linux-kernel - Re: [PATCH 7/9] Guard bvec iteration logic v3

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: <20170406114655.GE9312@infradead.org>
Date:   Thu, 6 Apr 2017 04:46:55 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Dmitry Monakhov <dmonakhov@...nvz.org>
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        martin.petersen@...cle.com
Subject: Re: [PATCH 7/9] Guard bvec iteration logic v3

>  	if (bio_no_advance_iter(bio))
>  		iter->bi_size -= bytes;
> -	else
> -		bvec_iter_advance(bio->bi_io_vec, iter, bytes);
> +	else {
> +		int err;
> +		err = bvec_iter_advance(bio->bi_io_vec, iter, bytes);
> +		if (unlikely(err))
> +			bio->bi_error = err;
> +	}

I don't think that setting bi_error here is a good idea without actually
completing the bio, which would be a much bigger change.

Maybe leave the error ignored here for now with a fixme comment, and
then we can look into proper error handling in a separate series.