rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P11228/2:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=41105, q=2864862 ncpus=2)
task:syz.1.1437      state:R  running task     stack:25768 pid:11228 tgid:11228 ppid:5598   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1709/0x5530 kernel/sched/core.c:7231
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7553
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x231/0x350 kernel/locking/lockdep.c:5911
Code: ff ff ff e8 21 af a3 09 f7 44 24 10 00 02 00 00 0f 84 39 ff ff ff 65 48 8b 05 eb e9 fc 10 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 d0 7a a7 09 cc 48 8d 3d 28 cf 11
RSP: 0018:ffffc90006ba7a80 EFLAGS: 00000292
RAX: 8873af0346944300 RBX: 0000000000000001 RCX: 0000000000000046
RDX: ffffffff93522f90 RSI: ffffffff8daf031a RDI: ffffffff8bca7f80
RBP: ffff88801dad3e80 R08: 0000000000000008 R09: ffffffff95fd02f8
R10: 0000000098c681d0 R11: 00000000a395b18c R12: ffffffff8f8c9938
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000246
 rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56
 spin_lock include/linux/spinlock_rt.h:45 [inline]
 p9_pollwake+0x48/0x160 net/9p/trans_fd.c:499
 __wake_up_common kernel/sched/wait.c:108 [inline]
 __wake_up_common_lock+0x13a/0x1f0 kernel/sched/wait.c:125
 sock_def_wakeup+0x15e/0x270 net/core/sock.c:3631
 unix_release_sock+0x793/0xd00 net/unix/af_unix.c:711
 unix_release+0x92/0xd0 net/unix/af_unix.c:1182
 __sock_release+0xa0/0x1f0 net/socket.c:739
 sock_close+0x1c/0x30 net/socket.c:1541
 __fput+0x42a/0xa80 fs/file_table.c:512
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x1fa/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:316 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f182cfbde59
RSP: 002b:00007fff84304ee8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f182d247da0 RCX: 00007f182cfbde59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f182d247da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f182d247cb0 R11: 0000000000000246 R12: 00000000000a5f79
R13: 00007f182d245fac R14: 00000000000a5c7b R15: 00007fff84304ff0
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 7686 jiffies! g41105 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x1000
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=28957
rcu: rcu_preempt kthread starved for 7687 jiffies! g41105 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x1000 ->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:D stack:27176 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00080000