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: 9029 Comm: syz-executor6 Not tainted 4.13.0-next-20170908+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801c35d2280 task.stack: ffff8801d15e8000 RIP: 0010:loop_set_fd drivers/block/loop.c:885 [inline] RIP: 0010:lo_ioctl+0x678/0x1b80 drivers/block/loop.c:1353 RSP: 0018:ffff8801d15efaa0 EFLAGS: 00010202 RAX: 0000000000010000 RBX: dffffc0000000000 RCX: ffffc900036db000 RDX: 000000000000003b RSI: ffffffff83539418 RDI: 00000000000001d8 RBP: ffff8801d15efb18 R08: ffffffff85b381a0 R09: 1ffff1003a2bdefd R10: ffff8801c35d2280 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8801d4977680 R14: ffff8801cf950140 R15: ffff8801d49777d8 FS: 00007f38ee051700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020e61000 CR3: 00000001d94cc000 CR4: 00000000001426f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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:1870 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:00007f38ee050c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 0000000000451e59 RDX: 000000000000001b RSI: 0000000000004c00 RDI: 0000000000000017 RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b7313 R13: 00000000ffffffff R14: 0000000000000005 R15: 0000000000000017 Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 1a 00 0f 85 81 14 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 d8 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 1a 00 0f 85 56 14 00 00 4d 8b a4 24 d8 01 00 00 4c 89 e2 RIP: loop_set_fd drivers/block/loop.c:885 [inline] RSP: ffff8801d15efaa0 RIP: lo_ioctl+0x678/0x1b80 drivers/block/loop.c:1353 RSP: ffff8801d15efaa0 ---[ end trace 993dbc91f591ad22 ]--- Kernel panic - not syncing: Fatal exception netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 13 bytes leftover after parsing attributes in process `syz-executor2'. mmap: syz-executor1 (9064): VmData 15810560 exceed data ulimit 4. Update limits or use boot option ignore_rlimit_data. netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 13 bytes leftover after parsing attributes in process `syz-executor2'. Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..