bridge0: port 2(bridge_slave_1) entered forwarding state
bridge0: topology change detected, propagating
bridge0: port 1(bridge_slave_0) entered forwarding state
bridge0: topology change detected, propagating
------------[ cut here ]------------
WARNING: CPU: 1 PID: 10100 at kernel/rcu/tree_stall.h:1015 rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1015
Modules linked in:
CPU: 1 UID: 0 PID: 10100 Comm: syz.2.1835 Not tainted 6.16.0-rc3-syzkaller-00116-ge34a79b96ab9 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1015
Code: ff ff 48 c7 c7 40 44 a9 99 be 04 00 00 00 e8 33 03 7a 00 4c 89 f7 b8 01 00 00 00 87 05 55 9e 01 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 00 42 14 8e 74 47 48 c7 c0 30 13 a0 8f 48 c1 e8
RSP: 0018:ffffc90000a08bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000a02 RCX: ffffffff81a7a5dd
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e144200
RBP: ffffc90000a08e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff3352888 R12: 0000000000002904
R13: 1ffff110170e75c2 R14: ffffffff8e144200 R15: dffffc0000000000
FS: 000055558a157500(0000) GS:ffff888125d83000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003c80 CR3: 00000000335ca000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_core+0x5f7/0x1710 kernel/rcu/tree.c:2827
handle_softirqs+0x286/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0xf69/0x12d0 kernel/smp.c:885
Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 b0 79 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 5b 75 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 40 75 0b
RSP: 0018:ffffc900033679e0 EFLAGS: 00000293
RAX: ffffffff81b4d830 RBX: ffff8880b873b040 RCX: ffff888064fd1e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003367b40 R08: ffffffff8f9fe1f7 R09: 1ffffffff1f3fc3e
R10: dffffc0000000000 R11: fffffbfff1f3fc3f R12: 1ffff110170c835d
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8641ae8
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
on_each_cpu include/linux/smp.h:71 [inline]
smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2691 [inline]
smp_text_poke_batch_finish+0x5e0/0x1100 arch/x86/kernel/alternative.c:2901
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
__static_key_slow_dec_cpuslocked+0xbb/0x110 kernel/jump_label.c:315
__static_key_slow_dec kernel/jump_label.c:321 [inline]
static_key_slow_dec+0x45/0x90 kernel/jump_label.c:336
kvm_destroy_vm virt/kvm/kvm_main.c:1320 [inline]
kvm_put_kvm+0x1177/0x1650 virt/kvm/kvm_main.c:1344
kvm_vm_release+0x43/0x50 virt/kvm/kvm_main.c:1367
__fput+0x449/0xa70 fs/file_table.c:465
task_work_run+0x1d1/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f153dd8e929
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:00007ffcf4074aa8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000031957 RCX: 00007f153dd8e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f153dfb7ba0 R08: 0000000000000001 R09: 00000004f4074d9f
R10: 00007f153dc00000 R11: 0000000000000246 R12: 00007f153dfb5fac
R13: 00007f153dfb5fa0 R14: ffffffffffffffff R15: 00007ffcf4074bc0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 45 8b 2f mov (%r15),%r13d
3: 44 89 ee mov %r13d,%esi
6: 83 e6 01 and $0x1,%esi
9: 31 ff xor %edi,%edi
b: e8 b0 79 0b 00 call 0xb79c0
10: 41 83 e5 01 and $0x1,%r13d
14: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13
1b: fc ff df
1e: 75 07 jne 0x27
20: e8 5b 75 0b 00 call 0xb7580
25: eb 37 jmp 0x5e
27: f3 90 pause
* 29: 43 0f b6 04 2c movzbl (%r12,%r13,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 75 10 jne 0x42
32: 41 f7 07 01 00 00 00 testl $0x1,(%r15)
39: 74 1e je 0x59
3b: e8 .byte 0xe8
3c: 40 75 0b rex jne 0x4a