rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=f1b/1/0x4000000000000000 softirq=9231/9232 fqs=5119 
	(t=10500 jiffies g=10653 q=2951)
NMI backtrace for cpu 0
CPU: 0 PID: 5042 Comm: syz.4.23 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x22f/0x380 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x31d/0x5f0 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3936 [inline]
 rcu_sched_clock_irq+0x6ea/0x1120 kernel/rcu/tree.c:2619
 update_process_times+0x193/0x200 kernel/time/timer.c:2021
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4b4/0xb70 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_callee_save___pv_queued_spin_unlock+0x11/0x12
Code: 51 41 52 41 53 e8 5f 08 00 00 41 5b 41 5a 41 59 41 58 5f 5e 5a 59 c3 90 90 52 b8 01 00 00 00 31 d2 f0 0f b0 17 3c 01 75 02 5a <c3> 56 0f b6 f0 e8 c5 ff ff ff 5e 5a c3 66 90 55 48 89 e5 41 57 41
RSP: 0018:ffffc900035bf950 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff888057def1a8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888057def1a8
RBP: 1ffff1100afbde36 R08: ffff888057def1ab R09: 1ffff1100afbde35
R10: dffffc0000000000 R11: ffffed100afbde36 R12: dffffc0000000000
R13: 1ffff1100afbde37 R14: ffff888057def1b8 R15: ffff888057def1b0
 pv_queued_spin_unlock arch/x86/include/asm/paravirt.h:590 [inline]
 queued_spin_unlock arch/x86/include/asm/qspinlock.h:56 [inline]
 do_raw_spin_unlock+0x11d/0x230 kernel/locking/spinlock_debug.c:141
 __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline]
 _raw_spin_unlock+0x1a/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:404 [inline]
 xfs_iflags_clear fs/xfs/xfs_inode.h:140 [inline]
 xfs_reclaim_inode fs/xfs/xfs_icache.c:968 [inline]
 xfs_icwalk_process_inode fs/xfs/xfs_icache.c:1642 [inline]
 xfs_icwalk_ag+0xe5e/0x1a70 fs/xfs/xfs_icache.c:1724
 xfs_icwalk fs/xfs/xfs_icache.c:1773 [inline]
 xfs_reclaim_inodes+0x188/0x260 fs/xfs/xfs_icache.c:993
 xfs_unmount_flush_inodes fs/xfs/xfs_mount.c:554 [inline]
 xfs_unmountfs+0x155/0x260 fs/xfs/xfs_mount.c:1016
 xfs_fs_put_super+0x66/0x2b0 fs/xfs/xfs_super.c:1095
 generic_shutdown_super+0x130/0x300 fs/super.c:475
 kill_block_super+0x7c/0xe0 fs/super.c:1427
 deactivate_locked_super+0x93/0xf0 fs/super.c:335
 cleanup_mnt+0x42d/0x4e0 fs/namespace.c:1148
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f059db4c64a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f059cdb8e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffec RBX: 00007f059cdb8ee0 RCX: 00007f059db4c64a
RDX: 0000000020009800 RSI: 0000000020000140 RDI: 00007f059cdb8ea0
RBP: 0000000020009800 R08: 00007f059cdb8ee0 R09: 0000000001000000
R10: 0000000001000000 R11: 0000000000000246 R12: 0000000020000140
R13: 00007f059cdb8ea0 R14: 000000000000985b R15: 00000000200000c0
 </TASK>