rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10320/1:b..l P5867/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=31745, q=1217 ncpus=2)
task:kworker/0:4 state:R running task stack:22376 pid:5867 tgid:5867 ppid:2 task_flags:0x4208060 flags:0x00004000
Workqueue: events free_obj_work
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:842 [inline]
RIP: 0010:class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
RIP: 0010:unwind_next_frame+0xa36/0x20a0 arch/x86/kernel/unwind_orc.c:479
Code: 65 0c 00 0f 84 6d f9 ff ff 80 3d 44 9f 40 12 00 0f 85 60 f9 ff ff 4c 89 ef c6 05 34 9f 40 12 01 e8 cf f0 ff ff e9 4c f9 ff ff 65 0c 37 00 84 c0 0f 85 9c f6 ff ff e8 e8 52 03 0a 85 c0 0f 84
RSP: 0018:ffffc9000b15f6c8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 00000000969a51c3
RDX: ffffffff8169da1d RSI: ffffffff8dbbee3b RDI: ffffffff8bf4a4a0
RBP: ffffc9000b15f7d0 R08: 6cf1d145b5a2467e R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: fffff5200162bef3
R13: ffffc9000b15f788 R14: ffffc9000b15f788 R15: ffffc9000b15f790
__unwind_start+0x45f/0x7f0 arch/x86/kernel/unwind_orc.c:758
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x73/0x100 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kmem_cache_free+0x2d4/0x4d0 mm/slub.c:4744
free_object_list.isra.0+0xf8/0x2a0 lib/debugobjects.c:326
free_obj_work+0x18c/0x390 lib/debugobjects.c:513
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz.0.1001 state:R running task stack:28072 pid:10320 tgid:10316 ppid:5816 task_flags:0x40054c flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 06 60 55 00 48 89 df 5b e9 8d bc 5a 00 be 03 00 00 00 5b e9 12 fa 15 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 34 24 65 48 8b 15 18 1a e9 11 65 8b 05 29 1a e9
RSP: 0018:ffffc90004fb7918 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff88801e494430 RCX: ffffffff822ab2c3
RDX: ffff88802c218000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000007 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000001e602d4 R11: 0000000000000000 R12: 0000000001e602d4
R13: 0000000000000008 R14: ffff88801e494438 R15: 0000000000000003
__update_page_owner_free_handle.constprop.0+0x15d/0x470 mm/page_owner.c:276
__reset_page_owner+0x93/0x1a0 mm/page_owner.c:309
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1258 [inline]
__free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2721
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4147 [inline]
slab_alloc_node mm/slub.c:4196 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4203
taskstats_tgid_alloc kernel/taskstats.c:576 [inline]
taskstats_exit+0x654/0xbe0 kernel/taskstats.c:615
do_exit+0x85f/0x2c30 kernel/exit.c:938
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
get_signal+0x2673/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f494d18e969
RSP: 002b:00007f494df210e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f494d3b6088 RCX: 00007f494d18e969
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f494d3b6088
RBP: 00007f494d3b6080 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f494d3b608c
R13: 0000000000000000 R14: 00007ffec4eca000 R15: 00007ffec4eca0e8