INFO: task syz.4.9960:12860 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.9960      state:D stack:23864 pid:12860 tgid:12859 ppid:8216   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 io_schedule+0x7f/0xd0
 folio_wait_bit_common+0x6d8/0xbc0
 migrate_pages_batch+0x17e5/0x4ca0
 migrate_pages+0x20e0/0x2a10
 compact_zone+0x221b/0x4660
 sysctl_compaction_handler+0x3f3/0x870
 proc_sys_call_handler+0x4c8/0x830
 iter_file_splice_write+0x9a1/0x10f0
 direct_splice_actor+0x101/0x160
 splice_direct_to_actor+0x53a/0xc70
 do_splice_direct+0x195/0x290
 do_sendfile+0x535/0x7d0
 __se_sys_sendfile64+0xdf/0x1a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2e26b9ce59
RSP: 002b:00007f2e27a7a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f2e26e15fa0 RCX: 00007f2e26b9ce59
RDX: 00002000000000c0 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f2e26c32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2e26e16038 R14: 00007f2e26e15fa0 R15: 00007ffc91065ab8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5440:
 #0: ffff88816efa30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
1 lock held by udevd/9287:
 #0: ffff88810b292350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
1 lock held by syz.4.9960/12860:
 #0: ffff8881b1688410 (sb_writers#3){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160
1 lock held by syz.5.10149/13529:
 #0: ffff88810b292350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
1 lock held by syz.0.10728/15795:
 #0: ffff88811a5dd040 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x389/0x470
 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: 13900 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:check_preemption_disabled+0x1c/0xe0
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 65 8b 05 87 bf 8f 07 65 8b 0d 7c bf 8f 07 f7 c1 ff ff ff 7f 74 0c <5b> 41 5e 41 5f 5d e9 19 da 02 00 cc 9c 59 f7 c1 00 02 00 00 74 ea
RSP: 0018:ffffc900219df768 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000202 RCX: 0000000000000046
RDX: ffffc900219df901 RSI: ffffffff8dfc9d79 RDI: ffffffff8c28cb60
RBP: dffffc0000000000 R08: ffffc900219dfcd0 R09: 0000000000000000
R10: ffffc900219df918 R11: fffff5200433bf25 R12: ffffc900219dfce0
R13: ffffffff8176f256 R14: ffffffff8e95cce0 R15: ffff888113233b00
FS:  000055558246d500(0000) GS:ffff8882a9284000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f400afe8158 CR3: 000000001f704000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_release+0xa1/0x3c0
 unwind_next_frame+0x1bba/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x35c/0x760
 security_sk_alloc+0x52/0x360
 sk_prot_alloc+0x101/0x210
 sk_alloc+0x3a/0x390
 inet_create+0x7a0/0x1000
 __sock_create+0x4b2/0x9d0
 __sys_socket+0xd6/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f400ad9e6c7
Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 29 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcb29a2518 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f400ad9e6c7
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 00007ffcb29a2c1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000009b
R13: 00000000000927c0 R14: 00000000001fceed R15: 00007ffcb29a2c70
 </TASK>
