R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f4e5cf77fe0 R15: 0000000020000300 ------------[ cut here ]------------ kobject: '(null)' (ffff88807cd1c190): is not initialized, yet kobject_put() is being called. WARNING: CPU: 0 PID: 24147 at lib/kobject.c:750 kobject_put+0x22b/0x540 lib/kobject.c:750 Modules linked in: CPU: 0 PID: 24147 Comm: syz-executor.3 Not tainted 5.17.0-rc6-next-20220303-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kobject_put+0x22b/0x540 lib/kobject.c:750 Code: e8 6a 83 67 fd 48 89 e8 48 c1 e8 03 42 80 3c 20 00 0f 85 94 02 00 00 48 8b 75 00 48 89 ea 48 c7 c7 c0 0d 2a 8a e8 c1 5b 07 05 <0f> 0b e9 32 fe ff ff e8 39 83 67 fd 4d 89 f9 48 89 e9 4c 89 f2 49 RSP: 0018:ffffc9000343fc48 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff81602878 RDI: fffff52000687f7b RBP: ffff88807cd1c190 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815fd23e R11: 0000000000000000 R12: dffffc0000000000 R13: ffff88807cd1c1cc R14: ffff88807e0db8f8 R15: ffff888074a34068 FS: 00007f4e5cf78700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4e5cf79000 CR3: 000000007978d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: erofs_unregister_sysfs+0x46/0x60 fs/erofs/sysfs.c:225 erofs_put_super+0x37/0xb0 fs/erofs/super.c:771 generic_shutdown_super+0x14c/0x400 fs/super.c:462 kill_block_super+0x97/0xf0 fs/super.c:1394 erofs_kill_sb+0x60/0x190 fs/erofs/super.c:752 deactivate_locked_super+0x94/0x160 fs/super.c:332 get_tree_bdev+0x573/0x760 fs/super.c:1294 vfs_get_tree+0x89/0x2f0 fs/super.c:1497 do_new_mount fs/namespace.c:3025 [inline] path_mount+0x1320/0x1fa0 fs/namespace.c:3355 do_mount fs/namespace.c:3368 [inline] __do_sys_mount fs/namespace.c:3576 [inline] __se_sys_mount fs/namespace.c:3553 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3553 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f4e5be8a57a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4e5cf77f88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000080 RCX: 00007f4e5be8a57a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f4e5cf77fe0 RBP: 00007f4e5cf78020 R08: 00007f4e5cf78020 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f4e5cf77fe0 R15: 0000000020000300