do_exit+0x7c7/0x2bf0 kernel/exit.c:954
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
 __do_sys_exit_group kernel/exit.c:1118 [inline]
 __se_sys_exit_group kernel/exit.c:1116 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1116
 x64_sys_call+0x150b/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33474f16c5
RSP: 002b:00007fffde502dd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000055b03ced0ad0 RCX: 00007f33474f16c5
RDX: 00000000000000e7 RSI: fffffffffffffe68 RDI: 0000000000000000
RBP: 000055b03cebd910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffde502e20 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10443 jiffies! g89749 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:28552 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7026
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: 67 6f 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 74 2c 00 fb f4 <e9> 3c 0a 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197de8 EFLAGS: 000002c6
RAX: 00000000002c5355 RBX: 0000000000000001 RCX: ffffffff8b5db2a9
RDX: 0000000000000000 RSI: ffffffff8da29329 RDI: ffffffff8bf078c0
RBP: ffffed1003ad0b58 R08: 0000000000000001 R09: ffffed10170a6655
R10: ffff8880b85332ab R11: 0000000000000001 R12: 0000000000000001
R13: ffff88801d685ac0 R14: ffffffff90824cd0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124b0d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3347be5e80 CR3: 000000007f36e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:190 [inline]
 do_idle+0x38d/0x500 kernel/sched/idle.c:330
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:428
 start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:315
 common_startup_64+0x13e/0x148
 </TASK>
net_ratelimit: 12680 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
net_ratelimit: 13392 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:9a:9a:8c:e2:e3:02, vlan:0)