From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1D7EQn-0002fF-Rg for user-mode-linux-devel@lists.sourceforge.net; Fri, 04 Mar 2005 07:09:33 -0800 Received: from dgate2.fujitsu-siemens.com ([217.115.66.36]) by sc8-sf-mx2.sourceforge.net with esmtp (Exim 4.41) id 1D7EQj-0001y2-Kc for user-mode-linux-devel@lists.sourceforge.net; Fri, 04 Mar 2005 07:09:33 -0800 Message-ID: <422879DE.6050405@fujitsu-siemens.com> From: Bodo Stroesser MIME-Version: 1.0 Subject: Re: [uml-devel] 2.6.11 + uml.sf.net patches panic References: <42267C13.1060703@rimuhosting.com> <200503031853.j23IrNDS003496@ccure.user-mode-linux.org> <42286F4A.30506@fujitsu-siemens.com> In-Reply-To: <42286F4A.30506@fujitsu-siemens.com> Content-Type: multipart/mixed; boundary="------------070503090402040009030207" Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Fri, 04 Mar 2005 16:08:14 +0100 To: Bodo Stroesser Cc: user-mode-linux-devel@lists.sourceforge.net, Jeff Dike , Peter This is a multi-part message in MIME format. --------------070503090402040009030207 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Bodo Stroesser wrote: > Jeff Dike wrote: > >> The write_ldt just above the segfault in both stacks looks suspicious. > > > Yes. There seems to be a problem with this new stuff. > > Peter, could you please send a full call trace? I guess, the ones in your > mail are truncated, right? > > Bodo Meanwhile I found a problem in arch/um/sys-i386/ldt.c, which causes UML to panic, if LDT-entry number 8 is written, using modify_ldt-syscall. This crash is very similar to the one Peter had, so I hope the appended oneliner will solve the problem. Bodo --------------070503090402040009030207 Content-Type: text/x-diff; name="fix-skas-ldt.patch" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="fix-skas-ldt.patch" --- diff -puN arch/um/sys-i386/ldt.c~fix-skas-ldt arch/um/sys-i386/ldt.c --- linux-2.6.11-rc3-mm2/arch/um/sys-i386/ldt.c~fix-skas-ldt 2005-03-04 15:51:04.000000000 +0100 +++ linux-2.6.11-rc3-mm2-root/arch/um/sys-i386/ldt.c 2005-03-04 15:51:27.000000000 +0100 @@ -208,7 +208,7 @@ static int write_ldt(void __user * ptr, goto out_unlock; if(ldt_info.entry_number >= ldt->entry_count && - ldt_info.entry_number > LDT_DIRECT_ENTRIES){ + ldt_info.entry_number >= LDT_DIRECT_ENTRIES){ for(i=ldt->entry_count/LDT_ENTRIES_PER_PAGE; i*LDT_ENTRIES_PER_PAGE <= ldt_info.entry_number; i++){ _ --------------070503090402040009030207-- ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel