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:5a:c2:6e:e2:55:78, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5770/1:b..l P6779/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=16249, q=389 ncpus=2)
task:syz.2.262 state:R running task stack:27656 pid:6779 ppid:6776 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6866
preempt_schedule+0xab/0xc0 kernel/sched/core.c:6890
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1523 [inline]
zap_pmd_range mm/memory.c:1571 [inline]
zap_pud_range mm/memory.c:1600 [inline]
zap_p4d_range mm/memory.c:1621 [inline]
unmap_page_range+0x236f/0x2fe0 mm/memory.c:1642
unmap_vmas+0x25e/0x3a0 mm/memory.c:1732
exit_mmap+0x200/0xb50 mm/mmap.c:3302
__mmput+0x118/0x3c0 kernel/fork.c:1355
exit_mm+0x1da/0x2c0 kernel/exit.c:569
do_exit+0x88e/0x23c0 kernel/exit.c:870
do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
get_signal+0x12fc/0x1400 kernel/signal.c:2902
arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
task:syz-executor state:R running task stack:21000 pid:5770 ppid:5759 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6866
preempt_schedule+0xab/0xc0 kernel/sched/core.c:6890
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
unwind_next_frame+0x200f/0x2970 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf7/0x1f0 mm/page_owner.c:128
__reset_page_owner+0x4e/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1154 [inline]
free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
discard_slab mm/slub.c:2127 [inline]
__unfreeze_partials+0x1cf/0x210 mm/slub.c:2667
put_cpu_partial+0x17c/0x250 mm/slub.c:2743
__slab_free+0x31d/0x410 mm/slub.c:3700
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
__kmem_cache_alloc_node+0x13e/0x260 mm/slub.c:3534
__do_kmalloc_node mm/slab_common.c:1006 [inline]
__kmalloc+0xa4/0x240 mm/slab_common.c:1020
kmalloc include/linux/slab.h:604 [inline]
tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x20f/0x4b0 security/tomoyo/file.c:822
tomoyo_path_unlink+0xa3/0xe0 security/tomoyo/tomoyo.c:161
security_path_unlink+0xdc/0x130 security/security.c:1767
do_unlinkat+0x2a2/0x570 fs/namei.c:4396
__do_sys_unlink fs/namei.c:4447 [inline]
__se_sys_unlink fs/namei.c:4445 [inline]
__x64_sys_unlink+0x49/0x50 fs/namei.c:4445
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3274f8ecf7
RSP: 002b:00007ffc4115be98 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3274f8ecf7
RDX: 00007ffc4115bec0 RSI: 00007ffc4115bf50 RDI: 00007ffc4115bf50
RBP: 00007ffc4115bf50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffc4115cfe0
R13: 00007f3275013d7d R14: 00000000000251fd R15: 00007ffc4115d020
</TASK>
rcu: rcu_preempt kthread starved for 782 jiffies! g16249 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:26824 pid:17 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_timeout+0x160/0x280 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x99/0x380 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: 6769 Comm: syz.1.261 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:444 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
RIP: 0010:__perf_event_overflow+0x44/0x630 kernel/events/core.c:9657
Code: f5 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 e3 c4 d8 ff 48 8d ab 88 04 00 00 48 89 ef be 04 00 00 00 e8 7f 34 30 00 48 89 e8 <48> c1 e8 03 42 0f b6 04 38 84 c0 0f 85 cf 04 00 00 44 8b a3 88 04
RSP: 0018:ffffc90000006c18 EFLAGS: 00000056
RAX: ffff88805e4a96d0 RBX: ffff88805e4a9248 RCX: ffffffff81accbf1
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88805e4a96d0
RBP: ffff88805e4a96d0 R08: ffff88805e4a96d3 R09: 1ffff1100bc952da
R10: dffffc0000000000 R11: ffffed100bc952db R12: ffffc90000007198
R13: 0000000000000001 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007f437dbf66c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b07852ef20 CR3: 0000000059e67000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
perf_swevent_hrtimer+0x3bc/0x530 kernel/events/core.c:11188
__run_hrtimer kernel/time/hrtimer.c:1750 [inline]
__hrtimer_run_queues+0x4df/0xc40 kernel/time/hrtimer.c:1814
hrtimer_interrupt+0x3c9/0x9c0 kernel/time/hrtimer.c:1876
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:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:444 [inline]
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
RIP: 0010:rcu_is_watching+0x5a/0xb0 kernel/rcu/tree.c:700
Code: f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 ac 64 6d 00 48 c7 c3 28 6b 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 2f 8b 03 65 ff 0d a1 1b 94 7e 74 0c 83 e0 04 c1 e8 02 5b
RSP: 0018:ffffc90000007248 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffff8880b8e36b28 RCX: d02c56820d62a700
RDX: ffff888023e4bc00 RSI: ffffffff8afc6f60 RDI: ffffffff8afc6f20
RBP: ffff888029d40800 R08: ffffc9000000734f R09: 0000000000000000
R10: ffffc90000007340 R11: fffff52000000e6a R12: dffffc0000000000
R13: ffffc90000007320 R14: ffffffff8c7c8a30 R15: dffffc0000000000
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_held+0x15/0x40 kernel/rcu/update.c:348
fib6_node_lookup_1+0x354/0x8a0 net/ipv6/ip6_fib.c:1590
fib6_node_lookup+0xcd/0x1a0 net/ipv6/ip6_fib.c:1646
fib6_table_lookup+0xc0/0xa70 net/ipv6/route.c:2217
ip6_pol_route+0x22d/0x1160 net/ipv6/route.c:2257
pol_lookup_func include/net/ip6_fib.h:578 [inline]
fib6_rule_lookup+0x1d7/0x510 net/ipv6/fib6_rules.c:116
ip6_route_input_lookup net/ipv6/route.c:2326 [inline]
ip6_route_input+0x6cf/0xa50 net/ipv6/route.c:2622
ip6_rcv_finish+0x143/0x230 net/ipv6/ip6_input.c:77
NF_HOOK+0x303/0x390 include/linux/netfilter.h:304
__netif_receive_skb_one_core net/core/dev.c:5608 [inline]
__netif_receive_skb+0xcc/0x290 net/core/dev.c:5722
process_backlog+0x380/0x6e0 net/core/dev.c:6050
__napi_poll+0xc0/0x460 net/core/dev.c:6612
napi_poll net/core/dev.c:6679 [inline]
net_rx_action+0x5ea/0xbf0 net/core/dev.c:6815
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xc7/0x190 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:preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:7009
Code: 44 24 20 f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 63 bf 01 00 00 00 e8 8b b3 eb f6 e8 26 3a 1c f7 fb bf 01 00 00 00 <e8> db b5 ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90005347a60 EFLAGS: 00000286
RAX: d02c56820d62a700 RBX: ffff888023e4bc00 RCX: d02c56820d62a700
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 0000000000000001
RBP: ffffc90005347b00 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000a68f4c
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:task_work_run+0xaf/0x250 kernel/task_work.c:216
Code: c6 00 0a 00 00 4c 89 f8 48 c1 e8 03 48 89 44 24 18 48 89 0c 24 48 c1 e9 03 48 89 4c 24 10 eb 05 e8 d6 19 2d 00 48 8b 44 24 18 <42> 80 3c 20 00 74 08 4c 89 ff e8 b2 87 84 00 4d 8b 2f 4c 89 6c 24
RSP: 0018:ffffc90005347bc0 EFLAGS: 00000293
RAX: 1ffff110047c98ad RBX: 0000000000000000 RCX: ffff888023e4bc00
RDX: 0000000000000000 RSI: ffffffff8aaace60 RDI: ffffffff8afc6f80
RBP: ffffc90005347c78 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: dffffc0000000000
R13: ffff888023e4d180 R14: ffff888023e4c600 R15: ffff888023e4c568
get_signal+0x1235/0x1400 kernel/signal.c:2678
arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f437f98f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f437dbf60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f437fbe5fa8 RCX: 00007f437f98f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f437fbe5fa8
RBP: 00007f437fbe5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f437fbe6038 R14: 00007ffd351e5370 R15: 00007ffd351e5458
</TASK>
net_ratelimit: 2783 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:c2:6e:e2:55:78, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:c2:6e:e2:55:78, 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:5a:c2:6e:e2:55:78, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:c2:6e:e2:55:78, 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:5a:c2:6e:e2:55:78, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:c2:6e:e2:55:78, 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:5a:c2:6e:e2:55:78, vlan:0)
net_ratelimit: 4763 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:c2:6e:e2:55:78, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:c2:6e:e2:55:78, 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:5a:c2:6e:e2:55:78, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:c2:6e:e2:55:78, 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:5a:c2:6e:e2:55:78, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:5a:c2:6e:e2:55:78, 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:5a:c2:6e:e2:55:78, vlan:0)