rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=306c/1/0x4000000000000000 softirq=59807/59807 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=86745, q=392 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 15711 Comm: syz-executor.4 Not tainted 6.9.0-rc7-syzkaller-00136-gf4345f05c0df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:19 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:103 [inline]
RIP: 0010:lock_release+0x14a/0x9f0 kernel/locking/lockdep.c:5770
Code: 42 0f b6 04 38 84 c0 0f 85 d8 05 00 00 83 3b 00 0f 85 f1 04 00 00 4c 8d b4 24 b0 00 00 00 4c 89 f3 48 c1 eb 03 42 80 3c 3b 00 <74> 08 4c 89 f7 e8 fc b8 84 00 4c 89 6c 24 50 48 c7 84 24 b0 00 00
RSP: 0018:ffffc90000a08a60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 1ffff92000141162 RCX: ffffffff8172aac0
RDX: 0000000000000000 RSI: ffffffff8c1eae00 RDI: ffffffff8c1eadc0
RBP: ffffc90000a08b90 R08: ffffffff8fa7cdaf R09: 1ffffffff1f4f9b5
R10: dffffc0000000000 R11: fffffbfff1f4f9b6 R12: 1ffff92000141158
R13: ffffffff84ae95f5 R14: ffffc90000a08b10 R15: dffffc0000000000
FS:  000055558f7c1480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb1cc8d56c6 CR3: 000000007bc34000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
 _raw_spin_unlock_irqrestore+0x79/0x140 kernel/locking/spinlock.c:194
 debug_object_deactivate+0x2d5/0x390 lib/debugobjects.c:778
 debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
 debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:484
 __run_hrtimer kernel/time/hrtimer.c:1660 [inline]
 __hrtimer_run_queues+0x30f/0xd50 kernel/time/hrtimer.c:1756
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 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:PageTail include/linux/page-flags.h:285 [inline]
RIP: 0010:const_folio_flags include/linux/page-flags.h:313 [inline]
RIP: 0010:folio_test_idle include/linux/page-flags.h:635 [inline]
RIP: 0010:folio_mark_accessed+0x67a/0x11b0 mm/swap.c:502
Code: e8 9b 8d c5 ff 4c 89 ef be 08 00 00 00 e8 0e ec 26 00 f0 41 80 65 00 fb 4c 89 ef e8 c0 dc 0b 00 48 b8 00 00 00 00 00 fc ff df <41> 80 3c 07 00 74 08 4c 89 f7 e8 47 e9 26 00 49 8b 1e 48 89 de 48
RSP: 0018:ffffc90010a27570 EFLAGS: 00000293
RAX: dffffc0000000000 RBX: 00fff00000008124 RCX: ffff88802d6cda00
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000100 R08: ffffffff81d07570 R09: 1ffffd40002b3520
R10: dffffc0000000000 R11: fffff940002b3521 R12: 1ffffd40002b3520
R13: ffffea000159a900 R14: ffffea000159a908 R15: 1ffffd40002b3521
 __find_get_block+0x540/0x10d0 fs/buffer.c:1405
 bdev_getblk+0x38/0x610 fs/buffer.c:1423
 __getblk include/linux/buffer_head.h:355 [inline]
 sb_getblk include/linux/buffer_head.h:361 [inline]
 ext4_getblk+0x338/0x850 fs/ext4/inode.c:843
 ext4_bread+0x2e/0x180 fs/ext4/inode.c:889
 __ext4_read_dirblock+0xce/0x880 fs/ext4/namei.c:144
 ext4_add_entry+0x78c/0x25d0 fs/ext4/namei.c:2433
 ext4_add_nondir+0x8d/0x290 fs/ext4/namei.c:2792
 ext4_symlink+0x920/0xb50 fs/ext4/namei.c:3433
 vfs_symlink+0x137/0x2a0 fs/namei.c:4481
 do_symlinkat+0x222/0x3a0 fs/namei.c:4507
 __do_sys_symlinkat fs/namei.c:4523 [inline]
 __se_sys_symlinkat fs/namei.c:4520 [inline]
 __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4520
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8ef0e7d4e7
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe819f5788 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007ffe819f5850 RCX: 00007f8ef0e7d4e7
RDX: 00007f8ef0eca53f RSI: 00000000ffffff9c RDI: 00007f8ef0ec9533
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g86745 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=49001
rcu: rcu_preempt kthread starved for 10502 jiffies! g86745 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:24560 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x1796/0x4a00 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6838
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>