INFO: task syz.9.2505:19567 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.2505      state:D stack:17448 pid:19567 tgid:19566 ppid:19263  task_flags:0x440140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 __bch2_two_state_lock+0x1ea/0x370
 bch2_readahead+0x94f/0x1100
 read_pages+0x17a/0x580
 page_cache_ra_order+0x8ca/0xd40
 filemap_get_pages+0x43c/0x1ea0
 filemap_splice_read+0x581/0xc60
 splice_direct_to_actor+0x4a9/0xcc0
 do_splice_direct+0x181/0x270
 do_sendfile+0x4da/0x7e0
 __se_sys_sendfile64+0xd9/0x190
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f371838ebe9
RSP: 002b:00007f3719135038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f37185c5fa0 RCX: 00007f371838ebe9
RDX: 0000200000000080 RSI: 0000000000000005 RDI: 0000000000000005
RBP: 00007f3718411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000007f03 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f37185c6038 R14: 00007f37185c5fa0 R15: 00007ffe218af6e8
 </TASK>
INFO: task syz.9.2505:19583 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.2505      state:D stack:20328 pid:19583 tgid:19566 ppid:19263  task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 io_schedule+0x80/0xd0
 folio_wait_bit_common+0x6b0/0xb90
 __filemap_get_folio+0x139/0xaf0
 bch2_seek_pagecache_hole+0xbb/0x7c0
 bch2_clamp_data_hole+0x8f/0x180
 __bchfs_fallocate+0xe77/0x1870
 bchfs_fallocate+0x33f/0x680
 bch2_fallocate_dispatch+0x28a/0x410
 vfs_fallocate+0x669/0x7e0
 __x64_sys_fallocate+0xc0/0x110
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f371838ebe9
RSP: 002b:00007f37165f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f37185c6090 RCX: 00007f371838ebe9
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 00007f3718411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000080005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f37185c6128 R14: 00007f37185c6090 R15: 00007ffe218af6e8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5676:
 #0: ffff8881101d10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by syz.9.2505/19567:
 #0: ffff888112ae4740 (mapping.invalidate_lock#4){.+.+}-{4:4}, at: page_cache_ra_order+0x318/0xd40
3 locks held by syz.9.2505/19583:
 #0: ffff88811021c428 (sb_writers#15){.+.+}-{0:0}, at: vfs_fallocate+0x5f0/0x7e0
 #1: ffff888112ae45a0 (&sb->s_type->i_mutex_key#21){++++}-{4:4}, at: bch2_fallocate_dispatch+0x10e/0x410
 #2: ffff888119584398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7f4/0xd80

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 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:pv_native_safe_halt+0x13/0x20
Code: 53 e7 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d f3 86 0e 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8de07d80 EFLAGS: 00000282
RAX: ac20acd926ab5300 RBX: ffffffff819683c8 RCX: ac20acd926ab5300
RDX: 0000000000000001 RSI: ffffffff8d9b77f8 RDI: ffffffff8be33680
RBP: ffffffff8de07eb8 R08: ffff88804b032f9b R09: 1ffff110096065f3
R10: dffffc0000000000 R11: ffffed10096065f4 R12: ffffffff8fa38b30
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1bd2a20
FS:  0000000000000000(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3a06f24ff0 CR3: 0000000026776000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 default_idle+0x13/0x20
 default_idle_call+0x74/0xb0
 do_idle+0x1e8/0x510
 cpu_startup_entry+0x44/0x60
 rest_init+0x2de/0x300
 start_kernel+0x3a9/0x410
 x86_64_start_reservations+0x24/0x30
 x86_64_start_kernel+0x143/0x1c0
 common_startup_64+0x13e/0x147
 </TASK>
