audit: type=1400 audit(1559985421.807:10): avc:  denied  { map } for  pid=19669 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1
INFO: task syz-executor.0:19664 blocked for more than 140 seconds.
      Not tainted 4.14.123+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28808 19664   1963 0x80000000
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x21f/0x3c0 kernel/locking/rwsem-xadd.c:309
 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.0:19666 blocked for more than 140 seconds.
      Not tainted 4.14.123+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28912 19666   1963 0x80000000
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x21f/0x3c0 kernel/locking/rwsem-xadd.c:309
 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:4541
2 locks held by getty/1759:
 #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.0/19664:
 #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.0/19666:
 #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 4.14.123+ #2
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: 19667 Comm: syz-executor.0 Not tainted 4.14.123+ #2
task:         (ptrval) task.stack:         (ptrval)
RIP: 0010:hlock_class kernel/locking/lockdep.c:148 [inline]
RIP: 0010:mark_lock+0x28/0xfa0 kernel/locking/lockdep.c:3164
RSP: 0018:ffff8881d69c7860 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: ffff8881d01e9ffa RCX: 0000000000000008
RDX: ffff8881d01e9ff8 RSI: ffff8881d01e9fd8 RDI: ffff8881d01e9780
RBP: ffff8881d69c7a48 R08: 0000000000000001 R09: 000000000004036f
R10: ffff8881d01e9fd8 R11: 1ffff1103a03d3fa R12: 0000000000000001
R13: ffff8881d01e9ff8 R14: ffff8881d01e9780 R15: 0000000000000008
FS:  00007f2adb56c700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000014403e0 CR3: 00000001ca84e002 CR4: 00000000001606b0
Call Trace:
 __lock_acquire+0x56a/0x3fa0 kernel/locking/lockdep.c:3448
 lock_acquire+0x10f/0x380 kernel/locking/lockdep.c:3991
 __mutex_lock_common kernel/locking/mutex.c:756 [inline]
 __mutex_lock+0xf7/0x1430 kernel/locking/mutex.c:893
 perf_mmap+0x50c/0x1390 kernel/events/core.c:5416
 call_mmap include/linux/fs.h:1790 [inline]
 mmap_region+0x7c9/0xf00 mm/mmap.c:1732
 do_mmap+0x548/0xb80 mm/mmap.c:1510
 do_mmap_pgoff include/linux/mm.h:2180 [inline]
 vm_mmap_pgoff+0x177/0x1c0 mm/util.c:333
 SYSC_mmap_pgoff mm/mmap.c:1560 [inline]
 SyS_mmap_pgoff+0xf4/0x1b0 mm/mmap.c:1518
 do_syscall_64+0x19b/0x510 arch/x86/entry/common.c:292
Code: 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 89 d1 41 89 d7 41 56 49 89 fe 41 55 4c 8d 6e 20 4c 89 ea 41 54 41 bc 01 00 00 00 55 <48> c1 ea 03 41 d3 e4 48 89 f5 53 48 83 ec 18 0f b6 04 02 84 c0