linux-kernel - Re: [PATCH v2 -next] btrfs: Remove unnecessary casts in btrfs_read_root

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190220123338.GP17104@kadam>
Date:   Wed, 20 Feb 2019 15:33:38 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH v2 -next] btrfs: Remove unnecessary casts in
 btrfs_read_root_item

On Wed, Feb 20, 2019 at 12:32:02PM +0000, YueHaibing wrote:
> There is a messy cast here:
> 	min_t(int, len, (int)sizeof(*item)));
> 
> min_t() should normally cast to unsigned.  It's not possible for
> "len" to be negative, but if it were then we definitely
> wouldn't want to pass negatives to read_extent_buffer().  Also there
> is an extra cast.
> 
> This patch shouldn't affect runtime, it's just a clean up.
> 
> Suggested-by: Dan Carpenter <dan.carpenter@...cle.com>

It wasn't really suggested by me...  But I do think it's the right
thing.

Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>

regards,
dan carpenter