loop8: detected capacity change from 0 to 1024
=====================================================
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+0x775/0x1ba0 fs/hfsplus/extents.c:462
 hfsplus_get_block+0xe99/0x1690 fs/hfsplus/extents.c:245
 __block_write_begin_int+0xa6b/0x2f80 fs/buffer.c:2116
 block_write_begin fs/buffer.c:2226 [inline]
 cont_write_begin+0xf82/0x1940 fs/buffer.c:2577
 hfsplus_write_begin+0x85/0x120 fs/hfsplus/inode.c:46
 cont_expand_zero fs/buffer.c:2504 [inline]
 cont_write_begin+0x32f/0x1940 fs/buffer.c:2567
 hfsplus_write_begin+0x85/0x120 fs/hfsplus/inode.c:46
 generic_perform_write+0x4d8/0x1080 mm/filemap.c:4055
 __generic_file_write_iter+0x207/0x460 mm/filemap.c:4156
 generic_file_write_iter+0x102/0x5b0 mm/filemap.c:4182
 __kernel_write_iter+0x675/0xd20 fs/read_write.c:612
 dump_emit_page fs/coredump.c:884 [inline]
 dump_user_range+0x8ed/0xef0 fs/coredump.c:945
 elf_core_dump+0x5583/0x5c30 fs/binfmt_elf.c:2129
 do_coredump+0x45d3/0x59d0 fs/coredump.c:758
 get_signal+0x24f1/0x2b70 kernel/signal.c:3002
 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]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x6a/0x160 kernel/entry/common.c:218
 do_syscall_64+0xda/0x1e0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4110 [inline]
 slab_alloc_node mm/slub.c:4153 [inline]
 __do_kmalloc_node mm/slub.c:4282 [inline]
 __kmalloc_noprof+0x923/0x1230 mm/slub.c:4295
 kmalloc_noprof include/linux/slab.h:905 [inline]
 hfsplus_find_init+0x95/0x1d0 fs/hfsplus/bfind.c:21
 hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline]
 hfsplus_file_extend+0x6d8/0x1ba0 fs/hfsplus/extents.c:462
 hfsplus_get_block+0xe99/0x1690 fs/hfsplus/extents.c:245
 __block_write_begin_int+0xa6b/0x2f80 fs/buffer.c:2116
 block_write_begin fs/buffer.c:2226 [inline]
 cont_write_begin+0xf82/0x1940 fs/buffer.c:2577
 hfsplus_write_begin+0x85/0x120 fs/hfsplus/inode.c:46
 cont_expand_zero fs/buffer.c:2504 [inline]
 cont_write_begin+0x32f/0x1940 fs/buffer.c:2567
 hfsplus_write_begin+0x85/0x120 fs/hfsplus/inode.c:46
 generic_perform_write+0x4d8/0x1080 mm/filemap.c:4055
 __generic_file_write_iter+0x207/0x460 mm/filemap.c:4156
 generic_file_write_iter+0x102/0x5b0 mm/filemap.c:4182
 __kernel_write_iter+0x675/0xd20 fs/read_write.c:612
 dump_emit_page fs/coredump.c:884 [inline]
 dump_user_range+0x8ed/0xef0 fs/coredump.c:945
 elf_core_dump+0x5583/0x5c30 fs/binfmt_elf.c:2129
 do_coredump+0x45d3/0x59d0 fs/coredump.c:758
 get_signal+0x24f1/0x2b70 kernel/signal.c:3002
 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]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x6a/0x160 kernel/entry/common.c:218
 do_syscall_64+0xda/0x1e0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 14710 Comm: syz.8.2605 Tainted: G        W          6.13.0-rc1-syzkaller-00025-gfeffde684ac2 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
=====================================================