rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4277/1:b..l P4267/1:b..l
(detected by 1, t=10502 jiffies, g=9801, q=322 ncpus=2)
task:syz-executor state:R running task stack:22064 pid:4267 ppid:4263 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:xas_find+0x4c5/0xab0 lib/xarray.c:1262
Code: 89 44 24 30 48 8b 44 24 18 80 3c 18 00 74 08 4c 89 f7 e8 3e f9 b3 f7 4d 8b 36 4c 89 f7 4c 8b 7c 24 38 4c 89 fe e8 1b 10 63 f7 <4d> 39 fe 0f 87 9d 04 00 00 41 0f b6 04 1c 84 c0 0f 85 66 03 00 00
RSP: 0018:ffffc90003cc7768 EFLAGS: 00000293
RAX: ffffffff8a1f6435 RBX: dffffc0000000000 RCX: ffff8880277b3b80
RDX: 0000000000000000 RSI: fffffffffffffffe RDI: 0000000000000542
RBP: ffff8880546ce100 R08: ffff8880277b3b80 R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000000000 R12: 1ffff92000798f0e
R13: ffffc90003cc7872 R14: 0000000000000542 R15: fffffffffffffffe
find_get_entry mm/filemap.c:2031 [inline]
find_lock_entries+0x1c8/0xbb0 mm/filemap.c:2123
shmem_undo_range+0x288/0x20c0 mm/shmem.c:925
shmem_truncate_range mm/shmem.c:1062 [inline]
shmem_evict_inode+0x25b/0xa80 mm/shmem.c:1171
evict+0x4c9/0x8d0 fs/inode.c:705
do_unlinkat+0x388/0x580 fs/namei.c:4405
__do_sys_unlink fs/namei.c:4446 [inline]
__se_sys_unlink fs/namei.c:4444 [inline]
__x64_sys_unlink+0x45/0x50 fs/namei.c:4444
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7feed5799fa7
RSP: 002b:00007fff847d1888 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007feed5799fa7
RDX: 00007fff847d18b0 RSI: 00007fff847d1940 RDI: 00007fff847d1940
RBP: 00007fff847d1940 R08: 00007fff847d2940 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fff847d29d0
R13: 00007feed580471f R14: 0000000000017c42 R15: 00007fff847d2a10
task:syz-executor state:R running task stack:21968 pid:4277 ppid:4266 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6731
preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6755
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
unwind_next_frame+0x1892/0x20b0 arch/x86/kernel/unwind_orc.c:629
arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
save_stack+0x121/0x230 mm/page_owner.c:127
__reset_page_owner+0x51/0x1a0 mm/page_owner.c:148
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1459 [inline]
free_pcp_prepare mm/page_alloc.c:1509 [inline]
free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384
free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3525
release_pages+0x1fa6/0x2220 mm/swap.c:1035
__pagevec_release+0x6d/0xe0 mm/swap.c:1055
pagevec_release include/linux/pagevec.h:71 [inline]
folio_batch_release include/linux/pagevec.h:135 [inline]
shmem_undo_range+0x7c2/0x20c0 mm/shmem.c:946
shmem_truncate_range mm/shmem.c:1062 [inline]
shmem_evict_inode+0x25b/0xa80 mm/shmem.c:1171
evict+0x4c9/0x8d0 fs/inode.c:705
do_unlinkat+0x388/0x580 fs/namei.c:4405
__do_sys_unlink fs/namei.c:4446 [inline]
__se_sys_unlink fs/namei.c:4444 [inline]
__x64_sys_unlink+0x45/0x50 fs/namei.c:4444
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f22cb999fa7
RSP: 002b:00007ffdd9d47128 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f22cb999fa7
RDX: 00007ffdd9d47150 RSI: 00007ffdd9d471e0 RDI: 00007ffdd9d471e0
RBP: 00007ffdd9d471e0 R08: 00007ffdd9d481e0 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffdd9d48270
R13: 00007f22cba0471f R14: 0000000000017a27 R15: 00007ffdd9d482b0
rcu: rcu_preempt kthread starved for 10577 jiffies! g9801 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:27608 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:__timer_delete_sync+0x0/0x2e0 kernel/time/timer.c:1545
Code: c6 81 61 00 e9 2e ff ff ff 90 53 48 89 fb e8 a7 96 10 00 48 89 df 31 f6 5b eb 0f 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00
RSP: 0018:ffffc90000157bb8 EFLAGS: 00010246
RAX: 0000000000208040 RBX: 00000000ffffb111 RCX: ffffffff8a34f020
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000157be0
RBP: ffffc90000157cb0 R08: ffff88813fea5947 R09: 1ffff11027fd4b28
R10: dffffc0000000000 R11: ffffed1027fd4b29 R12: 1ffff9200002af78
R13: ffffc90000157be0 R14: 1ffffffff1901e40 R15: dffffc0000000000
timer_delete_sync kernel/time/timer.c:1629 [inline]
del_timer_sync include/linux/timer.h:200 [inline]
schedule_timeout+0x18e/0x2d0 kernel/time/timer.c:2169
rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:741
sched: RT throttling activated