rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P26476/1:b..l P26538/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=229101, q=260 ncpus=2)
task:syz.2.5642 state:R running task stack:23888 pid:26538 tgid:26534 ppid:20161 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 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:lock_is_held_type+0x13b/0x190
Code: 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 42 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90003a06ed8 EFLAGS: 00000206
RAX: ed10b091a0bc8a00 RBX: 0000000000000000 RCX: 0000000080000000
RDX: dffffc0000000000 RSI: ffffffff8c0ae6e0 RDI: ffffffff8c608d00
RBP: 0000000000000002 R08: ffffffff941e4847 R09: 1ffffffff283c908
R10: dffffc0000000000 R11: fffffbfff283c909 R12: 0000000000000246
R13: ffff88802fa1bc00 R14: 00000000ffffffff R15: ffffffff8e9382a0
lock_is_held include/linux/lockdep.h:249 [inline]
rcu_read_lock_sched_held+0x8d/0x130 kernel/rcu/update.c:126
task_css include/linux/cgroup.h:433 [inline]
mem_cgroup_from_task+0x4d/0x120 mm/memcontrol.c:890
get_mem_cgroup_from_mm+0xd7/0x2a0 mm/memcontrol.c:943
__mem_cgroup_charge+0x16/0x80 mm/memcontrol.c:4453
mem_cgroup_charge include/linux/memcontrol.h:672 [inline]
shmem_alloc_and_add_folio+0x88f/0x14f0 mm/shmem.c:1792
shmem_get_folio_gfp+0x8dc/0x2370 mm/shmem.c:2188
shmem_fault+0x252/0x6f0 mm/shmem.c:2388
__do_fault+0x137/0x460 mm/memory.c:4655
do_read_fault mm/memory.c:5061 [inline]
do_fault mm/memory.c:5191 [inline]
do_pte_missing mm/memory.c:3947 [inline]
handle_pte_fault+0x321f/0x6fc0 mm/memory.c:5521
__handle_mm_fault mm/memory.c:5664 [inline]
handle_mm_fault+0x1109/0x1bc0 mm/memory.c:5832
faultin_page mm/gup.c:1194 [inline]
__get_user_pages+0x6ec/0x16a0 mm/gup.c:1493
populate_vma_page_range+0x264/0x330 mm/gup.c:1932
__mm_populate+0x27a/0x460 mm/gup.c:2035
mm_populate include/linux/mm.h:3426 [inline]
do_shmat+0xa63/0xc80 ipc/shm.c:1665
__do_sys_shmat ipc/shm.c:1693 [inline]
__se_sys_shmat ipc/shm.c:1688 [inline]
__x64_sys_shmat+0x106/0x190 ipc/shm.c:1688
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: 0033:0x7f2faf579eb9
RSP: 002b:00007f2faefff038 EFLAGS: 00000246 ORIG_RAX: 000000000000001e
RAX: ffffffffffffffda RBX: 00007f2faf716058 RCX: 00007f2faf579eb9
RDX: 0000000000006000 RSI: 000000002029f000 RDI: 0000000000000000
RBP: 00007f2faf5e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2faf716058 R15: 00007ffdeb5f5838
task:syz.0.5621 state:R running task stack:23360 pid:26476 tgid:26475 ppid:21202 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 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_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:209
Code: 89 fb e8 23 00 00 00 48 8b 3d dc 76 96 0c 48 89 de 5b e9 83 9d 5b 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 00 d7 03 00 65 8b 15 c0 4a
RSP: 0018:ffffc9000d13f068 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 000000000000027c RCX: ffff8880242d9e00
RDX: ffff8880242d9e00 RSI: 000000000000003c RDI: 000000000000003c
RBP: 000000000000003c R08: ffffffff8bb52428 R09: ffffffff8bb5232b
R10: 0000000000000002 R11: ffff8880242d9e00 R12: 1ffff92001a27e37
R13: ffffc9000d13f1b8 R14: 000000000000003c R15: 1ffff92001a27e36
xas_find+0x202/0x960 lib/xarray.c:1269
find_get_entry mm/filemap.c:1990 [inline]
find_lock_entries+0x298/0x10f0 mm/filemap.c:2091
shmem_undo_range+0x2d6/0x1df0 mm/shmem.c:1005
shmem_truncate_range mm/shmem.c:1132 [inline]
shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1260
evict+0x534/0x950 fs/inode.c:704
__dentry_kill+0x20d/0x630 fs/dcache.c:615
dput+0x19f/0x2b0 fs/dcache.c:857
__fput+0x5f8/0x8a0 fs/file_table.c:430
task_work_run+0x251/0x310 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xa2f/0x27f0 kernel/exit.c:882
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
get_signal+0x16a1/0x1740 kernel/signal.c:2917
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f85fef79eb9
RSP: 002b:00007f85ffdbd038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f85ff115f80 RCX: 00007f85fef79eb9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000005
RBP: 00007f85fefe793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f85ff115f80 R15: 00007ffce6aaff98
rcu: rcu_preempt kthread starved for 10384 jiffies! g229101 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:25400 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 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:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
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:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111