rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=a05c/1/0x4000000000000000 softirq=18426/18426 fqs=0
rcu: 	(detected by 0, t=10506 jiffies, g=12705, q=410 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6206 Comm: rm Not tainted 6.15.0-rc6-syzkaller-g5723cc3450bc #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x55/0xb0 kernel/rcu/tree.c:736
Code: 1c 97 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 8c d2 7a 00 48 c7 c3 58 0b 77 92 49 03 1e 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 69 c6 ce 10 74 11 83 e0
RSP: 0018:ffffc90000a08ba0 EFLAGS: 00000012
RAX: 1ffff1101712656b RBX: ffff8880b8932b58 RCX: 206687b0d45f0d00
RDX: 0000000000000000 RSI: ffffffff8bc1f3a0 RDI: ffffffff8bc1f360
RBP: ffffffff8977fb84 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff8977fac0 R12: 0000000000000000
R13: ffff8880345ee300 R14: ffffffff8d971c28 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881261c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fce2cfd4a10 CR3: 0000000032a28000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0x5f/0x360 kernel/locking/lockdep.c:5829
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xc4/0xc90 net/sched/sch_taprio.c:924
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x52c/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:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:vma_interval_tree_augment_compute_max mm/interval_tree.c:23 [inline]
RIP: 0010:vma_interval_tree_augment_propagate mm/interval_tree.c:23 [inline]
RIP: 0010:__rb_erase_augmented include/linux/rbtree_augmented.h:321 [inline]
RIP: 0010:rb_erase_augmented include/linux/rbtree_augmented.h:329 [inline]
RIP: 0010:rb_erase_augmented_cached include/linux/rbtree_augmented.h:340 [inline]
RIP: 0010:vma_interval_tree_remove+0x8d5/0x9a0 mm/interval_tree.c:23
Code: 3c 28 00 74 08 4c 89 e7 e8 18 86 1b 00 4d 8b 24 24 4d 85 e4 74 2b e8 aa 8b b9 ff 49 83 c4 18 4c 89 e0 48 c1 e8 03 80 3c 28 00 <74> 08 4c 89 e7 e8 f1 85 1b 00 49 8b 04 24 48 39 d8 48 0f 47 d8 eb
RSP: 0018:ffffc900043173f8 EFLAGS: 00000246
RAX: 1ffff110041f0b31 RBX: 0000000000000060 RCX: ffff888026ab0000
RDX: 0000000000000000 RSI: 0000000000000060 RDI: ffff88807f862780
RBP: dffffc0000000000 R08: ffff88802296382f R09: 1ffff1100452c705
R10: dffffc0000000000 R11: ffffed100452c706 R12: ffff888020f85988
R13: 0000000000000060 R14: ffff88807f862830 R15: 0000000000000000
 __remove_shared_vm_struct mm/vma.c:215 [inline]
 unlink_file_vma_batch_process+0x231/0x340 mm/vma.c:1688
 free_pgtables+0x5d5/0x710 mm/memory.c:394
 vms_clear_ptes+0x424/0x540 mm/vma.c:1189
 vms_clean_up_area mm/vma.c:1203 [inline]
 __mmap_prepare mm/vma.c:2340 [inline]
 __mmap_region mm/vma.c:2506 [inline]
 mmap_region+0x9e6/0x1e50 mm/vma.c:2597
 do_mmap+0xc68/0x1100 mm/mmap.c:561
 vm_mmap_pgoff+0x31b/0x4c0 mm/util.c:579
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:607
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce2d301242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffc1edbd998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fce2cfcc000 RCX: 00007fce2d301242
RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007fce2cfcc000
RBP: 0000000000000812 R08: 0000000000000003 R09: 000000000005f000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffc1edbda58
R13: 00007fce2cfd86b0 R14: 00007ffc1edbddd0 R15: 00000fff83db7b36
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g12705 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=6145
rcu: rcu_preempt kthread starved for 10506 jiffies! g12705 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27496 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2248
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4e/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>