kasan: GPF could be caused by NULL-ptr deref or user memory access minix_free_inode: bit 1 already cleared general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 11001 Comm: syz-executor3 Not tainted 4.19.0+ #302 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:665 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:ffff8801880678f8 EFLAGS: 00010202 RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc90007ea6000 RDX: 0000000000000080 RSI: ffffffff844d5557 RDI: 00000000000001b8 RBP: ffff880188067918 R08: ffff8801c3b925c0 R09: ffffed003b5c5b57 R10: 0000000000000002 R11: ffff8801dae2dabb R12: 0000000000000000 R13: ffff8801c4e16940 R14: 0000000000000002 R15: ffff8801c4e16940 FS: 00007f14e0314700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001cdc018 CR3: 00000001bfa2b000 CR4: 00000000001426f0 Call Trace: loop_set_fd drivers/block/loop.c:927 [inline] lo_ioctl+0x55c/0x1d80 drivers/block/loop.c:1410 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x9ac/0x2010 block/ioctl.c:601 block_ioctl+0xee/0x130 fs/block_dev.c:1883 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f14e0313c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f14e03146d4 R13: 00000000004c0459 R14: 00000000004d0600 R15: 00000000ffffffff Modules linked in: ---[ end trace 0bc0f91070f8d11c ]--- RIP: 0010:loop_validate_file+0x247/0x470 drivers/block/loop.c:665 kobject: 'loop0' (0000000096118e90): kobject_uevent_env 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 kobject: 'loop0' (0000000096118e90): fill_kobj_path: path = '/devices/virtual/block/loop0' RSP: 0018:ffff8801880678f8 EFLAGS: 00010202 RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc90007ea6000 kobject: 'loop5' (000000000ccc1199): kobject_uevent_env RDX: 0000000000000080 RSI: ffffffff844d5557 RDI: 00000000000001b8 kobject: 'loop5' (000000000ccc1199): fill_kobj_path: path = '/devices/virtual/block/loop5' RBP: ffff880188067918 R08: ffff8801c3b925c0 R09: ffffed003b5c5b57 kobject: 'loop2' (00000000d202d05c): kobject_uevent_env kobject: 'loop2' (00000000d202d05c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (0000000096118e90): kobject_uevent_env kobject: 'loop0' (0000000096118e90): fill_kobj_path: path = '/devices/virtual/block/loop0' R10: 0000000000000002 R11: ffff8801dae2dabb R12: 0000000000000000 kobject: 'loop5' (000000000ccc1199): kobject_uevent_env kobject: 'loop4' (0000000042f0bc74): kobject_uevent_env kobject: 'loop5' (000000000ccc1199): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000042f0bc74): fill_kobj_path: path = '/devices/virtual/block/loop4' VFS: Can't find a Minix filesystem V1 | V2 | V3 on device loop5. R13: ffff8801c4e16940 R14: 0000000000000002 R15: ffff8801c4e16940 FS: 00007f14e0314700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 kobject: 'loop2' (00000000d202d05c): kobject_uevent_env kobject: 'loop5' (000000000ccc1199): kobject_uevent_env kobject: 'loop2' (00000000d202d05c): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000000ccc1199): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (0000000096118e90): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000bfcfd0 CR3: 00000001bfa2b000 CR4: 00000000001426e0 kobject: 'loop0' (0000000096118e90): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000d202d05c): kobject_uevent_env