INFO: task syz-executor.3:11943 blocked for more than 140 seconds.
      Not tainted 4.14.113+ #59
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28808 11943   1912 0x80000000
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:276 [inline]
 rwsem_down_read_failed+0x21f/0x3c0 kernel/locking/rwsem-xadd.c:293
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:66 [inline]
 down_read+0x45/0xa0 kernel/locking/rwsem.c:26
 exit_mm kernel/exit.c:511 [inline]
 do_exit+0x503/0x2960 kernel/exit.c:861
INFO: task syz-executor.3:11945 blocked for more than 140 seconds.
      Not tainted 4.14.113+ #59
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28912 11945   1912 0x80000000
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:276 [inline]
 rwsem_down_read_failed+0x21f/0x3c0 kernel/locking/rwsem-xadd.c:293
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:66 [inline]
 down_read+0x45/0xa0 kernel/locking/rwsem.c:26
 exit_mm kernel/exit.c:511 [inline]
 do_exit+0x503/0x2960 kernel/exit.c:861

Showing all locks held in the system:
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.+}, at: [<        (ptrval)>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4544
2 locks held by getty/1760:
 #0:  (&tty->ldisc_sem){++++}, at: [<        (ptrval)>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<        (ptrval)>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.3/11943:
 #0:  (&mm->mmap_sem){++++}, at: [<        (ptrval)>] exit_mm kernel/exit.c:511 [inline]
 #0:  (&mm->mmap_sem){++++}, at: [<        (ptrval)>] do_exit+0x503/0x2960 kernel/exit.c:861
1 lock held by syz-executor.3/11945:
 #0:  (&mm->mmap_sem){++++}, at: [<        (ptrval)>] exit_mm kernel/exit.c:511 [inline]
 #0:  (&mm->mmap_sem){++++}, at: [<        (ptrval)>] do_exit+0x503/0x2960 kernel/exit.c:861

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

NMI backtrace for cpu 1
CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.113+ #59
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x10e lib/dump_stack.c:53
 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11950 Comm: syz-executor.3 Not tainted 4.14.113+ #59
task:         (ptrval) task.stack:         (ptrval)
RIP: 0010:__lock_is_held+0xd3/0x160 kernel/locking/lockdep.c:3823
RSP: 0018:ffff8881c2567a30 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff8881cc273730 RCX: 1ffffffff2d82558
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8881cc273752
RBP: 0000000000000001 R08: ffffffff94a0260c R09: dffffc0000000000
R10: ffff8881c2567c68 R11: 0000000000000001 R12: ffff8881cc273730
R13: ffffffff96ad3360 R14: dffffc0000000000 R15: ffff8881cc272f00
FS:  00007f3f7137f700(0000) GS:ffff8881d7600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002273000 CR3: 00000001ccdb6002 CR4: 00000000001606b0
Call Trace:
 lock_is_held_type+0xb3/0x150 kernel/locking/lockdep.c:4032
 lock_is_held include/linux/lockdep.h:437 [inline]
 ___might_sleep+0x1c6/0x280 kernel/sched/core.c:6084
Code: 84 d2 0f 85 9c 00 00 00 66 f7 43 22 f0 ff 74 0f 4c 89 ee 48 89 df e8 0d f8 ff ff 85 c0 75 1d 83 c5 01 41 39 af 28 08 00 00 7f 91 <48> 83 c4 08 31 c0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 83 7c 24 04