linux-kernel - Re: [bug] ata subsystem related crash with latest -git

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>] [day] [month] [year] [list]

Date:	Thu, 18 Oct 2007 05:14:24 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Benny Halevy <bhalevy@...asas.com>
CC:	Jens Axboe <jens.axboe@...cle.com>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [bug] ata subsystem related crash with latest -git

Benny Halevy wrote:
> 
> 
> On 10/18/07, *Jeff Garzik* <jeff@...zik.org <mailto:jeff@...zik.org>> wrote:
> 
>     Jens Axboe wrote:
>      > index 4df8311..b858183 100644
>      > --- a/drivers/ata/sata_mv.c
>      > +++ b/drivers/ata/sata_mv.c
>      > @@ -1139,6 +1139,7 @@ static void mv_fill_sg(struct
>     ata_queued_cmd *qc)
>      >       struct mv_port_priv *pp = qc->ap->private_data;
>      >       struct scatterlist *sg;
>      >       struct mv_sg *mv_sg;
>      > +     int end_marked = 0;
>      >
>      >       mv_sg = pp->sg_tbl;
>      >       ata_for_each_sg(sg, qc) {
>      > @@ -1159,13 +1160,15 @@ static void mv_fill_sg(struct
>     ata_queued_cmd *qc)
>      >                       sg_len -= len;
>      >                       addr += len;
>      >
>      > -                     if (!sg_len && ata_sg_is_last(sg, qc))
>      > +                     if (!sg_len && ata_sg_is_last(sg, qc)) { 
> 
> 
> I'm not sure, but shouldn't that be || rather than &&?

sg_len is zero at the end of each scatterlist entry, so we need to test 
the additional ata_sg_is_last() condition to determine if we are really 
at the end of the PRD table.

	Jeff



-
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/