syzbot

loop6: detected capacity change from 0 to 1024
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BUG: KMSAN: uninit-value in hfsplus_lookup+0x674/0xf70 fs/hfsplus/dir.c:83
 hfsplus_lookup+0x674/0xf70 fs/hfsplus/dir.c:83
 __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

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+0x87/0x4a0 fs/inode.c:346
 iget_locked+0x239/0x12d0 fs/inode.c:1438
 hfsplus_iget+0x5c/0xb80 fs/hfsplus/super.c:65
 hfsplus_btree_open+0x128/0x1cf0 fs/hfsplus/btree.c:150
 hfsplus_fill_super+0x1161/0x2730 fs/hfsplus/super.c:472
 get_tree_bdev_flags+0x6e3/0x920 fs/super.c:1692
 get_tree_bdev+0x38/0x50 fs/super.c:1715
 hfsplus_get_tree+0x35/0x40 fs/hfsplus/super.c:638
 vfs_get_tree+0xb0/0x5c0 fs/super.c:1815
 do_new_mount+0x733/0x1420 fs/namespace.c:3808
 path_mount+0x6db/0x1e90 fs/namespace.c:4123
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x6eb/0x7d0 fs/namespace.c:4324
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4324
 x64_sys_call+0x3604/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:166
 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: 0 UID: 0 PID: 10616 Comm: syz.6.1127 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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