INFO: task syz.8.5485:21310 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.8.5485      state:D stack:26344 pid:21310 tgid:21301 ppid:17981  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 usbdev_open+0x182/0x770
 chrdev_open+0x4cd/0x5e0
 do_dentry_open+0x785/0x14e0
 vfs_open+0x3b/0x340
 path_openat+0x2e08/0x3860
 do_file_open+0x23e/0x4a0
 do_sys_openat2+0x113/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fac6315d68e
RSP: 002b:00007fac640e0b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fac640e16c0 RCX: 00007fac6315d68e
RDX: 0000000000000082 RSI: 00007fac640e0c00 RDI: ffffffffffffff9c
RBP: 00007fac640e0c00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007fac63416218 R14: 00007fac63416180 R15: 00007fff0f675f08
 </TASK>

Showing all locks held in the system:
6 locks held by kworker/1:1/32:
1 lock held by khungtaskd/34:
 #0: ffffffff8e75e5e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5635:
 #0: ffff888179b360a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
4 locks held by udevd/5811:
 #0: ffff8880221ee9e0 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xb7/0xe10
 #1: ffff88801faf4088 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x5c/0x420
 #2: ffff888195ef3f08 (kn->active#26){++++}-{0:0}, at: kernfs_seq_start+0xb2/0x420
 #3: ffff88816e2961e0 (&dev->mutex){....}-{4:4}, at: manufacturer_show+0x26/0xa0
1 lock held by syz.8.5485/21310:
 #0: ffff88816e9551e0 (&dev->mutex){....}-{4:4}, at: usbdev_open+0x182/0x770
1 lock held by syz-executor/25017:

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

NMI backtrace for cpu 1
CPU: 1 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 25965 Comm: syz.4.7345 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:unwind_next_frame+0x714/0x23c0
Code: 24 40 0f b6 04 28 84 c0 48 89 54 24 08 48 89 34 24 0f 85 3d 16 00 00 4c 89 e0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 53 16 00 00 <0f> b7 1e c1 eb 0b 80 e3 01 48 8b 44 24 28 0f b6 04 28 84 c0 4c 8b
RSP: 0018:ffffc90003ea6f98 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff90290cc8 RCX: ffffffff90290ccc
RDX: ffffffff90a4ad76 RSI: ffffffff90a4ad7a RDI: ffffffff8c27c4a0
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8e75e5e0
R10: ffffc90003ea70b8 R11: ffffffff81b0c390 R12: ffffffff90a4ad7b
R13: ffffc90003ea70b8 R14: ffffc90003ea7068 R15: ffffffff81767e95
FS:  000055557f61b500(0000) GS:ffff88818de5d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1968c87e20 CR3: 000000000e54c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __reset_page_owner+0x71/0x1f0
 free_unref_folios+0xed5/0x16d0
 folios_put_refs+0x789/0x8d0
 free_pages_and_swap_cache+0x2e7/0x5b0
 tlb_flush_mmu+0x6d3/0xa30
 tlb_finish_mmu+0xf9/0x230
 exit_mmap+0x498/0xa10
 __mmput+0x118/0x430
 exit_mm+0x168/0x220
 do_exit+0x6a2/0x23c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa61b15d68e
Code: Unable to access opcode bytes at 0x7fa61b15d664.
RSP: 002b:00007ffe4f518568 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 000055557f61b500 RCX: 00007fa61b15d68e
RDX: 00007ffe4f5185c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe4f518710
R13: 00007fa61b415fac R14: 00000000000bd38e R15: 00007fa61b415fa0
 </TASK>
