rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=1ffc/1/0x4000000000000000 softirq=61451/61455 fqs=2450
rcu: 	(detected by 0, t=10502 jiffies, g=68109, q=2013 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 19653 Comm: syz-executor.3 Not tainted 6.4.0-rc7-syzkaller-00204-g61dabacdad4e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:__lock_acquire+0x3ab/0x5f30 kernel/locking/lockdep.c:5025
Code: 04 00 09 c1 8b 84 24 70 01 00 00 41 09 c9 c1 e0 14 41 09 c1 8b 84 24 60 01 00 00 c1 e0 15 41 09 c1 41 8b 47 20 25 ff 1f 00 00 <41> 09 c1 48 b8 00 00 00 00 00 fc ff df 45 89 4f 20 0f b6 14 02 48
RSP: 0018:ffffc900001e0a98 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 1ffff9200003c184 RCX: 0000000000044000
RDX: 1ffff11004f69167 RSI: 0000000000000000 RDI: ffff888027b48b3c
RBP: ffff888027b48000 R08: 0000000000000000 R09: 00000000000c4000
R10: 1ffff11004f69162 R11: 0000000000094001 R12: ffffffff91fb00d8
R13: 0000000000000000 R14: ffff888027b48af0 R15: ffff888027b48b18
FS:  00007fedd4f67700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fedd4f67718 CR3: 000000007e694000 CR4: 0000000000350ee0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire kernel/locking/lockdep.c:5705 [inline]
 lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
 debug_object_activate+0x186/0x4f0 lib/debugobjects.c:708
 debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
 debug_activate kernel/time/hrtimer.c:475 [inline]
 enqueue_hrtimer+0x27/0x320 kernel/time/hrtimer.c:1084
 __run_hrtimer kernel/time/hrtimer.c:1702 [inline]
 __hrtimer_run_queues+0xa5b/0xbe0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x320/0x7b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x3c/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 66 8f 51 f7 48 89 ef e8 8e fd 51 f7 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> ff d2 43 f7 65 8b 05 60 61 ef 75 85 c0 74 0a 5b 5d c3 e8 9c 8c
RSP: 0018:ffffc9000465fa98 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff22a58d6
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8880b982b840 R08: 0000000000000001 R09: ffffffff9152bd07
R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000004
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
 clock_was_set+0x610/0x810 kernel/time/hrtimer.c:970
 timekeeping_inject_offset+0x4b4/0x620 kernel/time/timekeeping.c:1395
 do_adjtimex+0x333/0xa40 kernel/time/timekeeping.c:2444
 do_clock_adjtime kernel/time/posix-timers.c:1122 [inline]
 __do_sys_clock_adjtime+0x163/0x270 kernel/time/posix-timers.c:1134
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fedd428c389
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fedd4f67168 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007fedd43ac050 RCX: 00007fedd428c389
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007fedd42d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdfa422e4f R14: 00007fedd4f67300 R15: 0000000000022000
 </TASK>
rcu: rcu_preempt kthread starved for 5554 jiffies! g68109 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:28320 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0xc9a/0x5880 kernel/sched/core.c:6669
 schedule+0xde/0x1a0 kernel/sched/core.c:6745
 schedule_timeout+0x14e/0x2b0 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1609
 rcu_gp_kthread+0x23a/0x360 kernel/rcu/tree.c:1808
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 8610 Comm: syz-executor.3 Not tainted 6.4.0-rc7-syzkaller-00204-g61dabacdad4e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data+0xf/0x90 kernel/kcov.c:236
Code: 65 48 8b 04 25 c0 b9 03 00 48 8b 80 00 16 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 65 8b 05 91 75 7f 7e 49 89 f1 89 c6 49 89 d2 <81> e6 00 01 00 00 49 89 f8 65 48 8b 14 25 c0 b9 03 00 a9 00 01 ff
RSP: 0018:ffffc900032bf8b0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880b9943020 RCX: ffffffff81790583
RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff81d6f0d2 R12: ffffed1017328605
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000063fc0 CR3: 000000000c571000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 csd_lock_wait kernel/smp.c:285 [inline]
 smp_call_function_many_cond+0x6a3/0x15a0 kernel/smp.c:828
 on_each_cpu_cond_mask+0x5a/0xa0 kernel/smp.c:996
 kill_bdev block/bdev.c:75 [inline]
 blkdev_flush_mapping+0x148/0x320 block/bdev.c:596
 blkdev_put_whole+0xcb/0xf0 block/bdev.c:627
 blkdev_put+0x220/0x780 block/bdev.c:887
 deactivate_locked_super+0x98/0x160 fs/super.c:331
 deactivate_super+0xb1/0xd0 fs/super.c:362
 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xaa3/0x29b0 kernel/exit.c:874
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024
 get_signal+0x2318/0x25b0 kernel/signal.c:2876
 arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:301
RIP: 0033:0x7fedd428c389
Code: Unable to access opcode bytes at 0x7fedd428c35f.
RSP: 002b:00007fedd4f88118 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: 0000000000000000 RBX: 00007fedd43abf80 RCX: 00007fedd428c389
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fedd42d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdfa422e4f R14: 00007fedd4f88300 R15: 0000000000022000
 </TASK>