From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anca Emanuel Date: Wed, 23 Feb 2011 17:16:05 +0000 Subject: Re: Linux 2.6.38-rc6 Message-Id: List-Id: References: <20110222140349.GA20708@kryptos.osrc.amd.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Linus Torvalds Cc: Dave Airlie , linux-fbdev@vger.kernel.org, Ben Skeggs , dri-devel@lists.freedesktop.org, Borislav Petkov , Linux Kernel Mailing List On Wed, Feb 23, 2011 at 6:32 PM, Linus Torvalds wrote: > On Tue, Feb 22, 2011 at 9:42 PM, Anca Emanuel wr= ote: >> 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 > > =A01b: =A0 e8 f7 c0 29 00 =A0 =A0 =A0 =A0 =A0callq =A0xyz > =A020: =A0 48 8b 93 b8 03 00 00 =A0 =A0mov =A0 =A00x3b8(%rbx),%rdx > =A027:* =A048 8b 42 10 =A0 =A0 =A0 =A0 =A0 =A0 mov =A0 =A00x10(%rdx),%rax= =A0 =A0 <-- trapping instruction > > which corresponds to > > =A0 =A0 =A0 =A0mutex_lock(&info->lock); > =A0 =A0 =A0 =A0if (info->fbops->fb_release) > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0info->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). Anythin= g 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. > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Linus > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at =A0http://vger.kernel.org/majordomo-info.html > Please read the FAQ at =A0http://www.tux.org/lkml/ >