Re: [PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Thomas Gleixner
On Tue, 16 Jan 2018, Andi Kleen wrote: > On Tue, Jan 16, 2018 at 10:24:53PM +0100, Thomas Gleixner wrote: > > On Tue, 16 Jan 2018, Andi Kleen wrote: > > > > > From: Andi Kleen > > > > > > Add a marker for retpoline to the module VERMAGIC. This catches > > > the case when

Re: [PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Thomas Gleixner
On Tue, 16 Jan 2018, Andi Kleen wrote: > On Tue, Jan 16, 2018 at 10:24:53PM +0100, Thomas Gleixner wrote: > > On Tue, 16 Jan 2018, Andi Kleen wrote: > > > > > From: Andi Kleen > > > > > > Add a marker for retpoline to the module VERMAGIC. This catches > > > the case when a non RETPOLINE

Re: [PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Greg KH
On Tue, Jan 16, 2018 at 12:52:28PM -0800, Andi Kleen wrote: > From: Andi Kleen > > Add a marker for retpoline to the module VERMAGIC. This catches > the case when a non RETPOLINE compiled module gets loaded into > a retpoline kernel, making it insecure. > > It doesn't

Re: [PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Greg KH
On Tue, Jan 16, 2018 at 12:52:28PM -0800, Andi Kleen wrote: > From: Andi Kleen > > Add a marker for retpoline to the module VERMAGIC. This catches > the case when a non RETPOLINE compiled module gets loaded into > a retpoline kernel, making it insecure. > > It doesn't handle the case when

Re: [PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Andi Kleen
On Tue, Jan 16, 2018 at 10:24:53PM +0100, Thomas Gleixner wrote: > On Tue, 16 Jan 2018, Andi Kleen wrote: > > > From: Andi Kleen > > > > Add a marker for retpoline to the module VERMAGIC. This catches > > the case when a non RETPOLINE compiled module gets loaded into > > a

Re: [PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Andi Kleen
On Tue, Jan 16, 2018 at 10:24:53PM +0100, Thomas Gleixner wrote: > On Tue, 16 Jan 2018, Andi Kleen wrote: > > > From: Andi Kleen > > > > Add a marker for retpoline to the module VERMAGIC. This catches > > the case when a non RETPOLINE compiled module gets loaded into > > a retpoline kernel,

Re: [PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Thomas Gleixner
On Tue, 16 Jan 2018, Andi Kleen wrote: > From: Andi Kleen > > Add a marker for retpoline to the module VERMAGIC. This catches > the case when a non RETPOLINE compiled module gets loaded into > a retpoline kernel, making it insecure. > > It doesn't handle the case when

Re: [PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Thomas Gleixner
On Tue, 16 Jan 2018, Andi Kleen wrote: > From: Andi Kleen > > Add a marker for retpoline to the module VERMAGIC. This catches > the case when a non RETPOLINE compiled module gets loaded into > a retpoline kernel, making it insecure. > > It doesn't handle the case when retpoline has been

[PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Andi Kleen
From: Andi Kleen Add a marker for retpoline to the module VERMAGIC. This catches the case when a non RETPOLINE compiled module gets loaded into a retpoline kernel, making it insecure. It doesn't handle the case when retpoline has been runtime disabled. Even in this case

[PATCH v3] retpoline: Add retpoline tag to VERMAGIC

2018-01-16 Thread Andi Kleen
From: Andi Kleen Add a marker for retpoline to the module VERMAGIC. This catches the case when a non RETPOLINE compiled module gets loaded into a retpoline kernel, making it insecure. It doesn't handle the case when retpoline has been runtime disabled. Even in this case the match of the