linux-kernel - Re: todays git: WARNING: at drivers/ata/libata-sff.c:1017 ata_sff_hsm

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Message-ID: <20090110122130.318cf168@lxorguk.ukuu.org.uk>
Date:	Sat, 10 Jan 2009 12:21:30 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Sergei Shtylyov <sshtylyov@...mvista.com>
Cc:	Christian Borntraeger <borntraeger@...ibm.com>,
	linux-ide@...r.kernel.org, Jeff Garzik <jgarzik@...hat.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: todays git: WARNING: at drivers/ata/libata-sff.c:1017
 ata_sff_hsm_move+0x45e/0x750()

>    That's the typical REQUEST SENSE command with 18-byte data length.

Which means something has become horribly broken in the core libata stack.
An 18 byte inquiry would have 18 bytes as the *last* sg element. That
would therefore not trigger the WARN_ON. Someone has passed an sg list
that isn't properly terminated perhaps ?

I wonder if the pad code broke this.


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