On Wed, Feb 23, 2011 at 6:32 PM, Linus Torvalds torvalds@linux-foundation.org wrote:
On Tue, Feb 22, 2011 at 9:42 PM, Anca Emanuel anca.emanuel@gmail.com wrote:
General protection fault: http://i.imgur.com/TBJ6y.jpg
dmesg: http://pastebin.com/qD8pR8QH config: http://pastebin.com/XEurtHWi
That's drivers/video/fbmem.c: fb_release(), and the "Code:" disassembly shows that it is
1b: e8 f7 c0 29 00 callq xyz 20: 48 8b 93 b8 03 00 00 mov 0x3b8(%rbx),%rdx 27:* 48 8b 42 10 mov 0x10(%rdx),%rax <-- trapping instruction
which corresponds to
mutex_lock(&info->lock); if (info->fbops->fb_release) info->fbops->fb_release(info,1);
so it looks like 'info->fbops' is invalid. It's in %rdx, and is 0x00d000ae00b500c2, which is definitely not a valid pointer. Looks like some bad corruption (looks like a sequence of 16-bit numbers, but it could be anything).
Looks like nouveafb took over from vesafb. Did you do anything special to trigger this?
No. Just boot the system.
Also, you do seem to have some extra patches (yama at the least). Anything else?
I used git clone, nothing else. First time 2.6.38-rc6 was working. After an update from ubuntu I get that error at boot.
The dmesg is from Ubuntu 11.04 with their kernel and is working fine.
Linus
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