Re: Query regarding x86_64 purgatory and IA32-e compatibility mode

2012-10-26 Thread Vivek Goyal
On Thu, Oct 25, 2012 at 08:14:58PM -0700, Eric W. Biederman wrote: [..] I see that bit 21 in second doubleword is 0. IIUC, that means that we will switch to compatibility mode. If yes, we are still continuing to use 64bit instructions and continue to access registers (rip, r8-15) which

Re: Kdump with signed images

2012-10-26 Thread Vivek Goyal
On Fri, Oct 26, 2012 at 03:39:16AM +0100, Matthew Garrett wrote: On Thu, Oct 25, 2012 at 09:15:58PM -0400, Mimi Zohar wrote: On a running system, the package installer, after verifying the package integrity, would install each file with the associated 'security.ima' extended attribute.

Re: Kdump with signed images

2012-10-26 Thread Mimi Zohar
On Fri, 2012-10-26 at 03:39 +0100, Matthew Garrett wrote: On Thu, Oct 25, 2012 at 09:15:58PM -0400, Mimi Zohar wrote: On a running system, the package installer, after verifying the package integrity, would install each file with the associated 'security.ima' extended attribute. The

Re: Kdump with signed images

2012-10-26 Thread Mimi Zohar
On Fri, 2012-10-26 at 19:19 +0100, Matthew Garrett wrote: On Fri, Oct 26, 2012 at 01:59:34PM -0400, Mimi Zohar wrote: On Fri, 2012-10-26 at 03:39 +0100, Matthew Garrett wrote: and it must be impossible for anything other than /sbin/kexec to make the kexec system call. Permission is