------------[ cut here ]------------
WARNING: CPU: 1 PID: 48 at kernel/rcu/tree_stall.h:990 rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:990
Modules linked in:
CPU: 1 PID: 48 Comm: kworker/u4:3 Not tainted 6.7.0-rc3-syzkaller-00809-gd5449d59f10e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:rcu_check_gp_start_stall.part.0+0x1c4/0x4b0 kernel/rcu/tree_stall.h:990
Code: 88 5d 01 00 00 be 04 00 00 00 48 c7 c7 c0 5a 80 92 e8 80 5b 6d 00 b8 01 00 00 00 87 05 25 3c 0f 11 85 c0 0f 85 39 01 00 00 90 <0f> 0b 90 48 81 fd c0 6e fb 8c 48 c7 c3 b8 29 19 8f 74 5a 48 b8 00
RSP: 0018:ffffc900001f0df0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000002904 RCX: ffffffff81711e90
RDX: fffffbfff2500b58 RSI: 0000000000000004 RDI: ffffffff92805ac0
RBP: ffffffff8cfb6ec0 R08: 0000000000000001 R09: fffffbfff2500b58
R10: 0000000000000003 R11: 0000000000000005 R12: 1ffffffff1981e40
R13: 0000000000000246 R14: ffffffff8cfb6ec0 R15: ffff8880b993d612
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54744c35c0 CR3: 000000000cd77000 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:953 [inline]
 rcu_core+0x4e1/0x1680 kernel/rcu/tree.c:2426
 __do_softirq+0x21a/0x8de 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+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x20 kernel/kcov.c:303
Code: e6 fe ff ff 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 c8 fe ff ff 0f 1f 84 00 00 00 00 00 <f3> 0f 1e fa 48 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 aa fe ff ff
RSP: 0018:ffffc90000b8f928 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880b98441a0 RCX: ffffffff817bd1e8
RDX: ffff888018245940 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000006 R12: ffffed1017308835
R13: 0000000000000001 R14: ffff8880b98441a8 R15: ffff8880b993d8c0
 csd_lock_wait kernel/smp.c:311 [inline]
 smp_call_function_many_cond+0x508/0x1550 kernel/smp.c:855
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2006 [inline]
 text_poke_bp_batch+0x22b/0x750 arch/x86/kernel/alternative.c:2216
 text_poke_flush arch/x86/kernel/alternative.c:2407 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:2404 [inline]
 text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2414
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x1d7/0x400 kernel/jump_label.c:829
 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:205
 static_key_enable+0x1a/0x20 kernel/jump_label.c:218
 toggle_allocation_gate mm/kfence/core.c:830 [inline]
 toggle_allocation_gate+0xf4/0x250 mm/kfence/core.c:822
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
----------------
Code disassembly (best guess), 4 bytes skipped:
   0:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
   6:	f3 0f 1e fa          	endbr64
   a:	48 8b 0c 24          	mov    (%rsp),%rcx
   e:	0f b7 d6             	movzwl %si,%edx
  11:	0f b7 f7             	movzwl %di,%esi
  14:	bf 03 00 00 00       	mov    $0x3,%edi
  19:	e9 c8 fe ff ff       	jmp    0xfffffee6
  1e:	0f 1f 84 00 00 00 00 	nopl   0x0(%rax,%rax,1)
  25:	00
* 26:	f3 0f 1e fa          	endbr64 <-- trapping instruction
  2a:	48 8b 0c 24          	mov    (%rsp),%rcx
  2e:	89 f2                	mov    %esi,%edx
  30:	89 fe                	mov    %edi,%esi
  32:	bf 05 00 00 00       	mov    $0x5,%edi
  37:	e9 aa fe ff ff       	jmp    0xfffffee6