rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8291
(detected by 0, t=10503 jiffies, g=6389, q=209)
syz-executor.0 R running task 24440 8291 8290 0x0000400a
Call Trace:
sched_show_task+0x40f/0x560 kernel/sched/core.c:5954
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:190 [inline]
print_other_cpu_stall kernel/rcu/tree_stall.h:398 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:538 [inline]
rcu_pending kernel/rcu/tree.c:2827 [inline]
rcu_sched_clock_irq+0x16b1/0x1ad0 kernel/rcu/tree.c:2271
update_process_times+0x12d/0x180 kernel/time/timer.c:1726
tick_sched_handle kernel/time/tick-sched.c:167 [inline]
tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310
__run_hrtimer kernel/time/hrtimer.c:1514 [inline]
__hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1576
hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1638
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:check_kcov_mode kernel/kcov.c:68 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x50 kernel/kcov.c:102
Code: 00 00 00 48 8b 3d 74 25 cd 07 48 89 de e8 64 02 3b 00 5b 5d c3 cc 48 8b 04 24 65 48 8b 0c 25 c0 1d 02 00 65 8b 15 b8 81 8b 7e c2 00 01 1f 00 75 2c 8b 91 80 13 00 00 83 fa 02 75 21 48 8b 91
RSP: 0018:ffffc90001ef7928 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81486ea4 RBX: ffffea00026cd840 RCX: ffff8880a3dd8340
RDX: 0000000000000001 RSI: 00000000fffffffc RDI: ffffea00026cd840
RBP: ffffc90001ef7968 R08: dffffc0000000000 R09: fffffbfff120248a
R10: fffffbfff120248a R11: 0000000000000000 R12: ffff888090b7bea0
R13: dffffc0000000000 R14: 1ffff1101216f7d4 R15: ffff888095a31928
release_task_stack kernel/fork.c:440 [inline]
put_task_stack+0xa3/0x130 kernel/fork.c:451
finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256
context_switch kernel/sched/core.c:3388 [inline]
__schedule+0x9a8/0xcc0 kernel/sched/core.c:4081
preempt_schedule_notrace+0xdb/0x120 kernel/sched/core.c:4309
___preempt_schedule_notrace+0x16/0x27 arch/x86/entry/thunk_64.S:51
rcu_is_watching+0x82/0xa0 kernel/rcu/tree.c:923
rcu_read_unlock include/linux/rcupdate.h:667 [inline]
memcg_kmem_get_cache+0x301/0x590 mm/memcontrol.c:2808
slab_pre_alloc_hook mm/slab.h:572 [inline]
slab_alloc_node mm/slab.c:3227 [inline]
kmem_cache_alloc_node+0x94/0x280 mm/slab.c:3575
alloc_task_struct_node kernel/fork.c:169 [inline]
dup_task_struct+0x55/0x910 kernel/fork.c:868
copy_process+0x4c5/0x5510 kernel/fork.c:1911
_do_fork+0x13e/0x660 kernel/fork.c:2421
__do_sys_clone kernel/fork.c:2576 [inline]
__se_sys_clone kernel/fork.c:2557 [inline]
__x64_sys_clone+0x20b/0x250 kernel/fork.c:2557
do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458c4a
Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00
RSP: 002b:00007ffd26a74a80 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffd26a74a80 RCX: 0000000000458c4a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffd26a74ac0 R08: 0000000000000001 R09: 000000000180e940
R10: 000000000180ec10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffd26a74b10
rcu: rcu_preempt kthread starved for 4925 jiffies! g6389 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt R running task 29032 10 2 0x80004000
Call Trace:
context_switch kernel/sched/core.c:3385 [inline]
__schedule+0x9a0/0xcc0 kernel/sched/core.c:4081
schedule+0x181/0x210 kernel/sched/core.c:4155
schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895
rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline]
rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821
kthread+0x332/0x350 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352