rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=e57c/1/0x4000000000000000 softirq=111195/111198 fqs=135
	(detected by 0, t=10502 jiffies, g=158825, q=592 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 31348 Comm: syz-executor.2 Not tainted 6.1.36-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:advance_sched+0x5c8/0x940 net/sched/sch_taprio.c:744
Code: 48 89 df 48 c7 c6 10 99 b5 88 e8 d3 55 bd f8 eb 05 e8 7c 3b d4 f8 48 8b 1c 24 48 8d 7b 10 48 89 f8 48 c1 e8 03 42 80 3c 30 00 <74> 05 e8 b1 96 2a f9 4c 89 7b 10 43 0f b6 44 35 00 84 c0 4d 89 f4
RSP: 0018:ffffc900001e0cc0 EFLAGS: 00000046
RAX: 1ffff1100f44df92 RBX: ffff88807a26fc80 RCX: ffff8880298f0000
RDX: 0000000000010002 RSI: 0000000000000000 RDI: ffff88807a26fc90
RBP: 187254d430e4a9a8 R08: ffffffff88b59d1a R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff1100f44df95 R14: dffffc0000000000 R15: 187254d430e4a9a8
FS:  00007f7379854700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7379854718 CR3: 000000001fcbe000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 82 66 52 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 17 23 d0 f6 65 8b 05 f8 9e 74 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc900033ff8c0 EFLAGS: 00000206
RAX: 4dc0db96f7d10200 RBX: 1ffff9200067ff1c RCX: ffffffff91a84103
RDX: dffffc0000000000 RSI: ffffffff8aebd1a0 RDI: 0000000000000001
RBP: ffffc900033ff960 R08: dffffc0000000000 R09: ffffed100f02a812
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff9200067ff18 R14: ffffc900033ff8e0 R15: 0000000000000246
 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline]
 timerfd_clock_was_set+0x1b3/0x2a0 fs/timerfd.c:113
 clock_was_set+0x86e/0x900 kernel/time/hrtimer.c:980
 timekeeping_inject_offset+0x65f/0x710 kernel/time/timekeeping.c:1395
 do_adjtimex+0x511/0xaa0 kernel/time/timekeeping.c:2444
 do_clock_adjtime kernel/time/posix-timers.c:1122 [inline]
 __do_sys_clock_adjtime kernel/time/posix-timers.c:1134 [inline]
 __se_sys_clock_adjtime kernel/time/posix-timers.c:1125 [inline]
 __x64_sys_clock_adjtime+0x1dc/0x290 kernel/time/posix-timers.c:1125
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7378a8c389
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:00007f7379854168 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f7378bac050 RCX: 00007f7378a8c389
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f7378ad7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc7aa0f67f R14: 00007f7379854300 R15: 0000000000022000
 </TASK>
rcu: rcu_preempt kthread starved for 10228 jiffies! g158825 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:26680 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x132c/0x4330 kernel/sched/core.c:6554
 schedule+0xbf/0x180 kernel/sched/core.c:6630
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860
 kthread+0x26e/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 25867 Comm: kworker/0:16 Not tainted 6.1.36-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: events fqdir_free_fn
RIP: 0010:__sanitizer_cov_trace_pc+0x58/0x60 kernel/kcov.c:225
Code: f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 <c3> 0f 1f 80 00 00 00 00 4c 8b 04 24 65 48 8b 15 f4 92 78 7e 65 8b
RSP: 0018:ffffc9001379f818 EFLAGS: 00000293
RAX: ffffffff817e845a RBX: 1ffff920026f3f21 RCX: ffff888022513b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9001379fba0 R08: ffffffff817e8434 R09: fffff520026f3ecd
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc9001379f908 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007eff985831b8 CR3: 000000003825f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 csd_lock_wait kernel/smp.c:413 [inline]
 smp_call_function_single+0x4ba/0x2610 kernel/smp.c:776
 rcu_barrier+0x323/0x5f0 kernel/rcu/tree.c:4017
 fqdir_free_fn+0x2e/0x130 net/ipv4/inet_fragment.c:163
 process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2289
 worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
 kthread+0x26e/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>