rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10585/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=36133, q=396 ncpus=2)
task:syz-executor state:R running task stack:20624 pid:10585 tgid:10585 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6869
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6893
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]
zap_pte_range mm/memory.c:1691 [inline]
zap_pmd_range mm/memory.c:1739 [inline]
zap_pud_range mm/memory.c:1768 [inline]
zap_p4d_range mm/memory.c:1789 [inline]
unmap_page_range+0x36b1/0x40e0 mm/memory.c:1810
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1900
exit_mmap+0x275/0xc40 mm/mmap.c:1874
__mmput+0x115/0x390 kernel/fork.c:1347
exit_mm+0x220/0x310 kernel/exit.c:571
do_exit+0x9b2/0x28e0 kernel/exit.c:926
do_group_exit+0x207/0x2c0 kernel/exit.c:1088
get_signal+0x16a3/0x1740 kernel/signal.c:2917
arch_do_signal_or_restart+0x96/0x860 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:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd880174257
RSP: 002b:00007ffd0c8fac70 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 00000000000000a1 RCX: 00007fd880174257
RDX: 0000000040000000 RSI: 00007ffd0c8faccc RDI: 00000000ffffffff
RBP: 00007ffd0c8faccc R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 00005555661375eb
R13: 0000555566137590 R14: 00000000000595f6 R15: 00007ffd0c8fad20
rcu: rcu_preempt kthread starved for 10497 jiffies! g36133 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:24912 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.12.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:32 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:147 [inline]
RIP: 0010:lock_acquire+0x237/0x550 kernel/locking/lockdep.c:5828
Code: 0f 85 a3 01 00 00 49 89 de 48 c1 eb 03 42 80 3c 2b 00 74 08 4c 89 f7 e8 f7 55 8e 00 48 c7 44 24 60 00 00 00 00 9c 8f 44 24 60 <42> 80 3c 2b 00 74 08 4c 89 f7 e8 ea 54 8e 00 f6 44 24 61 02 0f 85
RSP: 0018:ffffc90000007b00 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff92000000f6c RCX: 91637018a777e500
RDX: dffffc0000000000 RSI: ffffffff8c0adc20 RDI: ffffffff8c6101e0
RBP: ffffc90000007c48 R08: ffffffff942c980f R09: 1ffffffff2859301
R10: dffffc0000000000 R11: fffffbfff2859302 R12: 1ffff92000000f68
R13: dffffc0000000000 R14: ffffc90000007b60 R15: 0000000000000046
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31613ff8 CR3: 000000000e734000 CR4: 0000000000350ef0
Call Trace:
seqcount_lockdep_reader_access+0xfc/0x220 include/linux/seqlock.h:72
timekeeping_debug_get_ns kernel/time/timekeeping.c:256 [inline]
timekeeping_get_ns+0x5c/0x420 kernel/time/timekeeping.c:401
ktime_get_update_offsets_now+0x90/0x250 kernel/time/timekeeping.c:2449
hrtimer_update_base kernel/time/hrtimer.c:634 [inline]
hrtimer_run_softirq+0xa2/0x2c0 kernel/time/hrtimer.c:1771
handle_softirqs+0x2c7/0x980 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:schedule_debug kernel/sched/core.c:5887 [inline]
RIP: 0010:__schedule+0x16f/0x4bd0 kernel/sched/core.c:6564
Code: f6 48 8b 1b 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 58 74 30 f6 48 81 3b 9d 6e ac 57 <0f> 85 ee 1e 00 00 83 7c 24 50 00 7f 5e 48 8b 44 24 28 48 8d 58 18
RSP: 0018:ffffc900001578a0 EFLAGS: 00000246
RAX: 1ffff9200002a000 RBX: ffffc90000150000 RCX: dffffc0000000000
RDX: 0000000000000010 RSI: ffffffff8c6101c0 RDI: ffffffff8c610180
RBP: ffffc90000157ab0 R08: ffffc90000157a3f R09: ffffc90000157a30
R10: dffffc0000000000 R11: fffff5200002af48 R12: 1ffff9200002af58
R13: 1ffff9200002af5c R14: ffff8880b8600000 R15: dffffc0000000000
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7012
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:lock_is_held_type+0x13b/0x190
Code: 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 42 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90000157c38 EFLAGS: 00000206
RAX: 91637018a777e500 RBX: 0000000000000000 RCX: ffff88801cad5a00
RDX: 0000000000000000 RSI: ffffffff8c0adc20 RDI: ffffffff8c6101e0
RBP: ffffc90000157d90 R08: ffffffff901cfeaf R09: 1ffffffff2039fd5
R10: dffffc0000000000 R11: fffffbfff2039fd6 R12: 0000000000000246
R13: ffff88801cad5a00 R14: 00000000ffffffff R15: ffffffff8e937da0
lock_is_held include/linux/lockdep.h:249 [inline]
__might_resched+0xf4/0x780 kernel/sched/core.c:8615
run_ksoftirqd+0xe3/0x130 kernel/softirq.c:929
smpboot_thread_fn+0x546/0xa30 kernel/smpboot.c:164
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