EXT4-fs error (device loop3): ext4_fill_super:4944: inode #2: comm syz-executor.3: iget: root inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: work_struct hint: flush_stashed_error_work+0x0/0xa0 fs/ext4/super.c:5764 WARNING: CPU: 0 PID: 9913 at lib/debugobjects.c:508 debug_print_object+0x96/0x110 lib/debugobjects.c:505 Modules linked in: CPU: 0 PID: 9913 Comm: syz-executor.3 Not tainted 5.10.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_print_object+0x96/0x110 lib/debugobjects.c:505 Code: ff ff ff ff 48 89 f7 48 29 c7 48 83 ff 30 48 89 f8 77 5c 48 8b 14 dd c0 ee 4c 85 4c 89 e6 48 c7 c7 e8 35 bc 84 e8 33 9a 8f 01 <0f> 0b 83 05 3d 92 c0 03 01 48 83 c4 18 5b 5d 41 5c c3 83 05 2d 92 RSP: 0018:ffffc90001573b98 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000001 RDX: 0000000080000001 RSI: 0000000000000027 RDI: 00000000ffffffff RBP: ffffffff8402a960 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff84b96465 R13: ffffffff8402a960 R14: ffff88811ea7a6e0 R15: 0000000000000000 FS: 00007f46f1e63700(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000342aad8 CR3: 000000011f5fc000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:987 [inline] debug_check_no_obj_freed+0x1c5/0x200 lib/debugobjects.c:1018 slab_free_hook mm/slub.c:1536 [inline] slab_free_freelist_hook+0xef/0x130 mm/slub.c:1577 slab_free mm/slub.c:3142 [inline] kfree+0xe1/0x640 mm/slub.c:4124 ext4_fill_super+0x3d8/0x4480 fs/ext4/super.c:5180 mount_bdev+0x18c/0x1c0 fs/super.c:1419 legacy_get_tree+0x28/0x60 fs/fs_context.c:592 vfs_get_tree+0x1d/0xd0 fs/super.c:1549 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x75e/0xac0 fs/namespace.c:3205 do_mount+0x70/0x90 fs/namespace.c:3218 __do_sys_mount fs/namespace.c:3426 [inline] __se_sys_mount fs/namespace.c:3403 [inline] __x64_sys_mount+0xbf/0xe0 fs/namespace.c:3403 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x460b9a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 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 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f46f1e62a78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f46f1e62b10 RCX: 0000000000460b9a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f46f1e62ad0 RBP: 00007f46f1e62ad0 R08: 00007f46f1e62b10 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020014a00