RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffdc37fdc10 RBP: 00007ffdc37fdc10 R08: 00007ffdc37fdc50 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200000b0 R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000002 ------------[ cut here ]------------ kobject: '(null)' (ffff88801c085990): is not initialized, yet kobject_put() is being called. WARNING: CPU: 0 PID: 4059 at lib/kobject.c:750 kobject_put+0x17d/0x410 lib/kobject.c:750 Modules linked in: CPU: 0 PID: 4059 Comm: syz-executor202 Not tainted 5.17.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kobject_put+0x17d/0x410 lib/kobject.c:750 Code: ff e9 1a ff ff ff 48 89 e8 48 c1 e8 03 80 3c 18 00 0f 85 10 02 00 00 48 8b 75 00 48 89 ea 48 c7 c7 40 89 45 89 e8 ef 6b 8d 04 <0f> 0b e9 c7 fe ff ff c3 4d 89 f9 49 c7 c0 60 91 45 89 48 89 e9 4c RSP: 0018:ffffc900023bfc48 EFLAGS: 00010286 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff89426fe0 RDI: fffff52000477f7b RBP: ffff88801c085990 R08: 0000000000000001 R09: ffff8880b9e34187 R10: ffffed10173c6830 R11: 0000000000000001 R12: ffff88801c0859cc R13: ffff88807c1fe678 R14: ffff88807c1fe000 R15: ffff88807c1fe068 FS: 0000555555b1c300(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcedd930b04 CR3: 000000001d4ec000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: erofs_unregister_sysfs+0x41/0x60 fs/erofs/sysfs.c:225 erofs_put_super+0x32/0xb0 fs/erofs/super.c:771 generic_shutdown_super+0x12e/0x3a0 fs/super.c:462 kill_block_super+0x90/0xd0 fs/super.c:1394 erofs_kill_sb+0x46/0x160 fs/erofs/super.c:752 deactivate_locked_super+0x7b/0x130 fs/super.c:332 get_tree_bdev+0x4a5/0x680 fs/super.c:1294 vfs_get_tree+0x7f/0x2c0 fs/super.c:1497 do_new_mount fs/namespace.c:3026 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3356 do_mount fs/namespace.c:3369 [inline] __do_sys_mount fs/namespace.c:3577 [inline] __se_sys_mount fs/namespace.c:3554 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3554 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: 0033:0x7fcedd8d742a Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdc37fdbf8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffdc37fdc50 RCX: 00007fcedd8d742a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffdc37fdc10 RBP: 00007ffdc37fdc10 R08: 00007ffdc37fdc50 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200000b0 R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000002