rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=49613, q=79)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294994492-4294983989), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.1  R  running task    26528 21553   8541 0x00004000
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5285 [inline]
 sched_show_task.cold+0x291/0x2fc kernel/sched/core.c:5260
 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:536 [inline]
 rcu_pending kernel/rcu/tree.c:2625 [inline]
 rcu_sched_clock_irq.cold+0xaaf/0xbfd kernel/rcu/tree.c:2161
 update_process_times+0x32/0x80 kernel/time/timer.c:1639
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1296
 __run_hrtimer kernel/time/hrtimer.c:1388 [inline]
 __hrtimer_run_queues+0x33b/0xdd0 kernel/time/hrtimer.c:1450
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1508
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1066
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806
 </IRQ>
RIP: 0010:__kernel_text_address+0x1/0x40 kernel/extable.c:94
Code: 89 e7 e8 92 98 30 00 0f b6 c0 eb e0 48 c7 c7 c4 f3 a0 89 e8 31 57 5e 00 e9 69 ff ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 <48> 89 e5 53 48 89 fb e8 03 ff ff ff 85 c0 75 18 48 81 fb 00 a0 ad
RSP: 0018:ffff888054d6f4e0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff888054d6f510 RCX: 0000000000000000
RDX: 1ffff1100a9adeab RSI: 1ffff1100a9ade00 RDI: ffffffff81c02aae
RBP: ffff888054d6f500 R08: 0000000000000001 R09: ffff888054d6f568
R10: ffff888054d6f538 R11: ffff888054d6f548 R12: ffff888054d6f558
R13: 0000000000000000 R14: ffff88805ae82300 R15: ffff8880aa4008c0
 arch_stack_walk+0x97/0xf0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xac/0xe0 kernel/stacktrace.c:123
 save_stack+0x23/0x90 mm/kasan/common.c:71
 set_track mm/kasan/common.c:79 [inline]
 __kasan_kmalloc mm/kasan/common.c:489 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462
 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:497
 slab_post_alloc_hook mm/slab.h:511 [inline]
 slab_alloc mm/slab.c:3311 [inline]
 __do_kmalloc mm/slab.c:3643 [inline]
 __kmalloc+0x145/0x740 mm/slab.c:3654
 kmalloc_array include/linux/slab.h:671 [inline]
 kcalloc include/linux/slab.h:682 [inline]
 iter_file_splice_write+0x16e/0xbd0 fs/splice.c:690
 do_splice_from fs/splice.c:848 [inline]
 direct_splice_actor+0x123/0x190 fs/splice.c:1020
 splice_direct_to_actor+0x366/0x970 fs/splice.c:975
 do_splice_direct+0x1da/0x2a0 fs/splice.c:1063
 do_sendfile+0x597/0xd00 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1525 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1511
 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4592c9
Code: fd 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6497540c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004592c9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 00008000fffffffe R11: 0000000000000246 R12: 00007f64975416d4
R13: 00000000004c689d R14: 00000000004db828 R15: 00000000ffffffff
rcu: rcu_preempt kthread starved for 10557 jiffies! g49613 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29224    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:2818 [inline]
 __schedule+0x7c5/0x1560 kernel/sched/core.c:3444
 schedule+0xa8/0x260 kernel/sched/core.c:3508
 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1807
 rcu_gp_fqs_loop kernel/rcu/tree.c:1589 [inline]
 rcu_gp_kthread+0x9b2/0x18b0 kernel/rcu/tree.c:1746
 kthread+0x354/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352