INFO: task syz.1.1315:15920 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1315      state:D stack:24856 pid:15920 tgid:15919 ppid:15156  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x516/0x990
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f587f79acb9
RSP: 002b:00007f5880732028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f587fa15fa0 RCX: 00007f587f79acb9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: ffffffff80000901
RBP: 00007f587f808bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f587fa16038 R14: 00007f587fa15fa0 R15: 00007ffd2623bfd8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: 
ffffffff8e35a360
 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5637:
 #0: ffff8881128cf0a0 (&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
2 locks held by syz-executor/10953:
1 lock held by syz.1.1315/15920:
 #0: ffff8881043500e0 (&type->s_umount_key#56){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
1 lock held by syz-executor/17997:
 #0: ffffffff8e360c78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
1 lock held by dhcpcd/19254:
 #0: ffff8881b441c260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcd0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 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: 26 Comm: kworker/u9:0 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
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:__zone_watermark_ok+0x1f1/0x400
Code: 00 48 89 f8 48 c1 e8 03 80 3c 08 00 74 13 e8 16 06 0e 00 48 b9 00 00 00 00 00 fc ff df 48 8b 14 24 4b 8d 2c 2c 48 83 7d 60 00 <74> 93 4a 8d 3c 2a 48 81 c7 80 01 00 00 48 89 f8 48 c1 e8 03 80 3c
RSP: 0018:ffffc90000a17380 EFLAGS: 00000206
RAX: 1ffff1102bfff8c3 RBX: ffff88815fffc490 RCX: dffffc0000000000
RDX: ffff88815fffc300 RSI: 0000000000000002 RDI: ffff88815fffc618
RBP: ffff88815fffc5b8 R08: ffff88815fffca17 R09: 1ffff1102bfff942
R10: dffffc0000000000 R11: ffffed102bfff943 R12: ffff88815fffc480
R13: 0000000000000138 R14: ffff88815fffc4c0 R15: 0000000000000003
FS:  0000000000000000(0000) GS:ffff88818e326000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa83cca66c0 CR3: 0000000104722000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 zone_watermark_fast+0x162/0x230
 get_page_from_freelist+0x5d5/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x86/0x3a0
 ___slab_alloc+0xd82/0x1760
 __slab_alloc+0x65/0x100
 __kmalloc_node_track_caller_noprof+0x5b7/0x7f0
 kmalloc_reserve+0x136/0x290
 __alloc_skb+0x204/0x390
 nsim_dev_trap_report_work+0x29a/0xb80
 process_scheduled_works+0xaec/0x17a0
 worker_thread+0x89f/0xd90
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>
