Re: [PATCH] hfsplus: fix uninit-value in copy_name

[Kees Cook]

On Tue, 21 May 2024 13:21:46 +0800, Edward Adam Davis wrote:
> [syzbot reported]
> BUG: KMSAN: uninit-value in sized_strscpy+0xc4/0x160
>  sized_strscpy+0xc4/0x160
>  copy_name+0x2af/0x320 fs/hfsplus/xattr.c:411
>  hfsplus_listxattr+0x11e9/0x1a50 fs/hfsplus/xattr.c:750
>  vfs_listxattr fs/xattr.c:493 [inline]
>  listxattr+0x1f3/0x6b0 fs/xattr.c:840
>  path_listxattr fs/xattr.c:864 [inline]
>  __do_sys_listxattr fs/xattr.c:876 [inline]
>  __se_sys_listxattr fs/xattr.c:873 [inline]
>  __x64_sys_listxattr+0x16b/0x2f0 fs/xattr.c:873
>  x64_sys_call+0x2ba0/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:195
>  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
>  do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
>  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> 
> [...]

I've taken some security-related hfsplus stuff before, so:

Applied to for-next/hardening, thanks!

[1/1] hfsplus: fix uninit-value in copy_name
      https://git.kernel.org/kees/c/974a00974829

Take care,

-- 
Kees Cook