rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4543/1:b..l P5316/1:b..l P5113/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=9301, q=901 ncpus=2)
task:syz-executor.4 state:R running task stack:18704 pid:5113 tgid:5113 ppid:5108 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_pte_range mm/memory.c:1191 [inline]
copy_pmd_range+0x7aa1/0x84c0 mm/memory.c:1252
copy_pud_range mm/memory.c:1289 [inline]
copy_p4d_range mm/memory.c:1313 [inline]
copy_page_range+0x99f/0xe90 mm/memory.c:1411
dup_mmap kernel/fork.c:752 [inline]
dup_mm kernel/fork.c:1689 [inline]
copy_mm+0x128d/0x2020 kernel/fork.c:1738
copy_process+0x187a/0x3dc0 kernel/fork.c:2391
kernel_clone+0x226/0x8f0 kernel/fork.c:2798
__do_sys_clone kernel/fork.c:2941 [inline]
__se_sys_clone kernel/fork.c:2925 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2925
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0645879f13
RSP: 002b:00007ffeb6711af8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0645879f13
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055557be77750 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
task:syz-executor.0 state:R running task stack:24656 pid:5316 tgid:5315 ppid:5114 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:867 [inline]
RIP: 0010:count_memcg_event_mm+0x334/0x420 include/linux/memcontrol.h:1079
Code: 62 f3 b2 ff 4c 8b 6c 24 18 eb 1f e8 56 f3 b2 ff e8 01 9f a9 09 4d 85 f6 74 84 e8 47 f3 b2 ff fb 49 be 00 00 00 00 00 fc ff df 97 a5 a9 09 89 c3 31 ff 89 c6 e8 6c f7 b2 ff 85 db 74 10 e8 c3
RSP: 0018:ffffc90004caf800 EFLAGS: 00000246
RAX: ffffffff81e38b29 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90009a41000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc90004caf8d0 R08: ffffffff81e38a99 R09: 1ffffffff25f86de
R10: dffffc0000000000 R11: fffffbfff25f86df R12: 0000000000000046
R13: ffffffff81e38894 R14: dffffc0000000000 R15: 1ffff92000995f04
mm_account_fault mm/memory.c:5646 [inline]
handle_mm_fault+0x16c4/0x1ba0 mm/memory.c:5793
faultin_page mm/gup.c:1339 [inline]
__get_user_pages+0x6ef/0x1590 mm/gup.c:1638
populate_vma_page_range+0x264/0x330 mm/gup.c:2078
__mm_populate+0x27a/0x460 mm/gup.c:2181
mm_populate include/linux/mm.h:3446 [inline]
__do_sys_mlockall mm/mlock.c:777 [inline]
__se_sys_mlockall+0x3e3/0x4d0 mm/mlock.c:753
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb9ac7cee9
RSP: 002b:00007fdb9bab00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000097
RAX: ffffffffffffffda RBX: 00007fdb9adb3fa0 RCX: 00007fdb9ac7cee9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 00007fdb9acc947f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fdb9adb3fa0 R15: 00007ffc4eb8bfd8
task:udevd state:R running task stack:24272 pid:4543 tgid:4543 ppid:1 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
lockref_get_not_dead+0x78/0xc0 lib/lockref.c:190
__legitimize_path fs/namei.c:710 [inline]
legitimize_path fs/namei.c:720 [inline]
legitimize_root fs/namei.c:748 [inline]
try_to_unlazy+0x27f/0x5b0 fs/namei.c:783
may_lookup fs/namei.c:1721 [inline]
link_path_walk+0x2a4/0xea0 fs/namei.c:2273
path_openat+0x24a/0x3280 fs/namei.c:3807
do_filp_open+0x235/0x490 fs/namei.c:3838
do_sys_openat2+0x13e/0x1d0 fs/open.c:1409
do_sys_open fs/open.c:1424 [inline]
__do_sys_openat fs/open.c:1440 [inline]
__se_sys_openat fs/open.c:1435 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1435
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f0ef169a4
RSP: 002b:00007fff279856e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007f6f0ef169a4
RDX: 0000000000080000 RSI: 00007fff27985818 RDI: 00000000ffffff9c
RBP: 00007fff27985818 R08: 0000000000000008 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000
R13: 000055f785640b42 R14: 0000000000000001 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10455 jiffies! g9301 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:26448 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2029
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2231
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
sched: RT throttling activated