rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7485/1:b..l P7442/1:b..l
rcu: 	(detected by 0, t=10506 jiffies, g=140277, q=1608 ncpus=2)
task:syz.0.9253      state:R  running task     stack:25032 pid:7442  tgid:7438  ppid:5251   task_flags:0x40054c flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d4/0x5630 kernel/sched/core.c:7239
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7561
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x910 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x222/0x350 kernel/locking/lockdep.c:5890
Code: ff ff ff e8 00 24 36 0a f7 44 24 08 00 02 00 00 0f 84 39 ff ff ff 65 48 8b 05 52 4f cd 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 27 25 b9
RSP: 0018:ffffc900060b74e0 EFLAGS: 00000282
RAX: f9dbc539575e4500 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000005a44979c RSI: ffffffff8e4dd2a6 RDI: ffffffff8c4cd780
RBP: ffffffff8177710f R08: ffffffff8177710f R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb5a1e0 R12: 0000000000000002
R13: ffffffff8eb5a1e0 R14: 0000000000000000 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 rcu_read_lock include/linux/rcupdate.h:840 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1183 [inline]
 unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 save_stack+0x122/0x230 mm/page_owner.c:165
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1406 [inline]
 free_pages_prepare+0x960/0xa60 mm/page_alloc.c:1451
 __free_contig_range_common+0x174/0x340 mm/page_alloc.c:6897
 __free_contig_range mm/page_alloc.c:6942 [inline]
 free_pages_bulk+0x48/0x120 mm/page_alloc.c:5257
 vm_area_free_pages mm/vmalloc.c:3461 [inline]
 vfree+0x226/0x4a0 mm/vmalloc.c:3510
 kcov_put kernel/kcov.c:449 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:554
 __fput+0x418/0xa50 fs/file_table.c:512
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x73a/0x2360 kernel/exit.c:1009
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1152
 get_signal+0x121b/0x12c0 kernel/signal.c:3046
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f69fdb9e0d9
RSP: 002b:00007f69fe9b0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 0000000000000001 RBX: 00007f69fde25fa0 RCX: 00007f69fdb9e0d9
RDX: 040000000000009f RSI: 00002000000002c0 RDI: 0000000000000004
RBP: 00007f69fdc35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f69fde26038 R14: 00007f69fde25fa0 R15: 00007fff015c5108
 </TASK>
task:modprobe        state:R  running task     stack:24688 pid:7485  tgid:7485  ppid:24725  task_flags:0x400000 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d4/0x5630 kernel/sched/core.c:7239
 preempt_schedule_notrace+0x56/0x90 kernel/sched/core.c:7511
 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13
 rcu_lockdep_current_cpu_online+0x10a/0x120 kernel/rcu/tree.c:4079
 rcu_read_lock_held_common kernel/rcu/update.c:113 [inline]
 rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349
 xa_head include/linux/xarray.h:1210 [inline]
 xas_start+0x295/0x770 lib/xarray.c:191
 xas_load+0x2c/0x5a0 lib/xarray.c:239
 filemap_get_read_batch+0x192/0xa00 mm/filemap.c:2477
 filemap_get_pages+0x33d/0x1ec0 mm/filemap.c:2700
 filemap_read+0x426/0x11e0 mm/filemap.c:2820
 ext4_file_read_iter+0x553/0xad0 fs/ext4/file.c:-1
 new_sync_read fs/read_write.c:493 [inline]
 vfs_read+0x595/0xa80 fs/read_write.c:574
 ksys_pread64 fs/read_write.c:764 [inline]
 __do_sys_pread64 fs/read_write.c:772 [inline]
 __se_sys_pread64 fs/read_write.c:769 [inline]
 __x64_sys_pread64+0x196/0x220 fs/read_write.c:769
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0d9dfd510a
RSP: 002b:00007ffe4eec1e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000011
RAX: ffffffffffffffda RBX: 00007ffe4eec21e0 RCX: 00007f0d9dfd510a
RDX: 0000000000000310 RSI: 00007ffe4eec1e50 RDI: 0000000000000000
RBP: 00007ffe4eec21d0 R08: 00007ffe4eec23d7 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000310 R14: 00007ffe4eec23f0 R15: 00007ffe4eec23f8
 </TASK>