Re: 2.6.22-rc6-mm1 -- BUG - EIP: [<f8ac1350>] drm_vma_info+0x2a5/0x310 [drm] SS:ESP 0068:c80cde9c

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On Tue, 3 Jul 2007 15:59:08 -0700
"Miles Lane" <[email protected]> wrote:

> I ran the command:
>           find /proc | xargs grep a
> 
> BUG: unable to handle kernel NULL pointer dereference at virtual
> address 00000000
>  printing eip:
> f8ac1350
> *pde = 00000000
> Oops: 0000 [#1]
> SMP
> Modules linked in: arc4 ecb blkcipher cryptomgr crypto_algapi
> ieee80211_crypt_wep bluetooth i915 drm acpi_cpufreq
> cpufreq_conservative cpufreq_powersave cpufreq_performance ac battery
> video output button processor container firewire_sbp2 parport_pc lp
> parport pcmcia snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss
> snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss yenta_socket
> rsrc_nonstatic sdhci snd_seq_midi_event ipw2200 tifm_7xx1 mmc_core
> pcmcia_core ieee80211 ieee80211_crypt tifm_core snd_seq snd_timer
> snd_seq_device evdev shpchp snd iTCO_wdt iTCO_vendor_support
> pci_hotplug soundcore snd_page_alloc firewire_ohci firewire_core
> crc_itu_t 8139too ehci_hcd uhci_hcd usbcore fan
> CPU:    0
> EIP:    0060:[<f8ac1350>]    Not tainted VLI
> EFLAGS: 00010283   (2.6.22-rc6-mm1 #5)
> EIP is at drm_vma_info+0x2a5/0x310 [drm]
> eax: 00000000   ebx: c80cdf38   ecx: 00000000   edx: 00000000
> esi: 00008000   edi: c467e000   ebp: c80cdf0c   esp: c80cde9c
> ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
> Process grep (pid: 5172, ti=c80cd000 task=c7e9ed60 task.ti=c80cd000)
> Stack: c467e000 f8ac595a 00000000 f8000000 38000000 00000000 c0526e9c c80cdefc
>        c0165700 00000044 00000001 00000000 c7e9ed60 00000000 c467e000 c63b68e0
>        c1195548 00000000 00000035 c7e9f328 00000001 000800d0 00000000 00000000
> Call Trace:
>  [<c01b514d>] proc_file_read+0x108/0x222
>  [<c01b19ed>] proc_reg_read+0x63/0x76
>  [<c01834aa>] vfs_read+0xb0/0x139
>  [<c018390e>] sys_read+0x3d/0x72
>  [<c0108162>] sysenter_past_esp+0x6b/0xb5
>  [<ffffe410>] 0xffffe410
>  =======================
> INFO: lockdep is turned off.
> Code: 24 04 c9 59 ac f8 8b 45 c8 01 d8 89 04 24 e8 3c 66 74 c7 01 c3
> 89 5d d8 81 fb b0 0f 00 00 77 4a 8b 45 d4 8b 00 89 45 d4 8b 55 d4 <8b>
> 02 0f 18 00 90 8b 45 10 05 98 01 00 00 39 c2 0f 85 e7 fd ff
> EIP: [<f8ac1350>] drm_vma_info+0x2a5/0x310 [drm] SS:ESP 0068:c80cde9c

Dave, your code is being bad.
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