linux-kernel - Re: [PATCH] net: socket: don't set sk_uid to garbage value in ->setattr()

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Date:   Sun, 01 Jan 2017 11:54:06 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     lorenzo@...gle.com
Cc:     ebiggers3@...il.com, netdev@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        ebiggers@...gle.com
Subject: Re: [PATCH] net: socket: don't set sk_uid to garbage value in
 ->setattr()

From: Lorenzo Colitti <lorenzo@...gle.com>
Date: Sun, 1 Jan 2017 16:57:23 +0900

> On Sat, Dec 31, 2016 at 8:42 AM, Eric Biggers <ebiggers3@...il.com> wrote:
>> ->setattr() was recently implemented for socket files to sync the socket
>> inode's uid to the new 'sk_uid' member of struct sock.  It does this by
>> copying over the ia_uid member of struct iattr.  However, ia_uid is
>> actually only valid when ATTR_UID is set in ia_valid, indicating that
>> the uid is being changed, e.g. by chown.
>> [...]
>> -       if (!err) {
>> +       if (!err && (iattr->ia_valid & ATTR_UID)) {
> 
> Oops. Thanks for fixing this. Unit tested in
> https://android-review.googlesource.com/316594 .
> 
> Tested-by: Lorenzo Colitti <lorenzo@...gle.com>
> Acked-by: Lorenzo Colitti <lorenzo@...gle.com>

Applied, thanks everyone.