linux-kernel - Re: [PATCH] fs/xattr.c: fix simple_xattr

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Message-ID: <20250611-gepunktet-umkurven-5482b6f39958@brauner>
Date: Wed, 11 Jun 2025 12:05:07 +0200
From: Christian Brauner <brauner@...nel.org>
To: Paul Moore <paul@...l-moore.com>
Cc: linux-fsdevel@...r.kernel.org, 
	Alexander Viro <viro@...iv.linux.org.uk>, Collin Funk <collin.funk1@...il.com>, 
	Stephen Smalley <stephen.smalley.work@...il.com>, linux-kernel@...r.kernel.org, selinux@...r.kernel.org, 
	eggert@...ucla.edu, bug-gnulib@....org
Subject: Re: [PATCH] fs/xattr.c: fix simple_xattr_list()

On Tue, Jun 10, 2025 at 07:50:10PM -0400, Paul Moore wrote:
> On Fri, Jun 6, 2025 at 1:39 AM Collin Funk <collin.funk1@...il.com> wrote:
> > Paul Moore <paul@...l-moore.com> writes:
> > >> <stephen.smalley.work@...il.com> wrote:
> > >> >
> > >> > commit 8b0ba61df5a1 ("fs/xattr.c: fix simple_xattr_list to always
> > >> > include security.* xattrs") failed to reset err after the call to
> > >> > security_inode_listsecurity(), which returns the length of the
> > >> > returned xattr name. This results in simple_xattr_list() incorrectly
> > >> > returning this length even if a POSIX acl is also set on the inode.
> > >> >
> > >> > Reported-by: Collin Funk <collin.funk1@...il.com>
> > >> > Closes: https://lore.kernel.org/selinux/8734ceal7q.fsf@gmail.com/
> > >> > Reported-by: Paul Eggert <eggert@...ucla.edu>
> > >> > Closes: https://bugzilla.redhat.com/show_bug.cgi?id=2369561
> > >> > Fixes: 8b0ba61df5a1 ("fs/xattr.c: fix simple_xattr_list to always include security.* xattrs")
> > >> >
> > >> > Signed-off-by: Stephen Smalley <stephen.smalley.work@...il.com>
> > >> > ---
> > >> >  fs/xattr.c | 1 +
> > >> >  1 file changed, 1 insertion(+)
> > >>
> > >> Reviewed-by: Paul Moore <paul@...l-moore.com>
> > >
> > > Resending this as it appears that Stephen's original posting had a
> > > typo in the VFS mailing list.  The original post can be found in the
> > > SELinux archives:
> > >
> > > https://lore.kernel.org/selinux/20250605164852.2016-1-stephen.smalley.work@gmail.com/
> >
> > Hi, responding to this message since it has the correct lists.
> >
> > I just booted into a kernel with this patch applied and confirm that it
> > fixes the Gnulib tests that were failing.
> >
> > Reviewed-by: Collin Funk <collin.funk1@...il.com>
> > Tested-by: Collin Funk <collin.funk1@...il.com>
> >
> > Thanks for the fix.
> 
> Al, Christian, are either of you going to pick up this fix to send to
> Linus?  If not, any objection if I send this up?

It's been in vfs.fixes for some time already and it'll go out with the
first round of post -rc1 fixes this week.