GDTBase=fffffe0000001000 IDTBase=fffffe0000000000 CR0=0000000080050033 CR3=00000001a9eb6000 CR4=00000000001426f0 Sysenter RSP=fffffe0000002200 CS:RIP=0010:ffffffff86c01380 kasan: GPF could be caused by NULL-ptr deref or user memory access EFER = 0x0000000000000d01 PAT = 0x0000000000000000 general protection fault: 0000 [#1] SMP KASAN *** Control State *** CPU: 1 PID: 12452 Comm: syz-executor5 Not tainted 4.18.0-rc8+ #184 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:loop_validate_file+0x247/0x470 drivers/block/loop.c:664 PinBased=0000003f CPUBased=b5986dfa SecondaryExec=000000ca Code: 00 00 48 89 f8 EntryControls=0000d1ff ExitControls=0023efff 48 c1 e8 03 80 3c 18 ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 00 0f 85 2e 02 00 00 VMEntry: intr_info=00000306 errcode=00000000 ilen=00000000 4d 8b a4 24 f0 00 00 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 00 49 8d bc 24 b8 01 reason=80000021 qualification=0000000000000000 00 00 48 89 f8 48 c1 IDTVectoring: info=00000000 errcode=00000000 e8 03 <80> 3c 18 00 0f TSC Offset = 0xfffffd6892d7482b 85 03 02 00 00 4d 8b a4 EPT pointer = 0x000000018ef6001e 24 b8 01 00 00 4c 89 e0 VFS: Can't find a Minix filesystem V1 | V2 | V3 on device loop1. 48 RSP: 0018:ffff8801918df8f8 EFLAGS: 00010202 RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc9000906d000 RDX: 0000000000000047 RSI: ffffffff83da08d7 RDI: 00000000000001b8 RBP: ffff8801918df918 R08: ffff8801c67ea700 R09: ffffed003b6246d6 R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8801d5726880 R14: 0000000000000002 R15: ffff8801aa4e1340 FS: 00007fb0b5529700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb0b5528db8 CR3: 000000019182a000 CR4: 00000000001426e0 Call Trace: loop_set_fd drivers/block/loop.c:928 [inline] lo_ioctl+0x54d/0x1d10 drivers/block/loop.c:1411 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x9cd/0x2030 block/ioctl.c:601 block_ioctl+0xee/0x130 fs/block_dev.c:1881 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb0b5528c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb0b55296d4 RCX: 0000000000457089 RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005 RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cf070 R14: 00000000004c58e0 R15: 0000000000000002 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 5c1f389923fd1a72 ]--- RIP: 0010:loop_validate_file+0x247/0x470 drivers/block/loop.c:664 Code: 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 2e 02 00 00 4d 8b a4 24 f0 00 00 00 49 8d bc 24 b8 01 00 00 48 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 03 02 00 00 4d 8b a4 24 b8 01 00 00 4c 89 e0 48 RSP: 0018:ffff8801918df8f8 EFLAGS: 00010202 RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc9000906d000 RDX: 0000000000000047 RSI: ffffffff83da08d7 RDI: 00000000000001b8 RBP: ffff8801918df918 R08: ffff8801c67ea700 R09: ffffed003b6246d6 R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000000 R13: ffff8801d5726880 R14: 0000000000000002 R15: ffff8801aa4e1340 FS: 00007fb0b5529700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb0b5528db8 CR3: 000000019182a000 CR4: 00000000001426e0