linux-kernel - Re: 2.6.24-rc1-54866f032307063776b4eff7eadb131d47f9f9b4 fails to boot: kernel BUG at include/linux/scatterlist.h:49!

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]

Date:	Sun, 4 Nov 2007 09:44:56 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
Cc:	Torsten Kaiser <just.for.lkml@...glemail.com>,
	linux-kernel@...r.kernel.org, linux1394-devel@...ts.sourceforge.net
Subject: Re: 2.6.24-rc1-54866f032307063776b4eff7eadb131d47f9f9b4 fails to  boot: kernel BUG at include/linux/scatterlist.h:49!

On Sat, Nov 03 2007, Jens Axboe wrote:
> On Sat, Nov 03 2007, Stefan Richter wrote:
> > Torsten Kaiser wrote:
> > > On 11/2/07, Stefan Richter <stefanr@...6.in-berlin.de> wrote:
> > >> To which extent do you need IEEE 1394 drivers?
> > > 
> > > Using eth1394 as primary network connection on this computer.
> > > So switching to the new stack is currently not an option,
> > 
> > That's right.
> > 
> > > Looking that calltrace upwards, it seems replacing the
> > > memset(dma->sglist,...) with sg_init_table(...) would fix the BUG_ON()
> > > as that inits the SG_MAGIC.
> > 
> > Yes, this should be the first thing to be fixed.
> 
> It's probably enough. Only if you use chaining do you need to convert to
> using for_each_sg() and so on.

Did a grep over ieee1394/, this seems to be all you need.

diff --git a/drivers/ieee1394/dma.c b/drivers/ieee1394/dma.c
index f5f4983..7c4eb39 100644
--- a/drivers/ieee1394/dma.c
+++ b/drivers/ieee1394/dma.c
@@ -103,8 +103,7 @@ int dma_region_alloc(struct dma_region *dma, unsigned long n_bytes,
 		goto err;
 	}
 
-	/* just to be safe - this will become unnecessary once sglist->address goes away */
-	memset(dma->sglist, 0, dma->n_pages * sizeof(*dma->sglist));
+	sg_init_table(dma->sglist, dma->n_pages);
 
 	/* fill scatter/gather list with pages */
 	for (i = 0; i < dma->n_pages; i++) {

-- 
Jens Axboe

-
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/