INFO: task syz.1.220:7885 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.220       state:D stack:26752 pid:7885  tgid:7884  ppid:7077   task_flags:0x400140 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f591d78eba9
RSP: 002b:00007f591e5fb038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f591d9d5fa0 RCX: 00007f591d78eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f591d811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f591d9d6038 R14: 00007f591d9d5fa0 R15: 00007fff4c7078c8
 </TASK>
INFO: task syz.1.220:7894 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.220       state:D stack:28328 pid:7894  tgid:7884  ppid:7077   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 super_lock+0x2a9/0x3b0
 __iterate_supers+0x126/0x290
 __se_sys_quotactl+0x353/0x950
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f591d78eba9
RSP: 002b:00007f591e5da038 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f591d9d6090 RCX: 00007f591d78eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f591d811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f591d9d6128 R14: 00007f591d9d6090 R15: 00007fff4c7078c8
 </TASK>

Showing all locks held in the system:
2 locks held by pool_workqueue_/3:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13a0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5676:
 #0: ffff8880278d40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029032f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz-executor/5856:
1 lock held by syz.1.220/7885:
 #0: ffff8881202ec0e0 (&type->s_umount_key#69){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.1.220/7894:
 #0: ffff8881202ec0e0 (&type->s_umount_key#69){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.0.298/8504:
 #0: ffff8881202ec0e0 (&type->s_umount_key#69){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
2 locks held by syz-executor/10260:
 #0: ffffffff8e88ef08 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x44a/0x690
 #1: ffffffff8e13fa40 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570
2 locks held by dhcpcd-run-hook/10750:

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

NMI backtrace for cpu 0
CPU: 0 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+0x439/0x7d0
 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: 10751 Comm: dhcpcd-run-hook 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_const_cmp1+0x83/0x90
Code: 8d 52 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 01 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 <c3> cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0000:ffffc90002a0f980 EFLAGS: 00000293
RAX: ffffffff81f6b4ca RBX: ffffffff81f6b3bc RCX: 0000000000000000
RDX: ffff88810a393980 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000001 R08: ffffea00002dfef7 R09: 1ffffd400005bfde
R10: dffffc0000000000 R11: fffff9400005bfdf R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffea00002dfef4 R15: 0000000000000006
FS:  00007fb94a225380(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb94a472860 CR3: 0000000129b8a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 folio_try_get+0x12a/0x340
 next_uptodate_folio+0xcb/0x5d0
 filemap_map_pages+0x21d/0x1740
 __handle_mm_fault+0x34ac/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7fb94a472860
Code: Unable to access opcode bytes at 0x7fb94a472836.
RSP: 002b:00007fff2daafc38 EFLAGS: 00010202
RAX: 0000000000000002 RBX: 00007fb94a5253d8 RCX: 00007fb94a560098
RDX: 000055d331c4c910 RSI: 000055d331c5a280 RDI: 000000000000000b
RBP: 000055d331c4e850 R08: 0000000000000000 R09: 0000000000000001
R10: 00007fb94a560088 R11: 0000000000000246 R12: 000055d331c4c910
R13: 000055d331c54fd0 R14: 0000000000000000 R15: 0000000000000124
 </TASK>
