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BUG: KMSAN: uninit-value in __hfsplus_ext_read_extent fs/hfsplus/extents.c:167 [inline]
BUG: KMSAN: uninit-value in __hfsplus_ext_cache_extent+0x7cb/0x990 fs/hfsplus/extents.c:191
 __hfsplus_ext_read_extent fs/hfsplus/extents.c:167 [inline]
 __hfsplus_ext_cache_extent+0x7cb/0x990 fs/hfsplus/extents.c:191
 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline]
 hfsplus_file_extend+0x7b5/0x1df0 fs/hfsplus/extents.c:462
 hfsplus_get_block+0xfc3/0x1a20 fs/hfsplus/extents.c:245
 __block_write_begin_int+0xaab/0x3000 fs/buffer.c:2151
 block_write_begin fs/buffer.c:2262 [inline]
 cont_write_begin+0x10df/0x1ba0 fs/buffer.c:2601
 hfsplus_write_begin+0x85/0x130 fs/hfsplus/inode.c:46
 generic_perform_write+0x3f7/0x10c0 mm/filemap.c:4103
 __generic_file_write_iter+0x213/0x460 mm/filemap.c:4220
 generic_file_write_iter+0x131/0x980 mm/filemap.c:4246
 do_iter_readv_writev+0x93e/0xb90 fs/read_write.c:-1
 vfs_writev+0x51c/0x1420 fs/read_write.c:1055
 do_pwritev fs/read_write.c:1151 [inline]
 __do_sys_pwritev2 fs/read_write.c:1209 [inline]
 __se_sys_pwritev2+0x22f/0x470 fs/read_write.c:1200
 __x64_sys_pwritev2+0xe4/0x150 fs/read_write.c:1200
 x64_sys_call+0x22b9/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:329
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4153 [inline]
 slab_alloc_node mm/slub.c:4196 [inline]
 __do_kmalloc_node mm/slub.c:4326 [inline]
 __kmalloc_noprof+0x95f/0x1310 mm/slub.c:4339
 kmalloc_noprof include/linux/slab.h:909 [inline]
 hfsplus_find_init+0x90/0x1d0 fs/hfsplus/bfind.c:21
 hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline]
 hfsplus_file_extend+0x72f/0x1df0 fs/hfsplus/extents.c:462
 hfsplus_get_block+0xfc3/0x1a20 fs/hfsplus/extents.c:245
 __block_write_begin_int+0xaab/0x3000 fs/buffer.c:2151
 block_write_begin fs/buffer.c:2262 [inline]
 cont_write_begin+0x10df/0x1ba0 fs/buffer.c:2601
 hfsplus_write_begin+0x85/0x130 fs/hfsplus/inode.c:46
 generic_perform_write+0x3f7/0x10c0 mm/filemap.c:4103
 __generic_file_write_iter+0x213/0x460 mm/filemap.c:4220
 generic_file_write_iter+0x131/0x980 mm/filemap.c:4246
 do_iter_readv_writev+0x93e/0xb90 fs/read_write.c:-1
 vfs_writev+0x51c/0x1420 fs/read_write.c:1055
 do_pwritev fs/read_write.c:1151 [inline]
 __do_sys_pwritev2 fs/read_write.c:1209 [inline]
 __se_sys_pwritev2+0x22f/0x470 fs/read_write.c:1200
 __x64_sys_pwritev2+0xe4/0x150 fs/read_write.c:1200
 x64_sys_call+0x22b9/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:329
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 6038 Comm: syz.3.24 Not tainted 6.15.0-rc7-syzkaller-00175-g0f8c0258bf04 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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