rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P9598/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=140797, q=227 ncpus=2)
task:syz-executor.1  state:R  running task     stack:27264 pid:9598  tgid:9581  ppid:2940   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
 irqentry_exit+0x36/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x8/0x20 kernel/kcov.c:290
Code: 00 00 f3 0f 1e fa 48 8b 0c 24 48 89 f2 48 89 fe bf 06 00 00 00 e9 08 ff ff ff 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 8b 0c 24 <40> 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 e9 e6 fe ff ff 66 0f 1f 44
RSP: 0018:ffffc9000bb97488 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffffea0001a36300 RCX: ffffffff81e87bde
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000100cca
R13: 0000000004a10159 R14: 0000000000000001 R15: 0000000000000000
 rcu_read_lock include/linux/rcupdate.h:748 [inline]
 page_ext_get+0x1de/0x310 mm/page_ext.c:508
 __set_page_owner+0x2a/0x60 mm/page_owner.c:194
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1544 [inline]
 get_page_from_freelist+0xa25/0x36d0 mm/page_alloc.c:3312
 __alloc_pages+0x22e/0x2420 mm/page_alloc.c:4568
 alloc_pages_mpol+0x258/0x5f0 mm/mempolicy.c:2133
 shmem_alloc_folio+0x10d/0x140 mm/shmem.c:1613
 shmem_alloc_and_add_folio+0x147/0x7b0 mm/shmem.c:1653
 shmem_get_folio_gfp+0x623/0x1360 mm/shmem.c:2037
 shmem_get_folio mm/shmem.c:2119 [inline]
 shmem_write_begin+0x15a/0x360 mm/shmem.c:2702
 generic_perform_write+0x278/0x600 mm/filemap.c:3918
 shmem_file_write_iter+0x110/0x140 mm/shmem.c:2878
 call_write_iter include/linux/fs.h:2020 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x64f/0xdf0 fs/read_write.c:584
 ksys_write+0x12f/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fe0c407b82f
RSP: 002b:00007fe0c4cebe70 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007fe0c407b82f
RDX: 0000000001000000 RSI: 00007fe0ba7ff000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000012703
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000003
R13: 00007fe0c4cebf3c R14: 00007fe0c4cebf40 R15: 00007fe0ba7ff000
 </TASK>
rcu: rcu_preempt kthread starved for 10541 jiffies! g140797 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:27904 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_timeout+0x137/0x290 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9674 Comm: syz-executor.4 Not tainted 6.7.0-rc1-syzkaller-00019-gc42d9eeef8e5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:mark_lock+0x2e/0xc50 kernel/locking/lockdep.c:4638
Code: 41 57 41 56 41 89 d6 48 ba 00 00 00 00 00 fc ff df 41 55 41 54 53 48 83 e4 f0 48 81 ec 10 01 00 00 48 c7 44 24 30 b3 8a b5 41 <48> 8d 44 24 30 48 c7 44 24 38 68 03 82 8c 48 c1 e8 03 48 c7 44 24
RSP: 0018:ffffc9000bb87680 EFLAGS: 00000082
RAX: 000000000000000c RBX: ffff888034880b32 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffff888034880b10 RDI: ffff888034880000
RBP: ffffc9000bb877c0 R08: 0000000000000000 R09: fffffbfff23e31d0
R10: ffffffff91f18e87 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000008 R15: 0000000000000080
FS:  00007f5fee63d6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001280 CR3: 0000000027020000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 mark_usage kernel/locking/lockdep.c:4598 [inline]
 __lock_acquire+0x981/0x3b10 kernel/locking/lockdep.c:5090
 lock_acquire kernel/locking/lockdep.c:5753 [inline]
 lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5718
 debug_objects_fill_pool lib/debugobjects.c:614 [inline]
 debug_object_activate+0x144/0x490 lib/debugobjects.c:713
 debug_hrtimer_activate kernel/time/hrtimer.c:422 [inline]
 debug_activate kernel/time/hrtimer.c:477 [inline]
 enqueue_hrtimer+0x23/0x310 kernel/time/hrtimer.c:1087
 __hrtimer_start_range_ns kernel/time/hrtimer.c:1261 [inline]
 hrtimer_start_range_ns+0x7c0/0xdc0 kernel/time/hrtimer.c:1301
 posixtimer_rearm+0x1e8/0x350 kernel/time/posix-timers.c:267
 dequeue_signal+0x2a8/0x660 kernel/signal.c:705
 get_signal+0x5d8/0x2790 kernel/signal.c:2784
 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x121/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
 do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:88
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f5fed87cae7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 <0f> 05 48 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007f5fee63d178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f5fed99bf88 RCX: 00007f5fed87cae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5fed99bf88
RBP: 00007f5fed99bf80 R08: 00007f5fee63d6c0 R09: 00007f5fee63d6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5fed99bf8c
R13: 000000000000000b R14: 00007ffda83a7850 R15: 00007ffda83a7938
 </TASK>