linux-kernel - Re: [PATCH] hfsplus: fix uninit-value in copy

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Message-ID: <20240706-wucher-gegossen-ed347171f1f0@brauner>
Date: Sat, 6 Jul 2024 09:20:30 +0200
From: Christian Brauner <brauner@...nel.org>
To: Kees Cook <kees@...nel.org>
Cc: syzbot+efde959319469ff8d4d7@...kaller.appspotmail.com, 
	Edward Adam Davis <eadavis@...com>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [PATCH] hfsplus: fix uninit-value in copy_name

On Fri, Jul 05, 2024 at 02:20:54PM GMT, Kees Cook wrote:
> 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:

It's in #vfs.fixes to go out with the next vfs fixes pr.