SELinux: unrecognized netlink message: protocol=0 nlmsg_type=54252 sclass=netlink_route_socket pig=20912 comm=syz-executor3 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: 20909 Comm: syz-executor0 Not tainted 4.13.0+ #70 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801c182c240 task.stack: ffff8801d6248000 RIP: 0010:loop_set_fd drivers/block/loop.c:900 [inline] RIP: 0010:lo_ioctl+0x5a6/0x1670 drivers/block/loop.c:1348 RSP: 0018:ffff8801d624fa98 EFLAGS: 00010202 RAX: 000000000000003b RBX: dffffc0000000000 RCX: ffffc9000188c000 RDX: 0000000000000064 RSI: ffffffff835090c6 RDI: 00000000000001d8 RBP: ffff8801d624fb18 R08: 0000000000000000 R09: 1ffff1003ac49efc R10: ffff8801c182c240 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8801cf967140 R14: ffff8801d4dba4c0 R15: ffff8801d4dba620 FS: 00007f0a56ed0700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002048e000 CR3: 00000001c6100000 CR4: 00000000001426e0 Call Trace: __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0xc07/0x1de0 block/ioctl.c:594 block_ioctl+0xea/0x130 fs/block_dev.c:1867 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x451e59 RSP: 002b:00007f0a56ecfc08 EFLAGS: 00000216 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000007180b0 RCX: 0000000000451e59 RDX: 0000000000000016 RSI: 0000000000004c00 RDI: 0000000000000006 RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000000000 R13: 0000000000a6f7ef R14: 00007f0a56ed09c0 R15: 0000000000000026 Code: 00 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 aa 10 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 d8 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 7f 10 00 00 4d 8b a4 24 d8 01 00 00 4c 89 e0 RIP: loop_set_fd drivers/block/loop.c:900 [inline] RSP: ffff8801d624fa98 RIP: lo_ioctl+0x5a6/0x1670 drivers/block/loop.c:1348 RSP: ffff8801d624fa98 ---[ end trace dcf27e8249486988 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..