audit: type=1400 audit(1521385422.571:67): avc:  denied  { net_bind_service } for  pid=10291 comm="syz-executor2" capability=10  scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1
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: 10313 Comm: syz-executor0 Not tainted 4.16.0-rc5+ #267
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:perf_trace_lock_acquire+0xc0/0x980 include/trace/events/lock.h:13
RSP: 0018:ffff8801d7a4f4f0 EFLAGS: 00010002
RAX: 0000000000000049 RBX: 1ffff1003af49ea8 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000230 RDI: ffffffff86f2c4a0
RBP: ffff8801d7a4f6c8 R08: 0000000000000000 R09: 0000000000000230
R10: dffffc0000000000 R11: ffffffff81562510 R12: ffff8801d7a4f6a0
R13: 0000000000000000 R14: ffffffff86f2c4a0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f777db40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7780db0 CR3: 00000001d3b4a001 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x394/0x580 kernel/locking/lockdep.c:3919
 __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: 0023:0xf7fa2c99
RSP: 002b:00000000f777d09c EFLAGS: 00000286 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 00000000200003c0
RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: c7 40 1c 00 f2 f2 f2 c7 40 20 f2 f2 f2 f2 c7 40 24 00 f2 f2 f2 c7 40 28 f3 f3 f3 f3 48 8d 46 18 48 89 85 70 fe ff ff 48 c1 e8 03 <80> 3c 10 00 0f 85 da 04 00 00 49 8b 79 18 48 85 ff 0f 84 62 04 
RIP: perf_trace_lock_acquire+0xc0/0x980 include/trace/events/lock.h:13 RSP: ffff8801d7a4f4f0
---[ end trace 7281c7ac161cc5de ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..