linux-kernel - Re: [PATCH 6/7] scsi: storvsc: Don't assume that the scatterlist is not chained

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: <20150324085607.GA1849@aepfle.de>
Date:	Tue, 24 Mar 2015 09:56:07 +0100
From:	Olaf Hering <olaf@...fle.de>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>
Cc:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, jbottomley@...allels.com,
	hch@...radead.org, linux-scsi@...r.kernel.org, apw@...onical.com,
	vkuznets@...hat.com, jasowang@...hat.com
Subject: Re: [PATCH 6/7] scsi: storvsc: Don't assume that the scatterlist is
 not chained

On Mon, Mar 23, K. Y. Srinivasan wrote:

> @@ -653,32 +640,39 @@ static unsigned int copy_from_bounce_buffer(struct scatterlist *orig_sgl,
>  	unsigned long bounce_addr = 0;
>  	unsigned long dest_addr = 0;
>  	unsigned long flags;
> +	struct scatterlist *cur_dest_sgl;
> +	struct scatterlist *cur_src_sgl;
>  
>  	local_irq_save(flags);
> -
> +	cur_dest_sgl = orig_sgl;
> +	cur_src_sgl = bounce_sgl;
>  	for (i = 0; i < orig_sgl_count; i++) {
> -		dest_addr = sg_kmap_atomic(orig_sgl,i) + orig_sgl[i].offset;
> +		dest_addr = (unsigned long)
> +				kmap_atomic(sg_page(cur_dest_sgl)) +
> +				cur_dest_sgl->offset;
>  		dest = dest_addr;
>  		destlen = orig_sgl[i].length;
> +		destlen = cur_dest_sgl->length;

Double assignment.

Olaf
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/