=====================================================
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
 __kernel_write_iter+0x66b/0xd20 fs/read_write.c:617
 dump_emit_page fs/coredump.c:885 [inline]
 dump_user_range+0xdea/0x1500 fs/coredump.c:959
 elf_core_dump+0x5e38/0x64a0 fs/binfmt_elf.c:2128
 do_coredump+0x4733/0x5df0 fs/coredump.c:759
 get_signal+0x2170/0x2d40 kernel/signal.c:3019
 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 irqentry_exit_to_user_mode+0xb9/0x150 kernel/entry/common.c:231
 irqentry_exit+0x16/0x60 kernel/entry/common.c:334
 exc_general_protection+0x2e6/0x4b0 arch/x86/kernel/traps.c:791
 asm_exc_general_protection+0x2b/0x30 arch/x86/include/asm/idtentry.h:617

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
 __kernel_write_iter+0x66b/0xd20 fs/read_write.c:617
 dump_emit_page fs/coredump.c:885 [inline]
 dump_user_range+0xdea/0x1500 fs/coredump.c:959
 elf_core_dump+0x5e38/0x64a0 fs/binfmt_elf.c:2128
 do_coredump+0x4733/0x5df0 fs/coredump.c:759
 get_signal+0x2170/0x2d40 kernel/signal.c:3019
 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 irqentry_exit_to_user_mode+0xb9/0x150 kernel/entry/common.c:231
 irqentry_exit+0x16/0x60 kernel/entry/common.c:334
 exc_general_protection+0x2e6/0x4b0 arch/x86/kernel/traps.c:791
 asm_exc_general_protection+0x2b/0x30 arch/x86/include/asm/idtentry.h:617

CPU: 1 UID: 0 PID: 9733 Comm: syz.5.894 Not tainted 6.15.0-rc1-syzkaller-00060-ga24588245776 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
=====================================================