rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=11793, q=982 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294964682-4294954179), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g11793 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:28272 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xee1/0x59f0 kernel/sched/core.c:6710
 schedule+0xe7/0x1b0 kernel/sched/core.c:6786
 schedule_timeout+0x157/0x2c0 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1ec/0xa50 kernel/rcu/tree.c:1609
 rcu_gp_kthread+0x249/0x380 kernel/rcu/tree.c:1808
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 5069 Comm: syz-executor.1 Not tainted 6.5.0-rc1-syzkaller-00338-gd3750076d464 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x70 kernel/kcov.c:206
Code: ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 8b 05 5d 3d 7d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 <65> 48 8b 14 25 80 b9 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82
RSP: 0018:ffffc900001e0c38 EFLAGS: 00000206
RAX: 0000000000000101 RBX: 00000000000047af RCX: 0000000000000100
RDX: 1ffff920029feb85 RSI: ffffffff8858ed9a RDI: 0000000000000001
RBP: ffff888078bc8350 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000094000 R12: dffffc0000000000
R13: 0000000000000007 R14: ffffed100f17905a R15: 000000000000f99d
FS:  000055555655b480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556564938 CR3: 00000000491fa000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 fq_pie_timer+0x1da/0x4f0 net/sched/sch_fq_pie.c:387
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x218/0x965 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+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:write_comp_data+0x3c/0x90 kernel/kcov.c:236
Code: 01 00 00 49 89 f8 65 48 8b 14 25 80 b9 03 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 04 16 00 00 85 c0 74 4f 8b 82 e0 15 00 00 <83> f8 03 75 44 48 8b 82 e8 15 00 00 8b 92 e4 15 00 00 48 8b 38 48
RSP: 0018:ffffc9000468fb08 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888048cc0028 RCX: ffffffff8237f7d6
RDX: ffff88801293bb80 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000094000 R12: 0000000000000000
R13: 0000000000000010 R14: ffff88804144dcb0 R15: 0000000000000014
 ext4_rec_len_to_disk fs/ext4/ext4.h:2408 [inline]
 ext4_generic_delete_entry+0x236/0x300 fs/ext4/namei.c:2680
 ext4_delete_entry+0x2c9/0x480 fs/ext4/namei.c:2734
 __ext4_unlink+0x7f1/0xcd0 fs/ext4/namei.c:3271
 ext4_unlink+0x40b/0x580 fs/ext4/namei.c:3319
 vfs_unlink+0x2f1/0x900 fs/namei.c:4329
 do_unlinkat+0x3da/0x6d0 fs/namei.c:4395
 __do_sys_unlink fs/namei.c:4443 [inline]
 __se_sys_unlink fs/namei.c:4441 [inline]
 __x64_sys_unlink+0xc8/0x110 fs/namei.c:4441
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f57fb47c2d7
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 57 00 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:00007ffe32171898 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f57fb47c2d7
RDX: 00007ffe321718c0 RSI: 00007ffe32171950 RDI: 00007ffe32171950
RBP: 00007ffe32171950 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffe32172a10
R13: 00007f57fb4c73b9 R14: 0000000000029885 R15: 000000000000001e
 </TASK>