=====================================================
BUG: KMSAN: uninit-value in __hfsplus_ext_read_extent fs/hfsplus/extents.c:167 [inline]
BUG: KMSAN: uninit-value in __hfsplus_ext_cache_extent+0x82c/0x970 fs/hfsplus/extents.c:191
 __hfsplus_ext_read_extent fs/hfsplus/extents.c:167 [inline]
 __hfsplus_ext_cache_extent+0x82c/0x970 fs/hfsplus/extents.c:191
 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline]
 hfsplus_file_extend+0x775/0x1b90 fs/hfsplus/extents.c:462
 hfsplus_get_block+0xe99/0x1690 fs/hfsplus/extents.c:245
 __block_write_begin_int+0xa73/0x2f80 fs/buffer.c:2116
 block_write_begin fs/buffer.c:2227 [inline]
 cont_write_begin+0xf84/0x1950 fs/buffer.c:2566
 hfsplus_write_begin+0x85/0x120 fs/hfsplus/inode.c:46
 generic_perform_write+0x405/0x1060 mm/filemap.c:4102
 __generic_file_write_iter+0x207/0x460 mm/filemap.c:4219
 generic_file_write_iter+0x10c/0x930 mm/filemap.c:4245
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0xb34/0x1540 fs/read_write.c:684
 ksys_write+0x240/0x4b0 fs/read_write.c:736
 __do_sys_write fs/read_write.c:747 [inline]
 __se_sys_write fs/read_write.c:744 [inline]
 __ia32_sys_write+0x91/0xe0 fs/read_write.c:744
 ia32_sys_call+0x2e7b/0x41f0 arch/x86/include/generated/asm/syscalls_32.h:5
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4157 [inline]
 slab_alloc_node mm/slub.c:4200 [inline]
 __do_kmalloc_node mm/slub.c:4330 [inline]
 __kmalloc_noprof+0x946/0x1260 mm/slub.c:4343
 kmalloc_noprof include/linux/slab.h:909 [inline]
 hfsplus_find_init+0x97/0x1d0 fs/hfsplus/bfind.c:21
 hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline]
 hfsplus_file_extend+0x6d8/0x1b90 fs/hfsplus/extents.c:462
 hfsplus_get_block+0xe99/0x1690 fs/hfsplus/extents.c:245
 __block_write_begin_int+0xa73/0x2f80 fs/buffer.c:2116
 block_write_begin fs/buffer.c:2227 [inline]
 cont_write_begin+0xf84/0x1950 fs/buffer.c:2566
 hfsplus_write_begin+0x85/0x120 fs/hfsplus/inode.c:46
 generic_perform_write+0x405/0x1060 mm/filemap.c:4102
 __generic_file_write_iter+0x207/0x460 mm/filemap.c:4219
 generic_file_write_iter+0x10c/0x930 mm/filemap.c:4245
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0xb34/0x1540 fs/read_write.c:684
 ksys_write+0x240/0x4b0 fs/read_write.c:736
 __do_sys_write fs/read_write.c:747 [inline]
 __se_sys_write fs/read_write.c:744 [inline]
 __ia32_sys_write+0x91/0xe0 fs/read_write.c:744
 ia32_sys_call+0x2e7b/0x41f0 arch/x86/include/generated/asm/syscalls_32.h:5
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

CPU: 1 UID: 0 PID: 14953 Comm: syz.6.3151 Not tainted 6.15.0-rc1-syzkaller-00246-g900241a5cc15 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
=====================================================