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From: bugzilla-daemon@bugzilla.kernel.org
To: linux-ide@vger.kernel.org
Subject: [Bug 49151] NULL pointer dereference in pata_acpi
Date: Sat,  3 Nov 2012 16:43:15 +0000 (UTC)	[thread overview]
Message-ID: <20121103164315.6894911FB85@bugzilla.kernel.org> (raw)
In-Reply-To: <bug-49151-11633@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=49151





--- Comment #36 from Alan <alan@lxorguk.ukuu.org.uk>  2012-11-03 16:43:14 ---
On Sat, 3 Nov 2012 05:26:35 +0100
Borislav Petkov <bp@alien8.de> wrote:

> On Wed, Oct 24, 2012 at 11:57:46AM +0100, Alan Cox wrote:
> > Which is an ATA layer bug - adev->dma_mode should never be called
> > without a DMA mode in normal use.
> 
> Ok, it looks like this would take a while to fix.

So a 30 second glance says that the problem is that you seem to have
dma_mode uninitialised as zero which is bogus.

That means either ata_acpi_gtm_xfermask broke (it should have set the
bits to 0xFF if no mode is found), ata_dma_enabled is broken, or
pacpi_qc_issue got called before pacpi_port_start (which seems wildly
unlikely)

Needs someone to go and dump the relevant values in the right places and
see what is breaking in the pata_acpi setup logic.

Alan

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  parent reply	other threads:[~2012-11-03 16:43 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-20 10:19 [Bug 49151] New: NULL pointer dereference in pata_acpi bugzilla-daemon
2012-10-20 10:31 ` [Bug 49151] " bugzilla-daemon
2012-10-20 10:33 ` bugzilla-daemon
2012-10-20 12:00 ` [Bug 49151] New: " Borislav Petkov
2012-10-21 16:04   ` Phillip Wood
2012-10-21 16:57     ` Borislav Petkov
2012-10-22 15:47       ` Phillip Wood
2012-10-22 20:27         ` Borislav Petkov
2012-10-23 10:05           ` Alan Cox
2012-10-23 10:17             ` Borislav Petkov
2012-10-23 16:12               ` Borislav Petkov
2012-10-24  6:43                 ` Anton V. Boyarshinov
2012-10-24  9:28               ` Phillip Wood
2012-10-24 10:57                 ` Alan Cox
2012-11-03  4:26                   ` Borislav Petkov
2012-11-03 16:30                     ` Alan Cox
2012-11-03 16:48                     ` Alan Cox
2012-11-16  4:50                       ` Jeff Garzik
2012-10-20 12:00 ` [Bug 49151] " bugzilla-daemon
2012-10-21 16:04 ` bugzilla-daemon
2012-10-21 16:58 ` bugzilla-daemon
2012-10-22 12:15 ` bugzilla-daemon
2012-10-22 12:21 ` bugzilla-daemon
2012-10-22 12:42 ` bugzilla-daemon
2012-10-22 15:48 ` bugzilla-daemon
2012-10-22 20:27 ` bugzilla-daemon
2012-10-22 20:40 ` bugzilla-daemon
2012-10-22 21:06 ` bugzilla-daemon
2012-10-23 10:01 ` bugzilla-daemon
2012-10-23 10:17 ` bugzilla-daemon
2012-10-23 11:02 ` bugzilla-daemon
2012-10-23 12:54 ` bugzilla-daemon
2012-10-23 16:12 ` bugzilla-daemon
2012-10-23 16:39 ` bugzilla-daemon
2012-10-23 20:11 ` bugzilla-daemon
2012-10-23 20:41 ` bugzilla-daemon
2012-10-23 20:52 ` bugzilla-daemon
2012-10-23 21:10 ` bugzilla-daemon
2012-10-24  6:43 ` bugzilla-daemon
2012-10-24  9:28 ` bugzilla-daemon
2012-10-24 10:52 ` bugzilla-daemon
2012-10-24 15:25 ` bugzilla-daemon
2012-10-25 14:31 ` bugzilla-daemon
2012-10-29 13:15 ` bugzilla-daemon
2012-10-29 13:36 ` bugzilla-daemon
2012-11-01 15:18 ` bugzilla-daemon
2012-11-02 12:07 ` bugzilla-daemon
2012-11-03  4:23 ` bugzilla-daemon
2012-11-03  4:26 ` bugzilla-daemon
2012-11-03  7:37 ` bugzilla-daemon
2012-11-03 16:25 ` bugzilla-daemon
2012-11-03 16:43 ` bugzilla-daemon [this message]
2012-11-15 18:05 ` bugzilla-daemon
2012-11-15 18:07 ` bugzilla-daemon
2012-11-16  4:50 ` bugzilla-daemon
2012-11-16  4:59 ` bugzilla-daemon
2012-11-16  8:39 ` bugzilla-daemon
2012-11-17 16:29 ` bugzilla-daemon
2012-11-17 17:22 ` bugzilla-daemon
2012-11-25 12:55 ` bugzilla-daemon
2012-11-29  2:22 ` bugzilla-daemon
2012-11-29 11:21 ` bugzilla-daemon
2012-11-30 17:10 ` bugzilla-daemon
2012-12-02 17:46 ` bugzilla-daemon
2012-12-03  0:51 ` bugzilla-daemon
2012-12-03  3:39 ` bugzilla-daemon
2012-12-07  7:00 ` bugzilla-daemon
2012-12-18  7:13 ` bugzilla-daemon
2012-12-18  7:26 ` bugzilla-daemon
2012-12-18 12:48 ` bugzilla-daemon

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