loop4: detected capacity change from 0 to 1024
=====================================================
BUG: KMSAN: uninit-value in hfsplus_subfolders_dec fs/hfsplus/catalog.c:248 [inline]
BUG: KMSAN: uninit-value in hfsplus_delete_cat+0x1195/0x13d0 fs/hfsplus/catalog.c:419
 hfsplus_subfolders_dec fs/hfsplus/catalog.c:248 [inline]
 hfsplus_delete_cat+0x1195/0x13d0 fs/hfsplus/catalog.c:419
 hfsplus_rmdir+0x13c/0x310 fs/hfsplus/dir.c:425
 hfsplus_rename+0xf9/0x2f0 fs/hfsplus/dir.c:545
 vfs_rename+0x1f51/0x2530 fs/namei.c:5129
 do_renameat2+0x1484/0x1a50 fs/namei.c:5278
 __do_sys_rename fs/namei.c:5325 [inline]
 __se_sys_rename fs/namei.c:5323 [inline]
 __x64_sys_rename+0xd7/0x140 fs/namei.c:5323
 x64_sys_call+0x269/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was stored to memory at:
 hfsplus_subfolders_inc fs/hfsplus/catalog.c:232 [inline]
 hfsplus_create_cat+0x18fb/0x1910 fs/hfsplus/catalog.c:314
 hfsplus_mknod+0x208/0x560 fs/hfsplus/dir.c:494
 hfsplus_mkdir+0x5a/0x80 fs/hfsplus/dir.c:529
 vfs_mkdir+0x4ea/0x850 fs/namei.c:4366
 do_mkdirat+0x41a/0xf30 fs/namei.c:4399
 __do_sys_mkdirat fs/namei.c:4416 [inline]
 __se_sys_mkdirat fs/namei.c:4414 [inline]
 __x64_sys_mkdirat+0xc1/0x140 fs/namei.c:4414
 x64_sys_call+0x338/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:259
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 __alloc_frozen_pages_noprof+0x689/0xf00 mm/page_alloc.c:5171
 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2416
 alloc_frozen_pages_noprof+0xf7/0x200 mm/mempolicy.c:2487
 alloc_slab_page mm/slub.c:2492 [inline]
 allocate_slab+0x24d/0x1220 mm/slub.c:2660
 new_slab mm/slub.c:2714 [inline]
 ___slab_alloc+0xff3/0x3470 mm/slub.c:3901
 __slab_alloc mm/slub.c:3992 [inline]
 __slab_alloc_node mm/slub.c:4067 [inline]
 slab_alloc_node mm/slub.c:4228 [inline]
 kmem_cache_alloc_lru_noprof+0x922/0xed0 mm/slub.c:4259
 hfsplus_alloc_inode+0x5a/0xd0 fs/hfsplus/super.c:625
 alloc_inode+0x8a/0x4a0 fs/inode.c:346
 iget_locked+0x239/0x12d0 fs/inode.c:1438
 hfsplus_iget+0x5c/0xb80 fs/hfsplus/super.c:65
 hfsplus_lookup+0xd5f/0xf70 fs/hfsplus/dir.c:118
 __lookup_slow+0x560/0x760 fs/namei.c:1808
 lookup_slow+0x6a/0xd0 fs/namei.c:1825
 walk_component+0x444/0x650 fs/namei.c:2129
 lookup_last fs/namei.c:2630 [inline]
 path_lookupat+0x251/0x6b0 fs/namei.c:2654
 filename_lookup+0x2bd/0x800 fs/namei.c:2683
 user_path_at+0x91/0x3d0 fs/namei.c:3127
 do_sys_truncate+0x82/0x240 fs/open.c:139
 __do_sys_truncate fs/open.c:153 [inline]
 __se_sys_truncate fs/open.c:151 [inline]
 __x64_sys_truncate+0x74/0xb0 fs/open.c:151
 x64_sys_call+0x1f47/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:77
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 9021 Comm: syz.4.1190 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
=====================================================