audit: type=1400 audit(1520478350.548:8): avc: denied { map } for pid=4250 comm="syz-execprog" path="/root/syzkaller-shm432705674" 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: 1 PID: 4763 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #255 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:ffff8801adcf7948 EFLAGS: 00010207 RAX: 0000000000000042 RBX: 0000000000000000 RCX: ffffffff841d7a24 RDX: 0000000000000000 RSI: 0000000000000400 RDI: 0000000000000214 RBP: ffff8801adcf79e0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff88613380 R11: 0000000000000000 R12: 1ffff10035b9ef2b R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000400 FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f84b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000000813b029 CR3: 00000001adfb1002 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ucma_listen+0x172/0x1f0 drivers/infiniband/core/ucma.c:1064 ucma_write+0x2d6/0x3d0 drivers/infiniband/core/ucma.c:1627 __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: 0023:0xf7fa9c99 RSP: 002b:00000000f7f8409c EFLAGS: 00000286 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020004400 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: c0 79 1d 84 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 ec 8b 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: ffff8801adcf7948 ---[ end trace 7540ad667ee5f1f1 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..