audit: type=1326 audit(1604424388.740:65): auid=0 uid=0 gid=0 ses=4 pid=17775 comm="syz-executor.5" exe="/root/syz-executor.5" sig=9 arch=c000003e syscall=228 compat=0 ip=0x460d1a code=0x0
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 17795 Comm: syz-executor.5 Not tainted 4.14.203-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880a0aae380 task.stack: ffff888062bf8000
RIP: 0010:vgem_fence_attach_ioctl+0x2f8/0x6e0 drivers/gpu/drm/vgem/vgem_fence.c:184
RSP: 0018:ffff888062bffbb0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8880ab522080 RCX: ffffc90006ae3000
RDX: 000000000000001c RSI: ffffffff814a7e5c RDI: 00000000000000e0
RBP: ffff8880a1fb4a40 R08: ffffffff8bfdb448 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a2133cc0
R13: 1ffff1100c57ff78 R14: ffff8880ab522084 R15: 0000000000000000
FS:  00007f8257b02700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004e5170 CR3: 00000000a5c77000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 drm_ioctl_kernel+0x14c/0x200 drivers/gpu/drm/drm_ioctl.c:736
 drm_ioctl+0x419/0x870 drivers/gpu/drm/drm_ioctl.c:836
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45deb9
RSP: 002b:00007f8257b01c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000000c5c0 RCX: 000000000045deb9
RDX: 0000000020000140 RSI: 00000000c10c5541 RDI: 0000000000000004
RBP: 000000000118c0b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118c07c
R13: 00007ffdc776697f R14: 00007f8257b029c0 R15: 000000000118c07c
Code: ea 03 80 3c 02 00 0f 85 a2 03 00 00 4c 8b bd 18 01 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bf e0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 86 03 00 00 4c 89 f2 4d 8b bf e0 00 00 00 48 
RIP: vgem_fence_attach_ioctl+0x2f8/0x6e0 drivers/gpu/drm/vgem/vgem_fence.c:184 RSP: ffff888062bffbb0
sctp: [Deprecated]: syz-executor.2 (pid 17798) Use of struct sctp_assoc_value in delayed_ack socket option.
Use struct sctp_sack_info instead
---[ end trace e816ae6812e764ea ]---