audit: type=1400 audit(1521073759.219:108): avc:  denied  { fsetid } for  pid=17219 comm="syz-executor5" capability=4  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: 17236 Comm: syz-executor1 Not tainted 4.16.0-rc5+ #263
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rdma_listen+0x72/0x8e0 drivers/infiniband/core/cma.c:3300
RSP: 0018:ffff8801aec37948 EFLAGS: 00010207
RAX: 0000000000000042 RBX: 0000000000000000 RCX: ffffffff841d8ef4
RDX: 0000000000000079 RSI: ffffc90002ecc000 RDI: 0000000000000214
RBP: ffff8801aec379e0 R08: ffffffff87450380 R09: 0000000000000000
R10: ffffffff886133c0 R11: 0000000000000000 R12: 1ffff10035d86f2b
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000400
FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f77cbb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000081163b4 CR3: 00000001c3e83005 CR4: 00000000001626f0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 ucma_listen+0x172/0x1f0 drivers/infiniband/core/ucma.c:1064
 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: 0023:0xf7ff0c99
RSP: 002b:00000000f77cb09c EFLAGS: 00000286 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000015 RCX: 0000000020000480
RDX: 0000000000000014 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: 90 8e 1d 84 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 ac 88 53 fd 48 8d bb 14 02 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 14 28 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 
RIP: rdma_listen+0x72/0x8e0 drivers/infiniband/core/cma.c:3300 RSP: ffff8801aec37948
---[ end trace e1006b9fa3928fce ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..