rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9602/1:b..l P9611/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=51321, q=905 ncpus=2)
task:syz.1.808 state:R running task stack:23800 pid:9611 tgid:9600 ppid:8949 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 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:ma_pivots lib/maple_tree.c:659 [inline]
RIP: 0010:mas_data_end lib/maple_tree.c:1449 [inline]
RIP: 0010:mt_validate_nulls lib/maple_tree.c:7549 [inline]
RIP: 0010:mt_validate+0x43c9/0x4aa0 lib/maple_tree.c:7596
Code: e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 99 04 00 00 44 0f b6 3b e9 0c 01 00 00 e8 2b cb e7 f5 49 8d 5d 08 07 e8 20 cb e7 f5 31 db 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00
RSP: 0018:ffffc900092c7760 EFLAGS: 00000287
RAX: ffffffff8bababc5 RBX: ffff888070b20c08 RCX: 0000000000040000
RDX: ffffc9000e92d000 RSI: 000000000000fa83 RDI: 000000000000fa84
RBP: ffffc900092c7950 R08: 0000000000000005 R09: ffffffff8babab75
R10: 0000000000000003 R11: ffff88801af95a00 R12: 1ffff92001258f0f
R13: ffff888070b20c00 R14: 0000000000000001 R15: ffff88802e3c01f0
validate_mm+0xe7/0x530 mm/mmap.c:329
mmap_region+0x1a61/0x2090 mm/mmap.c:3071
do_mmap+0x8f9/0x1010 mm/mmap.c:1468
vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588
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: 0033:0x7f23fdf779f9
RSP: 002b:00007f23fed79048 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f23fe106130 RCX: 00007f23fdf779f9
RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f23fdfe58ee R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f23fe106130 R15: 00007fffd1f914f8
task:syz.0.806 state:R running task stack:24992 pid:9602 tgid:9599 ppid:8944 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 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]
do_anonymous_page mm/memory.c:4614 [inline]
do_pte_missing mm/memory.c:3945 [inline]
handle_pte_fault+0x505e/0x6eb0 mm/memory.c:5522
__handle_mm_fault mm/memory.c:5665 [inline]
handle_mm_fault+0x1029/0x1980 mm/memory.c:5833
do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fd94703bc06
RSP: 002b:00007fd947ef84b0 EFLAGS: 00010206
RAX: 00000000006dc001 RBX: 00007fd947ef8550 RCX: 000000000000004c
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fd947ef85f0
RBP: 0000000000000102 R08: 00007fd93c800000 R09: 00000000006dc000
R10: 0000000000000000 R11: 00007fd947ef8560 R12: 0000000000000001
R13: 00007fd9471f8480 R14: 0000000000000000 R15: 00007fd947ef85f0
rcu: rcu_preempt kthread starved for 10208 jiffies! g51321 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:5188 [inline]
__schedule+0x1800/0x4a60 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:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.11.0-rc2-syzkaller-00004-gb446a2dae984 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 40 d7 03 00 48 f7 00 08 00 00 00 75 10 eb 07 0f 00 2d e5 0f b4 00 f3 0f 1e fa fb f4 e9 24 40 3a 00 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffffff8e607ca8 EFLAGS: 00000246
RAX: ffffffff8e694680 RBX: ffff888018eb6864 RCX: 00000000002c43e1
RDX: 0000000000000001 RSI: ffff888018eb6800 RDI: ffff888018eb6864
RBP: 000000000003a6b8 R08: ffff8880b9237c7b R09: 1ffff11017246f8f
R10: dffffc0000000000 R11: ffffffff8bb5fc90 R12: ffff88801cfe8800
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8f0dc680
FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32a1fffc CR3: 000000007e8cc000 CR4: 0000000000350ef0
Call Trace:
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702
cpuidle_enter_state+0x114/0x480 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:326
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
rest_init+0x2dc/0x300 init/main.c:747
start_kernel+0x47a/0x500 init/main.c:1103
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147