Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

On 2015-11-05 00:13, Boris Ostrovsky wrote: On 11/04/2015 03:02 PM, Sander Eikelenboom wrote: On 2015-11-04 19:47, Stephen Smalley wrote: On 11/04/2015 01:28 PM, Sander Eikelenboom wrote: On 2015-11-04 16:52, Stephen Smalley wrote: On 11/04/2015 06:55 AM, Sander Eikelenboom wrote: Hi All,

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

Thursday, November 5, 2015, 2:53:40 PM, you wrote: > On 11/05/2015 04:13 AM, Sander Eikelenboom wrote: >> >> It makes "cat /sys/kernel/debug/kernel_page_tables" work and >> prevents a kernel with CONFIG_DEBUG_WX=y from crashing at boot. > Great. Our nightly runs also failed spectacularly due to

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

On 11/05/2015 04:13 AM, Sander Eikelenboom wrote: It makes "cat /sys/kernel/debug/kernel_page_tables" work and prevents a kernel with CONFIG_DEBUG_WX=y from crashing at boot. Great. Our nightly runs also failed spectacularly due to this bug. It now does give a warning about an insecure W+X

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

On 11/04/2015 03:02 PM, Sander Eikelenboom wrote: On 2015-11-04 19:47, Stephen Smalley wrote: On 11/04/2015 01:28 PM, Sander Eikelenboom wrote: On 2015-11-04 16:52, Stephen Smalley wrote: On 11/04/2015 06:55 AM, Sander Eikelenboom wrote: Hi All, I just tried to boot with the current linus

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

On 2015-11-04 19:47, Stephen Smalley wrote: On 11/04/2015 01:28 PM, Sander Eikelenboom wrote: On 2015-11-04 16:52, Stephen Smalley wrote: On 11/04/2015 06:55 AM, Sander Eikelenboom wrote: Hi All, I just tried to boot with the current linus mergewindow tree under Xen. It fails with a kernel

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

On 11/04/2015 01:47 PM, Stephen Smalley wrote: On 11/04/2015 01:28 PM, Sander Eikelenboom wrote: On 2015-11-04 16:52, Stephen Smalley wrote: On 11/04/2015 06:55 AM, Sander Eikelenboom wrote: Hi All, I just tried to boot with the current linus mergewindow tree under Xen. It fails with a

[Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

Hi All, I just tried to boot with the current linus mergewindow tree under Xen. It fails with a kernel panic at boot with the new "CONFIG_DEBUG_WX" option enabled. Disabling it makes the kernel boot fine. The splat: [ 18.424241] Freeing unused kernel memory: 1104K (822fc000 -

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

On 11/04/2015 06:55 AM, Sander Eikelenboom wrote: Hi All, I just tried to boot with the current linus mergewindow tree under Xen. It fails with a kernel panic at boot with the new "CONFIG_DEBUG_WX" option enabled. Disabling it makes the kernel boot fine. The splat: [ 18.424241] Freeing

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

On 2015-11-04 19:06, Ingo Molnar wrote: * Stephen Smalley wrote: On 11/04/2015 06:55 AM, Sander Eikelenboom wrote: >Hi All, > >I just tried to boot with the current linus mergewindow tree under Xen. >It fails with a kernel panic at boot with the new "CONFIG_DEBUG_WX"

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

On 11/04/2015 01:28 PM, Sander Eikelenboom wrote: On 2015-11-04 16:52, Stephen Smalley wrote: On 11/04/2015 06:55 AM, Sander Eikelenboom wrote: Hi All, I just tried to boot with the current linus mergewindow tree under Xen. It fails with a kernel panic at boot with the new "CONFIG_DEBUG_WX"

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

* Stephen Smalley wrote: > On 11/04/2015 06:55 AM, Sander Eikelenboom wrote: > >Hi All, > > > >I just tried to boot with the current linus mergewindow tree under Xen. > >It fails with a kernel panic at boot with the new "CONFIG_DEBUG_WX" > >option enabled. > >Disabling it

Re: [Xen-devel] Linux 4.4 MW: Boot under Xen fails with CONFIG_DEBUG_WX enabled: RIP: ptdump_walk_pgd_level_core

On 2015-11-04 16:52, Stephen Smalley wrote: On 11/04/2015 06:55 AM, Sander Eikelenboom wrote: Hi All, I just tried to boot with the current linus mergewindow tree under Xen. It fails with a kernel panic at boot with the new "CONFIG_DEBUG_WX" option enabled. Disabling it makes the kernel boot