INFO: task syz.1.1191:11231 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1191      state:D stack:25368 pid:11231 tgid:11223 ppid:5592   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17db/0x58f0
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x87d/0x1080
 down_write+0x1bc/0x200
 fuse_file_fallocate+0x2d8/0x8a0
 vfs_fallocate+0x65a/0x7e0
 madvise_vma_behavior+0x2fc2/0x4cb0
 madvise_walk_vmas+0x57d/0xb70
 madvise_do_behavior+0x385/0x540
 do_madvise+0x327/0x3a0
 __x64_sys_madvise+0xa6/0xc0
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9f8f99f559
RSP: 002b:00007f9f8dbcd028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f9f8fc26090 RCX: 00007f9f8f99f559
RDX: 0000000000000009 RSI: 0000000000600002 RDI: 0000200000000000
RBP: 00007f9f8fa36b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9f8fc26128 R14: 00007f9f8fc26090 R15: 00007ffed4d8a898
 </TASK>

Showing all locks held in the system:
locks held by khungtaskd/37: 1, last CPU#0:
 #0: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
locks held by getty/5421: 2, on CPU#0:
 #0: ffff8881026f10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000348b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
locks held by kworker/0:6/5653: 4, on CPU#0:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #1: ffffc90004c9fc40 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #2: ffffc90004c9f770 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_atomic_helper_dirtyfb+0x106/0xfd0
 #3: ffffc90004c9f798 (crtc_ww_class_mutex){+.+.}-{4:4}, at: drm_atomic_helper_dirtyfb+0x106/0xfd0
locks held by kworker/u8:3/5666: 3, last CPU#1:
 #0: ffff8881775ee940 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #1: ffffc90004d87c40 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #2: ffff8881aef2b998 (key#19){+...}-{3:3}, at: batadv_tt_purge+0x11b/0xa10
locks held by syz.1.1191/11224: 4, last CPU#0:
 #0: ffff88811098f0f0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320
 #1: ffff888111b42460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #2: ffff8881ba4e6340 (&sb->s_type->i_mutex_key#28){+.+.}-{4:4}, at: fuse_file_write_iter+0xb7f/0x11b0
 #3: ffffffff8fd5c8e0 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0x8f/0x2550
locks held by syz.1.1191/11231: 2, on CPU#0:
 #0: ffff888111b42460 (sb_writers#13){.+.+}-{0:0}, at: vfs_fallocate+0x5e0/0x7e0
 #1: ffff8881ba4e6340 (&sb->s_type->i_mutex_key#28){+.+.}-{4:4}, at: fuse_file_fallocate+0x2d8/0x8a0

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17d/0x390
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 18182 Comm: syz.2.2726 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x80
Code: 89 fb e8 23 00 00 00 48 8b 3d 04 9e ab 0c 48 89 de 5b e9 63 15 66 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d 98 2d ce 12 65 48 8b 15 98 2d
RSP: 0018:ffffc900043472c0 EFLAGS: 00000082
RAX: ffffffff8be71d27 RBX: ffffea0006ddcd80 RCX: ffff88816d79bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffea0006ddcd87 R09: 1ffffd4000dbb9b0
R10: dffffc0000000000 R11: fffff94000dbb9b1 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900043473e0
FS:  000055556c696500(0000) GS:ffff8882a7cbb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001500 CR3: 00000001777e6000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xas_store+0x1c6/0x1860
 __filemap_remove_folio+0x3e8/0x530
 filemap_remove_folio+0xf1/0x3a0
 truncate_inode_folio+0x5d/0x70
 shmem_undo_range+0x454/0x15e0
 shmem_evict_inode+0x240/0xb10
 evict+0x624/0xb50
 dentry_kill+0x1b9/0x880
 finish_dput+0x1a/0x260
 __fput+0x675/0xa50
 task_work_run+0x1d9/0x270
 do_exit+0x73a/0x2360
 do_group_exit+0x22d/0x2f0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x18c6/0x18d0
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f179ff9f559
Code: Unable to access opcode bytes at 0x7f179ff9f52f.
RSP: 002b:00007ffe6af92468 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f179ff9f559
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe6af924cc R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000398
R13: 00000000000927c0 R14: 00000000000500dc R15: 00007ffe6af92520
 </TASK>
