rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P26888/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=468905, q=26 ncpus=2)
task:syz-executor.5  state:R  running task     stack:20720 pid:26888 tgid:26888 ppid:5104   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7047
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:348
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:PagePoisoned include/linux/page-flags.h:298 [inline]
RIP: 0010:page_to_nid include/linux/mm.h:1649 [inline]
RIP: 0010:page_zone include/linux/mm.h:1864 [inline]
RIP: 0010:folio_zone include/linux/mm.h:1874 [inline]
RIP: 0010:zone_stat_mod_folio include/linux/vmstat.h:439 [inline]
RIP: 0010:folio_clear_dirty_for_io+0x661/0xd10 mm/page-writeback.c:2910
Code: 8b 3b 48 83 c7 08 e8 3e 0a a7 09 e9 08 fd ff ff e8 04 9b c8 ff e8 6f 4c 9c 09 4d 85 e4 74 b1 e8 f5 9a c8 ff fb 4c 8b 64 24 18 <48> b8 00 00 00 00 00 fc ff df 48 8b 4c 24 28 80 3c 01 00 74 08 4c
RSP: 0018:ffffc900151ceec0 EFLAGS: 00000293
RAX: ffffffff81cad25b RBX: 0000000000000000 RCX: ffff88808b558000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900151cefc8 R08: ffffffff81cad1f8 R09: 1ffffffff2591a98
R10: dffffc0000000000 R11: fffffbfff2591a99 R12: ffffffffffffffff
R13: ffffea0000d33480 R14: 0000000000000001 R15: 0000000000000046
 mpage_submit_folio+0x80/0x210 fs/ext4/inode.c:1850
 mpage_map_and_submit_buffers fs/ext4/inode.c:2115 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2254 [inline]
 ext4_do_writepages+0x1d72/0x3ca0 fs/ext4/inode.c:2679
 ext4_writepages+0x203/0x3e0 fs/ext4/inode.c:2768
 do_writepages+0x3ac/0x680 mm/page-writeback.c:2553
 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:388
 __filemap_fdatawrite_range mm/filemap.c:421 [inline]
 __filemap_fdatawrite mm/filemap.c:427 [inline]
 filemap_flush+0x11e/0x180 mm/filemap.c:454
 ext4_release_file+0x81/0x300 fs/ext4/file.c:169
 __fput+0x42b/0x8a0 fs/file_table.c:376
 task_work_run+0x250/0x310 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa2c/0x2740 kernel/exit.c:871
 do_group_exit+0x206/0x2c0 kernel/exit.c:1020
 get_signal+0x176d/0x1850 kernel/signal.c:2893
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 irqentry_exit_to_user_mode+0x78/0x270 kernel/entry/common.c:225
 exc_general_protection+0x40d/0x5c0 arch/x86/kernel/traps.c:643
 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f91f4e7ddb1
RSP: 002b:0000000020000390 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f91f4fabf80 RCX: 00007f91f4e7dda9
RDX: 00000000200003c0 RSI: 0000000020000390 RDI: 0000000000406000
RBP: 00007f91f4eca47a R08: 0000000020000440 R09: 0000000020000440
R10: 0000000020000400 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f91f4fabf80 R15: 00007ffd34477528
 </TASK>
rcu: rcu_preempt kthread starved for 10553 jiffies! g468905 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:25040 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2183
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
 kthread+0x2f1/0x390 kernel/kthread.c:388
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.8.0-rc6-syzkaller-00278-g58c806d867bf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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:72 [inline]
RIP: 0010:acpi_safe_halt+0x20/0x30 drivers/acpi/processor_idle.c:113
Code: 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 08 6a 9c 74 48 f7 00 08 00 00 00 75 10 eb 07 0f 00 2d 36 b5 a0 00 f3 0f 1e fa fb f4 <fa> e9 8a cc 0a 00 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffffff8de07ca8 EFLAGS: 00000246
RAX: ffffffff8de94680 RBX: ffff88801aaca064 RCX: 00000000007b50e9
RDX: 0000000000000001 RSI: ffff88801aaca000 RDI: ffff88801aaca064
RBP: 0000000000038f98 R08: ffff8880b9436d8b R09: 1ffff11017286db1
R10: dffffc0000000000 R11: ffffffff8b6750c0 R12: ffff888014de5800
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8e898480
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200bd038 CR3: 000000001f7f8000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707
 cpuidle_enter_state+0x11a/0x490 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
 call_cpuidle kernel/sched/idle.c:134 [inline]
 cpuidle_idle_call kernel/sched/idle.c:215 [inline]
 do_idle+0x374/0x5d0 kernel/sched/idle.c:312
 cpu_startup_entry+0x41/0x60 kernel/sched/idle.c:410
 rest_init+0x2e0/0x300 init/main.c:730
 arch_call_rest_init+0xe/0x10 init/main.c:827
 start_kernel+0x474/0x500 init/main.c:1072
 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:536
 secondary_startup_64_no_verify+0x171/0x17b
 </TASK>