rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4206/1:b..l
	(detected by 1, t=10502 jiffies, g=18089, q=943)
task:syz-executor    state:R  running task     stack:20640 pid: 4206 ppid:     1 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6780
 irqentry_exit+0x53/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
RIP: 0010:PageSwapCache include/linux/page-flags.h:415 [inline]
RIP: 0010:page_index include/linux/mm.h:1666 [inline]
RIP: 0010:thp_contains+0x1f1/0x3c0 include/linux/pagemap.h:452
Code: 07 e8 e3 c2 d7 ff eb 51 4c 89 f7 be 08 00 00 00 e8 54 93 21 00 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 f7 e8 a5 91 21 00 49 8b 1e bd 00 04 00 00 be 00 04 00
RSP: 0018:ffffc90003127738 EFLAGS: 00000246
RAX: 1ffffd40003080c0 RBX: 00fff0000008001f RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0001840600
RBP: 0000000000080000 R08: dffffc0000000000 R09: fffff940003080c1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffea0001840600
R13: ffffea0001840600 R14: ffffea0001840600 R15: ffffea0001840608
 find_lock_entries+0xa6d/0x1030 mm/filemap.c:2106
 shmem_undo_range+0x2a3/0x1b50 mm/shmem.c:943
 shmem_truncate_range mm/shmem.c:1063 [inline]
 shmem_evict_inode+0x21b/0xa00 mm/shmem.c:1145
 evict+0x2a4/0x620 fs/inode.c:587
 __dentry_kill+0x436/0x650 fs/dcache.c:582
 dentry_kill+0xbb/0x290
 dput+0xd8/0x1a0 fs/dcache.c:889
 __fput+0x5ec/0x890 fs/file_table.c:288
 task_work_run+0x129/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff0e850ef07
RSP: 002b:00007ffef32dd378 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007ff0e857b515 RCX: 00007ff0e850ef07
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffef32dd430
RBP: 00007ffef32dd430 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffef32de4f0
R13: 00007ff0e857b515 R14: 0000000000025621 R15: 0000000000024ebd
 </TASK>