From: James Courtier-Dutton <james.dutton@gmail.com>
To: "Ozan Çağlayan" <ozan@pardus.org.tr>
Cc: Takashi Iwai <tiwai@suse.de>, alsa-devel@alsa-project.org
Subject: Re: [BUG] NULL pointer dereference in patch_sigmatel.c
Date: Fri, 7 Aug 2009 10:43:07 +0100 [thread overview]
Message-ID: <ad2655cb0908070243h6318dbdep80d90a08fa6c435b@mail.gmail.com> (raw)
In-Reply-To: <4A7BF4F7.20405@pardus.org.tr>
2009/8/7 Ozan Çağlayan <ozan@pardus.org.tr>:
>
> Added the following lines:
>
> printk(KERN_INFO "0x%p\n", jack);
> printk(KERN_INFO "0x%p\n", jack->jack);
> printk(KERN_INFO "0x%p\n", jack->jack->private_data);
>
> dmesg:
>
> NVRM: loading NVIDIA UNIX x86 Kernel Module 180.51 Thu Apr 16 19:02:15
> PDT 2009
> ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 22 (level, low) -> IRQ 22
> PCI: Setting latency timer of device 0000:00:1b.0 to 64
> 0xf777a614
> 0x00000000
> BUG: unable to handle kernel NULL pointer dereference at 00000074
> IP: [<f93f2d97>] :snd_hda_codec_conexant:conexant_add_jack+0x57/0x81
> *pde = 00000000·
> Oops: 0000 [#1] SMP
>
Need more of the dmesg output.
I.e. to see which print statements succeeded.
Alternatively, attach the snd_hda.ko so one can see where in that file
offset 0x57 is.
But a more useful print would be:
if (!jack) printk(KERN_INFO "jack null\n");
else if (!(jack->jack)) printk(KERN_INFO "jack->jack null\n");
else if (!(jack->jack->private_data)) printk(KERN_INFO
"jack->jack->private_data null\n");
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next prev parent reply other threads:[~2009-08-07 9:43 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-16 19:51 [BUG] NULL pointer dereference in patch_sigmatel.c Ozan Çağlayan
2009-07-17 9:33 ` Takashi Iwai
2009-07-17 9:45 ` Takashi Iwai
2009-08-06 11:38 ` Ozan Çağlayan
2009-08-06 13:41 ` Ozan Çağlayan
2009-08-06 14:13 ` Takashi Iwai
2009-08-07 9:33 ` Ozan Çağlayan
2009-08-07 9:43 ` James Courtier-Dutton [this message]
2009-08-07 9:56 ` Takashi Iwai
2009-08-07 10:21 ` James Courtier-Dutton
2009-08-07 10:36 ` Ozan Çağlayan
2009-08-07 10:49 ` Takashi Iwai
2009-08-07 13:39 ` Ozan Çağlayan
2009-08-07 13:39 ` Takashi Iwai
2009-08-09 12:10 ` Ozan Çağlayan
2009-08-09 18:01 ` Takashi Iwai
2009-08-09 23:02 ` Ozan Çağlayan
2009-08-10 5:39 ` Takashi Iwai
2009-08-10 5:48 ` Takashi Iwai
2009-08-10 7:01 ` Ozan Çağlayan
2009-08-10 7:41 ` Takashi Iwai
2009-07-17 9:53 ` Ozan Çağlayan
2009-07-17 10:01 ` Takashi Iwai
2009-07-17 10:35 ` Ozan Çağlayan
2009-07-17 10:41 ` Takashi Iwai
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