invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9594 Comm: syz-executor5 Not tainted 4.20.0-rc5+ #362 ISOFS: Unable to identify CD-ROM format. Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:btrfs_close_one_device fs/btrfs/volumes.c:1039 [inline] RIP: 0010:close_fs_devices.part.44+0x7be/0xa20 fs/btrfs/volumes.c:1063 Code: 48 8d 7b 30 49 89 44 24 18 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 bd 01 00 00 48 83 6b 30 01 e9 7a fa ff ff e8 22 81 8c fe <0f> 0b e8 1b 81 8c fe 0f 0b e8 14 81 8c fe 0f 0b e9 6f fd ff ff e8 RSP: 0018:ffff8881837d71d8 EFLAGS: 00010212 RAX: 0000000000040000 RBX: ffff8881c4acf300 RCX: ffffc90005a9f000 RDX: 0000000000028699 RSI: ffffffff82f31a9e RDI: 0000000000000007 RBP: ffff8881837d7380 R08: ffff888181dd2180 R09: 0000000000000006 R10: 0000000000000000 R11: ffff888181dd2180 R12: ffff8881c5d4db40 R13: dffffc0000000000 R14: fffffffffffffff4 R15: 0000000000000000 FS: 00007fa25ddf6700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000a40021 CR3: 00000001ce9d3000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: close_fs_devices fs/btrfs/volumes.c:1095 [inline] btrfs_close_devices+0xa1/0x210 fs/btrfs/volumes.c:1081 btrfs_mount_root+0x13d2/0x1d70 fs/btrfs/super.c:1619 mount_fs+0xae/0x31d fs/super.c:1261 vfs_kern_mount.part.35+0xdc/0x4f0 fs/namespace.c:961 vfs_kern_mount+0x40/0x60 fs/namespace.c:951 btrfs_mount+0x4a3/0x2136 fs/btrfs/super.c:1670 mount_fs+0xae/0x31d fs/super.c:1261 vfs_kern_mount.part.35+0xdc/0x4f0 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x581/0x31f0 fs/namespace.c:2801 ksys_mount+0x12d/0x140 fs/namespace.c:3017 __do_sys_mount fs/namespace.c:3031 [inline] __se_sys_mount fs/namespace.c:3028 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3028 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459fda Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fa25ddf5a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa25ddf5b30 RCX: 0000000000459fda RDX: 00007fa25ddf5ad0 RSI: 0000000020000100 RDI: 00007fa25ddf5af0 RBP: 0000000020000100 R08: 00007fa25ddf5b30 R09: 00007fa25ddf5ad0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000004 R13: 0000000000000000 R14: 00000000004d8b70 R15: 0000000000000003 Modules linked in: ---[ end trace b30019811608809b ]--- kobject: 'loop3' (00000000b6444b98): kobject_uevent_env RIP: 0010:btrfs_close_one_device fs/btrfs/volumes.c:1039 [inline] RIP: 0010:close_fs_devices.part.44+0x7be/0xa20 fs/btrfs/volumes.c:1063 kobject: 'loop3' (00000000b6444b98): fill_kobj_path: path = '/devices/virtual/block/loop3' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop0' (0000000000fd763d): kobject_uevent_env CPU: 1 PID: 9599 Comm: syz-executor2 Tainted: G D 4.20.0-rc5+ #362 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Code: 48 8d 7b 30 49 89 44 24 18 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 bd 01 00 00 48 83 6b 30 01 e9 7a fa ff ff e8 22 81 8c fe <0f> 0b e8 1b 81 8c fe 0f 0b e8 14 81 8c fe 0f 0b e9 6f fd ff ff e8 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop0' (0000000000fd763d): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (000000005d614937): kobject_uevent_env kobject: 'loop1' (000000005d614937): fill_kobj_path: path = '/devices/virtual/block/loop1' __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x2be/0x730 mm/slab.c:3552 RSP: 0018:ffff8881837d71d8 EFLAGS: 00010212 kmem_cache_zalloc include/linux/slab.h:731 [inline] __kernfs_new_node+0x127/0x8d0 fs/kernfs/dir.c:634 RAX: 0000000000040000 RBX: ffff8881c4acf300 RCX: ffffc90005a9f000 RDX: 0000000000028699 RSI: ffffffff82f31a9e RDI: 0000000000000007 RBP: ffff8881837d7380 R08: ffff888181dd2180 R09: 0000000000000006 kernfs_new_node+0x95/0x120 fs/kernfs/dir.c:695 __kernfs_create_file+0x5a/0x340 fs/kernfs/file.c:992 R10: 0000000000000000 R11: ffff888181dd2180 R12: ffff8881c5d4db40 sysfs_add_file_mode_ns+0x222/0x530 fs/sysfs/file.c:306 create_files fs/sysfs/group.c:63 [inline] internal_create_group+0x3df/0xd80 fs/sysfs/group.c:147 R13: dffffc0000000000 R14: fffffffffffffff4 R15: 0000000000000000 sysfs_create_group+0x1f/0x30 fs/sysfs/group.c:173 FS: 00007fa25ddf6700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 loop_sysfs_init drivers/block/loop.c:839 [inline] loop_set_fd drivers/block/loop.c:964 [inline] lo_ioctl+0x1307/0x1d60 drivers/block/loop.c:1408 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x98e/0x21b0 block/ioctl.c:605 kobject: 'loop5' (000000008dd3898a): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 block_ioctl+0xee/0x130 fs/block_dev.c:1883 kobject: 'loop5' (000000008dd3898a): fill_kobj_path: path = '/devices/virtual/block/loop5' vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 CR2: 0000000000728000 CR3: 00000001ce9d3000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290