audit: type=1400 audit(1521438873.705:8): avc:  denied  { map } for  pid=4231 comm="syz-execprog" path="/root/syzkaller-shm890918109" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1
IPVS: ftp: loaded support on port[0] = 21
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4469 Comm: syz-executor0 Not tainted 4.16.0-rc5+ #268
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0xa09/0x3e00 kernel/locking/lockdep.c:3310
RSP: 0018:ffff8801b2ae7320 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000046 RSI: 0000000000000000 RDI: ffffffff86ec9ce0
RBP: ffff8801b2ae76b0 R08: ffffffff841ce509 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000230 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801b0ab8000
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7fc5b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000813b029 CR3: 00000001b0735005 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152
 cma_exch drivers/infiniband/core/cma.c:461 [inline]
 rdma_destroy_id+0xa9/0xda0 drivers/infiniband/core/cma.c:1660
 ucma_destroy_id+0x2e9/0x4c0 drivers/infiniband/core/ucma.c:606
 ucma_write+0x2d6/0x3d0 drivers/infiniband/core/ucma.c:1633
 __vfs_write+0xef/0x970 fs/read_write.c:480
 vfs_write+0x189/0x510 fs/read_write.c:544
 SYSC_write fs/read_write.c:589 [inline]
 SyS_write+0xef/0x220 fs/read_write.c:581
 do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7feac99
RSP: 002b:00000000f7fc509c EFLAGS: 00000286 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020000340
RDX: 0000000000000018 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: 81 c4 60 03 00 00 44 89 d0 5b 41 5a 41 5c 41 5d 41 5e 41 5f 5d 49 8d 62 f8 c3 4c 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 0a 33 00 00 49 81 3b e0 ed 9f 87 41 bd 00 00 
RIP: __lock_acquire+0xa09/0x3e00 kernel/locking/lockdep.c:3310 RSP: ffff8801b2ae7320
---[ end trace 50fdd25638ac735c ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..