rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P20408/1:b..l P20414/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=124977, q=675 ncpus=2)
task:modprobe state:R running task stack:26448 pid:20414 tgid:20414 ppid:18433 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
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:mas_mn lib/maple_tree.c:314 [inline]
RIP: 0010:mas_next_node+0xde/0xf40 lib/maple_tree.c:4563
Code: ff ff 31 ff 89 c5 89 c6 e8 0f fb b9 f6 85 ed 0f 85 fb 07 00 00 e8 02 00 ba f6 48 8d 43 18 41 83 c6 01 48 89 c2 48 89 44 24 30 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 7b 0c
RSP: 0018:ffffc900031f76e0 EFLAGS: 00000202
RAX: ffffc900031f77b0 RBX: ffffc900031f7798 RCX: ffffffff8ad3e401
RDX: ffffc900031f77b0 RSI: ffffffff8ad3e40e RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 000000000000000f R14: 0000000000000001 R15: ffff88806ea1d1f0
mt_validate_nulls+0x72e/0x9e0 lib/maple_tree.c:7553
mt_validate+0x3148/0x4390 lib/maple_tree.c:7599
validate_mm+0x9c/0x4b0 mm/mmap.c:288
__split_vma+0xd68/0x11c0 mm/mmap.c:2440
split_vma mm/mmap.c:2466 [inline]
vma_modify+0x2b9/0x360 mm/mmap.c:2507
vma_modify_flags include/linux/mm.h:3352 [inline]
mprotect_fixup+0x220/0xc40 mm/mprotect.c:637
do_mprotect_pkey+0x9d7/0xd70 mm/mprotect.c:820
__do_sys_mprotect mm/mprotect.c:841 [inline]
__se_sys_mprotect mm/mprotect.c:838 [inline]
__x64_sys_mprotect+0x78/0xc0 mm/mprotect.c:838
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ba802fbb7
RSP: 002b:00007fff34efa058 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f6ba8043ab0 RCX: 00007f6ba802fbb7
RDX: 0000000000000001 RSI: 0000000000002000 RDI: 00007f6ba8041000
RBP: 00007fff34efa170 R08: 00007fff34ef0000 R09: 00007f6ba800c5c0
R10: 00007f6ba8014858 R11: 0000000000000206 R12: 00007f6ba8043ab0
R13: 00007f6ba8037eda R14: 00007f6ba80429f0 R15: 00007f6ba8042f40
task:syz.4.4229 state:R running task stack:25712 pid:20408 tgid:20400 ppid:19285 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6924
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]
wp_page_copy mm/memory.c:3386 [inline]
do_wp_page+0x1554/0x3340 mm/memory.c:3677
handle_pte_fault mm/memory.c:5397 [inline]
__handle_mm_fault+0x2311/0x5430 mm/memory.c:5524
handle_mm_fault+0x476/0xa00 mm/memory.c:5689
do_user_addr_fault+0x2e5/0xe50 arch/x86/mm/fault.c:1389
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc900033b7958 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000000e80
RDX: 0000000000000000 RSI: ffff888012e70180 RDI: 00000000200e1000
RBP: 0000000000001000 R08: 0000000000000000 R09: ffffed10025ce1ff
R10: ffff888012e70fff R11: 0000000000000000 R12: 00000000000e0b80
R13: ffffc900033b7d50 R14: ffff888012e70000 R15: 00000000200e0e80
copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline]
copy_to_user_iter lib/iov_iter.c:25 [inline]
iterate_iovec include/linux/iov_iter.h:51 [inline]
iterate_and_advance2 include/linux/iov_iter.h:247 [inline]
iterate_and_advance include/linux/iov_iter.h:271 [inline]
_copy_to_iter+0x4d2/0x1140 lib/iov_iter.c:185
copy_page_to_iter lib/iov_iter.c:362 [inline]
copy_page_to_iter+0xf1/0x180 lib/iov_iter.c:349
process_vm_rw_pages mm/process_vm_access.c:45 [inline]
process_vm_rw_single_vec mm/process_vm_access.c:118 [inline]
process_vm_rw_core.constprop.0+0x5c9/0xa10 mm/process_vm_access.c:216
process_vm_rw+0x301/0x360 mm/process_vm_access.c:284
__do_sys_process_vm_readv mm/process_vm_access.c:296 [inline]
__se_sys_process_vm_readv mm/process_vm_access.c:292 [inline]
__x64_sys_process_vm_readv+0xe2/0x1c0 mm/process_vm_access.c:292
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb82f375b99
RSP: 002b:00007fb830131048 EFLAGS: 00000246 ORIG_RAX: 0000000000000136
RAX: ffffffffffffffda RBX: 00007fb82f504078 RCX: 00007fb82f375b99
RDX: 0000000000000002 RSI: 0000000020008400 RDI: 0000000000000085
RBP: 00007fb82f3f677e R08: 0000000000000286 R09: 0000000000000000
R10: 0000000020008640 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb82f504078 R15: 00007ffd3a8f1148
rcu: rcu_preempt kthread starved for 10401 jiffies! g124977 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27584 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112