------------[ cut here ]------------
WARNING: CPU: 1 PID: 112 at kernel/rcu/tree_stall.h:993 rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:993
Modules linked in:
CPU: 1 UID: 0 PID: 112 Comm: kswapd0 Not tainted 6.11.0-rc1-syzkaller-00293-gdefaf1a2113a #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:993
Code: 88 61 01 00 00 be 04 00 00 00 48 c7 c7 80 35 e9 94 e8 d0 cd 76 00 b8 01 00 00 00 87 05 35 4e 76 13 85 c0 0f 85 3d 01 00 00 90 <0f> 0b 90 48 81 fd 40 3b dc 8d 48 c7 c3 b8 37 11 90 74 5a 48 b8 00
RSP: 0018:ffffc90000598df0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000002904 RCX: ffffffff8172e740
RDX: fffffbfff29d26b0 RSI: 0000000000000004 RDI: ffffffff94e93580
RBP: ffffffff8ddc3b40 R08: 0000000000000001 R09: fffffbfff29d26b0
R10: 0000000000000003 R11: 0000000000000000 R12: 1ffffffff1b41e40
R13: 0000000000000246 R14: ffffffff8ddc3b40 R15: ffff88802c13fd12
FS:  0000000000000000(0000) GS:ffff88802c100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f56c4da4 CR3: 0000000067ae8000 CR4: 0000000000350ef0
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:956 [inline]
 rcu_core+0x4f2/0x16b0 kernel/rcu/tree.c:2838
 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:csd_lock_wait kernel/smp.c:312 [inline]
RIP: 0010:smp_call_function_many_cond+0x4e7/0x1420 kernel/smp.c:856
Code: 0c 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 4b 2b 0c 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 f7 0c 00 00 8b 43 08 31
RSP: 0018:ffffc90000e3f068 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff88802c246560 RCX: ffffffff817ef68b
RDX: ffff88801a76c880 RSI: ffffffff817ef665 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffed1005848cad
R13: 0000000000000001 R14: ffff88802c246568 R15: ffff88802c13ffc0
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
 kvm_flush_tlb_multi+0x267/0x3b0 arch/x86/kernel/kvm.c:677
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:941 [inline]
 arch_tlbbatch_flush+0x264/0x310 arch/x86/mm/tlb.c:1260
 try_to_unmap_flush mm/rmap.c:650 [inline]
 try_to_unmap_flush_dirty+0xb9/0x140 mm/rmap.c:661
 shrink_folio_list+0x3130/0x41e0 mm/vmscan.c:1359
 evict_folios+0x6e0/0x1b30 mm/vmscan.c:4580
 try_to_shrink_lruvec+0x612/0x9b0 mm/vmscan.c:4775
 shrink_one+0x3e3/0x7b0 mm/vmscan.c:4813
 shrink_many mm/vmscan.c:4876 [inline]
 lru_gen_shrink_node+0x69f/0x1510 mm/vmscan.c:4954
 shrink_node mm/vmscan.c:5934 [inline]
 kswapd_shrink_node mm/vmscan.c:6762 [inline]
 balance_pgdat+0x110f/0x1950 mm/vmscan.c:6954
 kswapd+0x5ea/0xbf0 mm/vmscan.c:7223
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
----------------
Code disassembly (best guess):
   0:	0c 00                	or     $0x0,%al
   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 f4             	mov    %r14,%r12
  13:	4c 89 f5             	mov    %r14,%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 4b 2b 0c 00       	call   0xc2b73
  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 f7 0c 00 00    	jne    0xd33
  3c:	8b 43 08             	mov    0x8(%rbx),%eax
  3f:	31                   	.byte 0x31