INFO: task syz.3.1143:12196 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1143      state:D stack:24704 pid:12196 tgid:12194 ppid:11999  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 sync_bdevs+0x27e/0x470
 __ia32_sys_sync+0xc5/0x120
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5dddb9c799
RSP: 002b:00007f5dde9ab028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f5ddde15fa0 RCX: 00007f5dddb9c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f5ddde15fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5ddde16038 R14: 00007f5ddde15fa0 R15: 00007ffc90b4e0b8
 </TASK>
INFO: task syz.3.1143:12197 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1143      state:D stack:26216 pid:12197 tgid:12194 ppid:11999  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 sync_bdevs+0x27e/0x470
 __ia32_sys_sync+0xc5/0x120
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5dddb9c799
RSP: 002b:00007f5dde98a028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f5ddde16090 RCX: 00007f5dddb9c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f5ddde16090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5ddde16128 R14: 00007f5ddde16090 R15: 00007ffc90b4e0b8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e75e520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by acpid/5240:
 #0: ffff8881a80ff160 (&mousedev->mutex#2){+.+.}-{4:4}, at: mousedev_open_device+0x27/0x150
 #1: ffff8881ba8dd2c0 (&dev->mutex#2){+.+.}-{4:4}, at: input_open_device+0x50/0x3b0
 #2: ffff88819d0a5148 (&dev->pm_mutex){+.+.}-{4:4}, at: bcm5974_open+0x8d/0x180
3 locks held by udevd/5255:
2 locks held by getty/5633:
 #0: ffff888110b2b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
1 lock held by udevd/6277:
 #0: ffff888109e4d358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
2 locks held by udevd/6986:
 #0: ffff8881a80f8118 (&evdev->mutex){+.+.}-{4:4}, at: evdev_open+0x2d4/0x5b0
 #1: ffff8881ba8dd2c0 (&dev->mutex#2){+.+.}-{4:4}, at: input_open_device+0x50/0x3b0
1 lock held by syz.3.1143/12196:
 #0: ffff888109e4d358 (&disk->open_mutex){+.+.}-{4:4}, at: sync_bdevs+0x27e/0x470
1 lock held by syz.3.1143/12197:
 #0: ffff888109e4d358 (&disk->open_mutex){+.+.}-{4:4}, at: sync_bdevs+0x27e/0x470
3 locks held by syz.7.1747/15091:

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

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+0xfd9/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 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: 15091 Comm: syz.7.1747 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:mark_lock+0x3c/0x190
Code: 00 03 00 83 f9 01 bb 09 00 00 00 83 db 00 83 fa 08 0f 45 da bd 01 00 00 00 89 d9 d3 e5 25 ff 1f 00 00 48 0f a3 05 c4 fb 81 12 <73> 10 48 69 c0 c8 00 00 00 48 8d 88 10 d4 c4 93 eb 42 83 3d 8b 8b
RSP: 0018:ffffc90005867430 EFLAGS: 00000007
RAX: 0000000000000621 RBX: 0000000000000006 RCX: 0000000000000006
RDX: 0000000000000006 RSI: ffff888105b8c600 RDI: ffff888105b8ba80
RBP: 0000000000000040 R08: ffffffff90119cb7 R09: 1ffffffff2023396
R10: dffffc0000000000 R11: fffffbfff2023397 R12: ffff888105b8c628
R13: ffff88823fff83a0 R14: ffff888105b8c600 R15: 0000000000000001
FS:  00007f9a3bc4e6c0(0000) GS:ffff8882a9460000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a319ff000 CR3: 00000001aa94e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lockdep_hardirqs_on_prepare+0x178/0x260
 trace_hardirqs_on+0x28/0x40
 seqcount_lockdep_reader_access+0x89/0xc0
 bad_range+0x8b/0x2c0
 get_page_from_freelist+0x24bb/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 alloc_pages_mpol+0x232/0x4a0
 folio_alloc_mpol_noprof+0x39/0x70
 shmem_alloc_and_add_folio+0x445/0xf80
 shmem_get_folio_gfp+0x5a9/0x1670
 shmem_write_begin+0x16c/0x330
 generic_perform_write+0x2e2/0x8f0
 shmem_file_write_iter+0xf8/0x120
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9a3ad5cfce
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f9a3bc4dda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f9a3bc4e6c0 RCX: 00007f9a3ad5cfce
RDX: 0000000001000000 RSI: 00007f9a30a00000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 00007f9a3bc4dee0 R14: 00007f9a3bc4dea0 R15: 00007f9a30a00000
 </TASK>
