rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 ticks this GP) idle=42e4/1/0x4000000000000000 softirq=19243/19252 fqs=1
rcu: 	(detected by 1, t=10505 jiffies, g=11401, q=958 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6242 Comm: sed Not tainted 6.16.0-rc5-next-20250710-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:103 [inline]
RIP: 0010:do_raw_spin_unlock+0xba/0x240 kernel/locking/spinlock_debug.c:141
Code: 06 0f 85 de 00 00 00 4c 8d 7b 08 4c 89 fd 48 c1 ed 03 42 0f b6 44 25 00 84 c0 0f 85 42 01 00 00 41 8b 07 65 8b 0d 9a b3 06 11 <39> c8 0f 85 d4 00 00 00 43 80 7c 25 00 00 74 08 4c 89 f7 e8 fe 1f
RSP: 0018:ffffc90000007c28 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888070bc32e8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888070bc32e8
RBP: 1ffff1100e17865e R08: ffff888070bc32eb R09: 1ffff1100e17865d
R10: dffffc0000000000 R11: ffffed100e17865e R12: dffffc0000000000
R13: 1ffff1100e17865f R14: ffff888070bc32f8 R15: ffff888070bc32f0
FS:  00007f20aa392c80(0000) GS:ffff888125bd0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20aa6fa000 CR3: 000000006d68a000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __raw_spin_unlock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_unlock+0x1e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 advance_sched+0x99f/0xc90 net/sched/sch_taprio.c:981
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210
Code: 89 fb e8 23 00 00 00 48 8b 3d 34 ee fd 0b 48 89 de 5b e9 53 e9 59 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 00 a5 92 65 8b 15 b8 49
RSP: 0018:ffffc90004bff4f8 EFLAGS: 00000293
RAX: ffffffff8b721cdb RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff888032001e00 RSI: 0000000000000001 RDI: 0000000000000004
RBP: ffffc90004bff6d0 R08: ffff888032001e00 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000000 R12: ffff88806d5dac00
R13: dffffc0000000000 R14: ffff88806d5db000 R15: 0000000000000001
 mas_data_end lib/maple_tree.c:1468 [inline]
 mt_validate_nulls lib/maple_tree.c:7567 [inline]
 mt_validate+0x3f6a/0x4380 lib/maple_tree.c:7615
 validate_mm+0xb6/0x4b0 mm/vma.c:651
 __split_vma+0x8bd/0xa00 mm/vma.c:569
 split_vma mm/vma.c:598 [inline]
 vma_modify+0x13b3/0x1970 mm/vma.c:1631
 vma_modify_flags+0x1e8/0x230 mm/vma.c:1649
 mprotect_fixup+0x400/0x9b0 mm/mprotect.c:658
 do_mprotect_pkey+0x8cd/0xce0 mm/mprotect.c:832
 __do_sys_mprotect mm/mprotect.c:853 [inline]
 __se_sys_mprotect mm/mprotect.c:850 [inline]
 __x64_sys_mprotect+0x80/0x90 mm/mprotect.c:850
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f20aa7292c7
Code: 89 3d fd 3f 01 00 eb 90 0f 1f 00 f7 d8 89 05 f0 3f 01 00 48 c7 c0 ff ff ff ff eb 91 0f 1f 80 00 00 00 00 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d c9 3f 01 00 f7 d8 89 01 48 83
RSP: 002b:00007ffe52385fe8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f20aa73cda0 RCX: 00007f20aa7292c7
RDX: 0000000000000001 RSI: 0000000000002000 RDI: 00007f20aa73a000
RBP: 00007ffe523862b0 R08: 000000003de00ec7 R09: 0000000000000000
R10: 00007f20aa46dc58 R11: 0000000000000206 R12: fffffffffffffff8
R13: 0000003688fad70c R14: 0000000000000000 R15: 00007f20aa73d310
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g11401 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=5221
rcu: rcu_preempt kthread starved for 10500 jiffies! g11401 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27128 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5314 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6697
 __schedule_loop kernel/sched/core.c:6775 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6790
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2062
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2264
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>