rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P12937/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=79097, q=705 ncpus=2)
task:syz-executor.2  state:R  running task     stack:20400 pid:12937 tgid:12936 ppid:12381  flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 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:__nr_to_section include/linux/mmzone.h:1861 [inline]
RIP: 0010:__pfn_to_section include/linux/mmzone.h:1969 [inline]
RIP: 0010:lookup_page_ext mm/page_ext.c:250 [inline]
RIP: 0010:page_ext_get+0x107/0x2a0 mm/page_ext.c:522
Code: ff ff ff 00 00 00 48 89 ef 48 89 de e8 02 21 8e ff 48 39 eb 0f 87 91 01 00 00 48 c7 c0 a0 0e 82 94 48 c1 e8 03 42 80 3c 38 00 <74> 0c 48 c7 c7 a0 0e 82 94 e8 0b 2b f4 ff 48 8b 05 94 c7 79 12 48
RSP: 0018:ffffc9000a0171d0 EFLAGS: 00000246
RAX: 1ffffffff29041d4 RBX: 0000000001028ac0 RCX: ffff888020998000
RDX: ffffc9000d702000 RSI: 0000000001028ac0 RDI: 000000ffffffffc0
RBP: 000000ffffffffc0 R08: ffffffff820846de R09: 1ffffffff25f92d8
R10: dffffc0000000000 R11: fffffbfff25f92d9 R12: 0000000000040a2b
R13: 0000000000000001 R14: ffffffff82084610 R15: dffffc0000000000
 __set_page_owner+0x9e/0x800 mm/page_owner.c:322
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1470
 prep_new_page mm/page_alloc.c:1478 [inline]
 get_page_from_freelist+0x2cbd/0x2d70 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4715
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
 folio_alloc_mpol_noprof+0x36/0x50 mm/mempolicy.c:2281
 shmem_alloc_folio mm/shmem.c:1723 [inline]
 shmem_alloc_and_add_folio+0x2ce/0x14e0 mm/shmem.c:1783
 shmem_get_folio_gfp+0xa22/0x2660 mm/shmem.c:2189
 shmem_get_folio mm/shmem.c:2294 [inline]
 shmem_write_begin+0x170/0x4d0 mm/shmem.c:2899
 generic_perform_write+0x322/0x640 mm/filemap.c:4016
 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:3075
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd06547bcaf
RSP: 002b:00007fd06623ae80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000100000 RCX: 00007fd06547bcaf
RDX: 0000000000100000 RSI: 00007fd05b200000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000ab5
R10: 00000000000007c2 R11: 0000000000000293 R12: 0000000000000003
R13: 00007fd06623af80 R14: 00007fd06623af40 R15: 00007fd05b200000
 </TASK>
rcu: rcu_preempt kthread starved for 10539 jiffies! g79097 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:26448 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5192 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2029
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2231
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 12938 Comm: syz-executor.1 Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5066
Code: c9 50 e8 09 b6 0b 00 48 83 c4 08 4c 89 f7 e8 7d 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 c0 14 32 0a e8 8b 2f 37 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000a83f808 EFLAGS: 00000286
RAX: 0c17dfef1816b400 RBX: ffff88802099da00 RCX: ffffffff947c1803
RDX: dffffc0000000000 RSI: ffffffff8bcac1e0 RDI: ffffffff8c200e00
RBP: ffffc9000a83f850 R08: ffffffff8fae026f R09: 1ffffffff1f5c04d
R10: dffffc0000000000 R11: fffffbfff1f5c04e R12: 1ffff11017287ec7
R13: dffffc0000000000 R14: ffff8880b943e8c0 R15: ffff8880b943f638
FS:  000055557a969480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb005c0bf80 CR3: 0000000068ee6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 context_switch kernel/sched/core.c:5195 [inline]
 __schedule+0x17f0/0x4a20 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:preempt_count_add+0x0/0x190 kernel/sched/core.c:5644
Code: c1 03 38 c1 7c 97 48 8b 3c 24 e8 bb e5 96 00 eb 8c e9 ee fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 41 57 41 56 53 89 fb 48 c7 c0 20 18 7c 94 48 c1 e8 03
RSP: 0018:ffffc9000a83fbe0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 1ffff11004133b40 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcac1e0 RDI: 0000000000000001
RBP: ffff88802099da00 R08: ffffffff8fae026f R09: 1ffffffff1f5c04d
R10: dffffc0000000000 R11: fffffbfff1f5c04e R12: dffffc0000000000
R13: ffffc9000a83fda0 R14: ffffffff8b971ed0 R15: ffff88802099ec78
 __schedule_loop kernel/sched/core.c:6605 [inline]
 schedule+0x144/0x320 kernel/sched/core.c:6621
 do_nanosleep+0x197/0x600 kernel/time/hrtimer.c:2028
 hrtimer_nanosleep+0x227/0x470 kernel/time/hrtimer.c:2081
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline]
 __se_sys_clock_nanosleep+0x32b/0x3c0 kernel/time/posix-timers.c:1373
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f55a94a8375
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffc5b748d10 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007f55a95b3f80 RCX: 00007f55a94a8375
RDX: 00007ffc5b748d50 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f55a95b5980 R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000009012d
R13: 00007f55a95b412c R14: 0000000000000032 R15: 00007f55a95b5980
 </TASK>