linux-kernel - Re: [PATCH][next] io_uring: ensure variable ret is initialized to zero

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Message-ID: <3aa821ea-3041-fb56-2458-ec643963c511@kernel.dk>
Date:   Thu, 26 Sep 2019 11:56:30 +0200
From:   Jens Axboe <axboe@...nel.dk>
To:     Colin King <colin.king@...onical.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] io_uring: ensure variable ret is initialized to
 zero

On 9/26/19 11:50 AM, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> In the case where sig is NULL the error variable ret is not initialized
> and may contain a garbage value on the final checks to see if ret is
> -ERESTARTSYS.  Best to initialize ret to zero before the do loop to
> ensure the ret does not accidentially contain -ERESTARTSYS before the
> loop.

Oops, weird it didn't complain. I've folded in this fix, as that commit
isn't upstream yet. Thanks!

-- 
Jens Axboe