loop0: 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:461
 hfsplus_get_block+0xe99/0x1690 fs/hfsplus/extents.c:245
 __block_write_begin_int+0xa6b/0x2f80 fs/buffer.c:2105
 __block_write_begin fs/buffer.c:2154 [inline]
 block_write_begin+0x143/0x450 fs/buffer.c:2213
 cont_write_begin+0xcc0/0x1320 fs/buffer.c:2567
 hfsplus_write_begin+0x9a/0x140 fs/hfsplus/inode.c:47
 generic_perform_write+0x400/0xc60 mm/filemap.c:3930
 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4025
 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4051
 call_write_iter include/linux/fs.h:2108 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xb63/0x1520 fs/read_write.c:590
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xe0 fs/read_write.c:652
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3804 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 __do_kmalloc_node mm/slub.c:3965 [inline]
 __kmalloc+0x6e4/0x1000 mm/slub.c:3979
 kmalloc include/linux/slab.h:632 [inline]
 hfsplus_find_init+0x91/0x250 fs/hfsplus/bfind.c:21
 hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline]
 hfsplus_file_extend+0x6d8/0x1ba0 fs/hfsplus/extents.c:461
 hfsplus_get_block+0xe99/0x1690 fs/hfsplus/extents.c:245
 __block_write_begin_int+0xa6b/0x2f80 fs/buffer.c:2105
 __block_write_begin fs/buffer.c:2154 [inline]
 block_write_begin+0x143/0x450 fs/buffer.c:2213
 cont_write_begin+0xcc0/0x1320 fs/buffer.c:2567
 hfsplus_write_begin+0x9a/0x140 fs/hfsplus/inode.c:47
 generic_perform_write+0x400/0xc60 mm/filemap.c:3930
 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4025
 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4051
 call_write_iter include/linux/fs.h:2108 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xb63/0x1520 fs/read_write.c:590
 ksys_write+0x20f/0x4c0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x93/0xe0 fs/read_write.c:652
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

CPU: 0 PID: 5002 Comm: syz-executor225 Not tainted 6.8.0-syzkaller-08073-g480e035fc4c7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
=====================================================