From: Jens Axboe <axboe@kernel.dk>
To: Colin King <colin.king@canonical.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH][next] io-wq: fix unintentional integer overflow on left shift
Date: Fri, 25 Oct 2019 06:54:55 -0600 [thread overview]
Message-ID: <fc23061e-31ec-8a66-2b62-771121d182de@kernel.dk> (raw)
In-Reply-To: <20191025124315.21742-1-colin.king@canonical.com>
On 10/25/19 6:43 AM, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Shifting the integer value 1U is evaluated with type unsigned int
> using 32-bit arithmetic and then used in an expression that expects
> a 64-bit value, so there is potentially an integer overflow. Fix this
> by using the BIT_ULL macro to perform the shift and avoid the overflow.
Good catch, that should indeed have been 1ULL. I'll fold in your
fix, thanks!
--
Jens Axboe
next prev parent reply other threads:[~2019-10-25 12:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-25 12:43 [PATCH][next] io-wq: fix unintentional integer overflow on left shift Colin King
2019-10-25 12:54 ` Jens Axboe [this message]
2019-10-25 13:56 ` Jens Axboe
2019-10-25 13:59 ` Colin Ian King
2019-10-25 13:59 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=fc23061e-31ec-8a66-2b62-771121d182de@kernel.dk \
--to=axboe@kernel.dk \
--cc=colin.king@canonical.com \
--cc=kernel-janitors@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).