loop4: detected capacity change from 0 to 64
=====================================================
BUG: KMSAN: uninit-value in hfs_find_set_zero_bits+0xe0c/0x1050 fs/hfs/bitmap.c:45
 hfs_find_set_zero_bits+0xe0c/0x1050 fs/hfs/bitmap.c:45
 hfs_vbm_search_free+0x1d3/0x700 fs/hfs/bitmap.c:151
 hfs_extend_file+0x8cf/0x2200 fs/hfs/extent.c:408
 hfs_get_block+0x738/0x1620 fs/hfs/extent.c:353
 __block_write_begin_int+0x880/0x2ac0 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0x20c/0x530 fs/buffer.c:2102
 cont_write_begin+0xc95/0x1110 fs/buffer.c:2456
 hfs_write_begin+0x18b/0x270 fs/hfs/inode.c:58
 generic_perform_write+0x4b1/0xc30 mm/filemap.c:3772
 __generic_file_write_iter+0x3f1/0x9f0 mm/filemap.c:3900
 generic_file_write_iter+0x171/0x600 mm/filemap.c:3932
 call_write_iter include/linux/fs.h:2189 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0xc5c/0x1a60 fs/read_write.c:584
 ksys_write+0x28f/0x510 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __ia32_sys_write+0xdf/0x120 fs/read_write.c:646
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 slab_post_alloc_hook+0x271/0xf70 mm/slab.h:766
 slab_alloc_node mm/slub.c:3452 [inline]
 __kmem_cache_alloc_node+0x68c/0xac0 mm/slub.c:3491
 kmalloc_trace+0x98/0x260 mm/slab_common.c:1062
 kmalloc include/linux/slab.h:580 [inline]
 hfs_mdb_get+0x2059/0x3000 fs/hfs/mdb.c:175
 hfs_fill_super+0x1fb1/0x2790 fs/hfs/super.c:406
 mount_bdev+0x628/0x920 fs/super.c:1359
 hfs_mount+0xcd/0xe0 fs/hfs/super.c:456
 legacy_get_tree+0x167/0x2e0 fs/fs_context.c:610
 vfs_get_tree+0xdc/0x5d0 fs/super.c:1489
 do_new_mount+0x7a9/0x16f0 fs/namespace.c:3145
 path_mount+0xf98/0x26a0 fs/namespace.c:3475
 do_mount fs/namespace.c:3488 [inline]
 __do_sys_mount fs/namespace.c:3697 [inline]
 __se_sys_mount+0x919/0x9e0 fs/namespace.c:3674
 __ia32_sys_mount+0x15b/0x1b0 fs/namespace.c:3674
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 1 PID: 7700 Comm: syz-executor.4 Not tainted 6.2.0-rc8-syzkaller-80998-g9c866a280876 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
=====================================================