rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10499 ticks this GP) idle=7f7/1/0x4000000000000000 softirq=20180/20180 fqs=5066
(t=10500 jiffies g=31581 q=8743)
NMI backtrace for cpu 0
CPU: 0 PID: 7171 Comm: syz.5.597 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x397/0x3d0 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+0x6d8/0x1110 kernel/rcu/tree.c:2619
update_process_times+0x193/0x200 kernel/time/timer.c:1818
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:1690 [inline]
__hrtimer_run_queues+0x4fe/0xc40 kernel/time/hrtimer.c:1754
hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
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
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
RIP: 0010:_raw_spin_lock+0x25/0x40 kernel/locking/spinlock.c:154
Code: 00 00 00 00 90 53 48 89 fb bf 01 00 00 00 e8 72 17 9f f7 48 8d 7b 18 31 f6 31 d2 31 c9 41 b8 01 00 00 00 45 31 c9 ff 74 24 08 36 9f a9 f7 48 83 c4 08 48 89 df 5b e9 89 f1 aa f7 66 0f 1f 84
RSP: 0018:ffffc90002d9f988 EFLAGS: 00000246
RAX: 1ffff110050bddc5 RBX: ffff88805ca953a8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88805ca953c0
RBP: ffffc90002d9fc40 R08: 0000000000000001 R09: 0000000000000000
R10: ffffed100b952986 R11: 1ffff1100b952985 R12: dffffc0000000000
R13: ffffc90002d9faa8 R14: ffff88805ca95280 R15: 1ffff920005b3f55
spin_lock include/linux/spinlock.h:363 [inline]
xfs_reclaim_igrab fs/xfs/xfs_icache.c:855 [inline]
xfs_icwalk_igrab fs/xfs/xfs_icache.c:1618 [inline]
xfs_icwalk_ag+0x3a0/0x19a0 fs/xfs/xfs_icache.c:1696
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+0x14f/0x250 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+0x418/0x4d0 fs/namespace.c:1139
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: 0033:0x7f083f92634a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f083db8be68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffec RBX: 00007f083db8bef0 RCX: 00007f083f92634a
RDX: 00002000000002c0 RSI: 0000200000009740 RDI: 00007f083db8beb0
RBP: 00002000000002c0 R08: 00007f083db8bef0 R09: 0000000004000000
R10: 0000000004000000 R11: 0000000000000246 R12: 0000200000009740
R13: 00007f083db8beb0 R14: 0000000000009838 R15: 00002000000000c0
hrtimer: interrupt took 496023042 ns