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WARNING: CPU: 1 PID: 9209 at kernel/rcu/tree_stall.h:989 rcu_check_gp_start_stall+0x2cf/0x460 kernel/rcu/tree_stall.h:989
Modules linked in:
CPU: 1 UID: 0 PID: 9209 Comm: syz.2.883 Not tainted 6.14.0-rc3-syzkaller-g9aa8fe29f624 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:rcu_check_gp_start_stall+0x2cf/0x460 kernel/rcu/tree_stall.h:989
Code: c7 e0 8e 6c 9a be 04 00 00 00 e8 ec 08 82 00 b8 01 00 00 00 87 05 41 84 c3 18 85 c0 0f 85 1a ff ff ff 48 c7 c0 00 40 b4 8e 90 <0f> 0b 90 49 39 c7 74 47 48 c7 c0 30 c8 3e 90 48 c1 e8 03 42 0f b6
RSP: 0018:ffffc90000a18bb8 EFLAGS: 00010046
RAX: ffffffff8eb44000 RBX: 000000010000100d RCX: ffffffff81a90a94
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff9a6c8ee0
RBP: ffffc90000a18e10 R08: 0000000000000003 R09: fffffbfff34d91dc
R10: dffffc0000000000 R11: fffffbfff34d91dc R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000246 R15: ffffffff8eb44000
FS:  0000555557f3e500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3b4f2f CR3: 000000005e2ee000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_core+0x650/0x17a0 kernel/rcu/tree.c:2797
 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:kvm_wait+0x250/0x2c0 arch/x86/kernel/kvm.c:1064
Code: 3b 45 0f b6 f6 44 89 ff 44 89 f6 e8 5a 99 56 00 e8 e5 69 5e 00 45 38 f7 75 15 66 90 e8 c9 98 56 00 0f 00 2d 62 83 bb 0a fb f4 <e9> 50 fe ff ff e8 b6 98 56 00 fb e9 45 fe ff ff 89 d9 80 e1 07 38
RSP: 0018:ffffc900042af9e0 EFLAGS: 000002d3
RAX: ffffffff816c85f7 RBX: ffff888148c7f7d8 RCX: ffff88802caf3c00
RDX: 0000000000000000 RSI: ffffffff8c2afd00 RDI: ffffffff8c8143c0
RBP: ffffc900042afab0 R08: ffffffff9457ece7 R09: 1ffffffff28afd9c
R10: dffffc0000000000 R11: fffffbfff28afd9d R12: 1ffff92000855f40
R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000003
 pv_wait arch/x86/include/asm/paravirt.h:589 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline]
 __pv_queued_spin_lock_slowpath+0x8d2/0xdb0 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:577 [inline]
 queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116
 spin_lock include/linux/spinlock.h:351 [inline]
 lock_for_kill+0xdc/0x210 fs/dcache.c:693
 dput+0x18a/0x2b0 fs/dcache.c:883
 __fput+0x60b/0x9f0 fs/file_table.c:472
 task_work_run+0x24f/0x310 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa42b38d169
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:00007ffe102268b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000003a1b3 RCX: 00007fa42b38d169
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fa42b5a7ba0 R08: 0000000000000001 R09: 0000000c10226baf
R10: 00007fa42b200000 R11: 0000000000000246 R12: 00007fa42b5a5fac
R13: 00007fa42b5a5fa0 R14: ffffffffffffffff R15: 00007ffe102269d0
 </TASK>
----------------
Code disassembly (best guess):
   0:	3b 45 0f             	cmp    0xf(%rbp),%eax
   3:	b6 f6                	mov    $0xf6,%dh
   5:	44 89 ff             	mov    %r15d,%edi
   8:	44 89 f6             	mov    %r14d,%esi
   b:	e8 5a 99 56 00       	call   0x56996a
  10:	e8 e5 69 5e 00       	call   0x5e69fa
  15:	45 38 f7             	cmp    %r14b,%r15b
  18:	75 15                	jne    0x2f
  1a:	66 90                	xchg   %ax,%ax
  1c:	e8 c9 98 56 00       	call   0x5698ea
  21:	0f 00 2d 62 83 bb 0a 	verw   0xabb8362(%rip)        # 0xabb838a
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	e9 50 fe ff ff       	jmp    0xfffffe7f <-- trapping instruction
  2f:	e8 b6 98 56 00       	call   0x5698ea
  34:	fb                   	sti
  35:	e9 45 fe ff ff       	jmp    0xfffffe7f
  3a:	89 d9                	mov    %ebx,%ecx
  3c:	80 e1 07             	and    $0x7,%cl
  3f:	38                   	.byte 0x38