------------[ cut here ]------------
WARNING: CPU: 0 PID: 5046 at kernel/rcu/tree_stall.h:984 rcu_check_gp_start_stall.part.0+0x1c3/0x4a0 kernel/rcu/tree_stall.h:976
Modules linked in:
CPU: 0 PID: 5046 Comm: syz-executor237 Not tainted 6.5.0-syzkaller-03967-gbd6c11bc43c4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:rcu_check_gp_start_stall.part.0+0x1c3/0x4a0 kernel/rcu/tree_stall.h:984
Code: 0f 88 55 01 00 00 be 04 00 00 00 48 c7 c7 00 1b 0a 92 e8 70 f7 6b 00 b8 01 00 00 00 87 05 65 44 9a 10 85 c0 0f 85 31 01 00 00 <0f> 0b 48 81 fd 00 36 9b 8c 48 c7 c3 10 f4 ac 8e 74 58 48 b8 00 00
RSP: 0018:ffffc90000007df0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000002904 RCX: ffffffff816fd690
RDX: fffffbfff2414360 RSI: 0000000000000004 RDI: ffffffff920a1b00
RBP: ffffffff8c9b3600 R08: 0000000000000001 R09: fffffbfff2414360
R10: 0000000000000003 R11: 0000000000000000 R12: 1ffffffff18c1e40
R13: 0000000000000246 R14: ffff888027828000 R15: ffff8880b983d352
FS:  00005555561e9380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558f7bc30050 CR3: 0000000029a0a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_check_gp_start_stall kernel/rcu/tree_stall.h:947 [inline]
 rcu_core+0x4e5/0x1bb0 kernel/rcu/tree.c:2398
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:csd_lock_wait kernel/smp.c:300 [inline]
RIP: 0010:smp_call_function_many_cond+0x4d6/0x1570 kernel/smp.c:844
Code: 0b 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 fc 4c 89 fd 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 9c 62 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 3c 0e 00 00 8b 43 08 31
RSP: 0018:ffffc90003acf7f8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b99417c0 RCX: 0000000000000000
RDX: ffff888027828000 RSI: ffffffff817b24e4 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000094000 R12: ffffed10173282f9
R13: 0000000000000001 R14: ffff8880b983d600 R15: ffff8880b99417c8
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1012
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:943 [inline]
 flush_tlb_mm_range+0x356/0x530 arch/x86/mm/tlb.c:1029
 dup_mmap+0xf2f/0x1c70 kernel/fork.c:774
 dup_mm kernel/fork.c:1697 [inline]
 copy_mm kernel/fork.c:1746 [inline]
 copy_process+0x6c11/0x7400 kernel/fork.c:2512
 kernel_clone+0xfd/0x930 kernel/fork.c:2920
 __do_sys_clone+0xba/0x100 kernel/fork.c:3063
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fee8406dde3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007fff7b74c5d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fee8406dde3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 00005555561e9650 R11: 0000000000000246 R12: 0000000000000001
R13: 000000000002168a R14: 00007fff7b74c6fc R15: 0000000000000003
 </TASK>
----------------
Code disassembly (best guess):
   0:	0b 00                	or     (%rax),%eax
   2:	85 ed                	test   %ebp,%ebp
   4:	74 4d                	je     0x53
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df
  10:	4d 89 fc             	mov    %r15,%r12
  13:	4c 89 fd             	mov    %r15,%rbp
  16:	49 c1 ec 03          	shr    $0x3,%r12
  1a:	83 e5 07             	and    $0x7,%ebp
  1d:	49 01 c4             	add    %rax,%r12
  20:	83 c5 03             	add    $0x3,%ebp
  23:	e8 9c 62 0b 00       	call   0xb62c4
  28:	f3 90                	pause
* 2a:	41 0f b6 04 24       	movzbl (%r12),%eax <-- trapping instruction
  2f:	40 38 c5             	cmp    %al,%bpl
  32:	7c 08                	jl     0x3c
  34:	84 c0                	test   %al,%al
  36:	0f 85 3c 0e 00 00    	jne    0xe78
  3c:	8b 43 08             	mov    0x8(%rbx),%eax
  3f:	31                   	.byte 0x31