rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=18945, q=30)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294959085-4294948583), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.1  R  running task    26760  9707   7219 0x00004000
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5961 [inline]
 sched_show_task.cold+0x2e2/0x343 kernel/sched/core.c:5936
 print_other_cpu_stall kernel/rcu/tree_stall.h:430 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:558 [inline]
 rcu_pending kernel/rcu/tree.c:3225 [inline]
 rcu_sched_clock_irq.cold+0xb9b/0xd00 kernel/rcu/tree.c:2296
 update_process_times+0x25/0x60 kernel/time/timer.c:1727
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x4e/0x140 kernel/time/tick-sched.c:1320
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x5ca/0xed0 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline]
 smp_apic_timer_interrupt+0x15b/0x600 arch/x86/kernel/apic/apic.c:1138
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:27 [inline]
RIP: 0010:__orc_find+0x6f/0xf0 arch/x86/kernel/unwind_orc.c:49
Code: 72 4d 4c 89 e2 48 29 ea 48 89 d0 48 c1 ea 3f 48 c1 f8 02 48 01 c2 48 d1 fa 48 8d 5c 95 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 48 48 63 13 48 01
RSP: 0018:ffffc90006987330 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff15405ef RBX: ffffffff8aa02f7c RCX: ffffffff81c02eb1
RDX: 0000000000000000 RSI: ffffffff8afe814c RDI: ffffffff8aa02f7c
RBP: ffffffff8aa02f7c R08: 000000000002bee8 R09: ffffffff8afe8152
R10: 000000000002bee8 R11: 000000000007001f R12: ffffffff8aa02f7c
R13: ffffffff8aa02f7c R14: ffffffff8aa02f7c R15: dffffc0000000000
 orc_find arch/x86/kernel/unwind_orc.c:173 [inline]
 unwind_next_frame+0x34b/0x19d0 arch/x86/kernel/unwind_orc.c:407
 arch_stack_walk+0x74/0xd0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123
 save_stack+0x1b/0x40 mm/kasan/common.c:49
 set_track mm/kasan/common.c:57 [inline]
 __kasan_kmalloc mm/kasan/common.c:495 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468
 kmem_cache_alloc_trace+0x153/0x7d0 mm/slab.c:3551
 kmalloc include/linux/slab.h:555 [inline]
 tty_alloc_file drivers/tty/tty_io.c:189 [inline]
 tty_open+0x13e/0xb40 drivers/tty/tty_io.c:2025
 chrdev_open+0x219/0x5c0 fs/char_dev.c:414
 do_dentry_open+0x4b6/0x12a0 fs/open.c:797
 do_open fs/namei.c:3229 [inline]
 path_openat+0x1e70/0x27f0 fs/namei.c:3346
 do_filp_open+0x192/0x260 fs/namei.c:3373
 do_sys_openat2+0x585/0x7d0 fs/open.c:1148
 do_sys_open+0xc3/0x140 fs/open.c:1164
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca29
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0c1fc5dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000004f8dc0 RCX: 000000000045ca29
RDX: 0000000000000802 RSI: 0000000020000840 RDI: ffffffffffffff9c
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000007fe R14: 00000000004cadb1 R15: 00007f0c1fc5e6d4
rcu: rcu_preempt kthread starved for 10502 jiffies! g18945 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    28848    10      2 0x80004000
Call Trace:
 schedule+0xd0/0x2a0 kernel/sched/core.c:4163
 schedule_timeout+0x35c/0x850 kernel/time/timer.c:1898
 rcu_gp_fqs_loop kernel/rcu/tree.c:1674 [inline]
 rcu_gp_kthread+0x9bf/0x1960 kernel/rcu/tree.c:1836
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352