bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:20:00:00, vlan:0)
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1
WARNING: kernel/rcu/tree_stall.h:1049 at rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049, CPU#0: syz.4.5943/30501
Modules linked in:
CPU: 0 UID: 0 PID: 30501 Comm: syz.4.5943 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049
Code: ff ff 48 c7 c7 c0 35 28 9a be 04 00 00 00 e8 53 aa 83 00 4c 89 f7 b8 01 00 00 00 87 05 65 af 7d 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 00 5f 76 8e 74 47 48 c7 c0 10 51 11 90 48 c1 e8
RSP: 0018:ffffc90000007db8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000246 RCX: ffffffff81aa864d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e765f00
RBP: ffffc90000007f30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff34506b8 R12: 0000000000002904
R13: dffffc0000000000 R14: ffffffff8e765f00 R15: dffffc0000000000
FS:  00007f52c4eb96c0(0000) GS:ffff888125496000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557168f4e8 CR3: 0000000094808000 CR4: 00000000003526f0
DR0: 0010000010000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_core+0x3fe/0x1070 kernel/rcu/tree.c:2864
 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:194
Code: f7 e8 ed 1b fe f5 f7 c3 00 02 00 00 74 05 e8 60 32 29 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 64 f0 ef f5 65 8b 05 fd 40 75 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc9000b6d78d8 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000080000001
RDX: 0000000000000007 RSI: ffffffff8deec79d RDI: 0000000000000001
RBP: ffffc9000b6d7980 R08: ffffffff90111eb7 R09: 1ffffffff20223d6
R10: dffffc0000000000 R11: fffffbfff20223d7 R12: ffff88801d2c1d80
R13: ffff8881404c3c80 R14: ffff88801d2c1d80 R15: 0000000000000000
 spin_unlock_irqrestore include/linux/spinlock.h:407 [inline]
 __slab_free+0x211/0x2b0 mm/slub.c:-1
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4459 [inline]
 slab_alloc_node mm/slub.c:4788 [inline]
 kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4795
 taskstats_tgid_alloc kernel/taskstats.c:576 [inline]
 taskstats_exit+0x14a/0xa30 kernel/taskstats.c:615
 do_exit+0x60e/0x2310 kernel/exit.c:941
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
 get_signal+0x1284/0x1330 kernel/signal.c:3034
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f52c3f9bf79
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:00007f52c4eb90e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f52c4216098 RCX: 00007f52c3f9bf79
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f52c4216098
RBP: 00007f52c4216090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f52c4216128 R14: 00007ffe252ebc70 R15: 00007ffe252ebd58
 </TASK>
----------------
Code disassembly (best guess):
   0:	f7 e8                	imul   %eax
   2:	ed                   	in     (%dx),%eax
   3:	1b fe                	sbb    %esi,%edi
   5:	f5                   	cmc
   6:	f7 c3 00 02 00 00    	test   $0x200,%ebx
   c:	74 05                	je     0x13
   e:	e8 60 32 29 f6       	call   0xf6293273
  13:	9c                   	pushf
  14:	58                   	pop    %rax
  15:	a9 00 02 00 00       	test   $0x200,%eax
  1a:	75 27                	jne    0x43
  1c:	f7 c3 00 02 00 00    	test   $0x200,%ebx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 64 f0 ef f5       	call   0xf5eff093 <-- trapping instruction
  2f:	65 8b 05 fd 40 75 07 	mov    %gs:0x77540fd(%rip),%eax        # 0x7754133
  36:	85 c0                	test   %eax,%eax
  38:	74 18                	je     0x52
  3a:	5b                   	pop    %rbx
  3b:	41 5e                	pop    %r14
  3d:	c3                   	ret
  3e:	cc                   	int3
  3f:	cc                   	int3