Hi!
On Thu, Feb 24, 2022 at 09:29:55AM +0100, Gabriel Paubert wrote:
> On Wed, Feb 23, 2022 at 05:27:39PM -0600, Segher Boessenkool wrote:
> > On Wed, Feb 23, 2022 at 09:48:09PM +0100, Gabriel Paubert wrote:
> > > On Wed, Feb 23, 2022 at 06:11:36PM +0100, Christophe Leroy wrote:
> > > > +
On Wed, Feb 23, 2022 at 09:48:09PM +0100, Gabriel Paubert wrote:
> On Wed, Feb 23, 2022 at 06:11:36PM +0100, Christophe Leroy wrote:
> > + /* Zero volatile regs that may contain sensitive kernel data */
> > + li r0,0
> > + li r4,0
> > + li r5,0
> > + li r6,0
> > +
Le 23/02/2022 à 20:34, Kees Cook a écrit :
> On Wed, Feb 23, 2022 at 06:11:36PM +0100, Christophe Leroy wrote:
>> Commit a82adfd5c7cb ("hardening: Introduce CONFIG_ZERO_CALL_USED_REGS")
>> added zeroing of used registers at function exit.
>>
>> At the time being, PPC64 clears volatile registers
On Wed, Feb 23, 2022 at 05:27:39PM -0600, Segher Boessenkool wrote:
> On Wed, Feb 23, 2022 at 09:48:09PM +0100, Gabriel Paubert wrote:
> > On Wed, Feb 23, 2022 at 06:11:36PM +0100, Christophe Leroy wrote:
> > > + /* Zero volatile regs that may contain sensitive kernel data */
> > > + li r0,0
Le 23/02/2022 à 21:48, Gabriel Paubert a écrit :
> On Wed, Feb 23, 2022 at 06:11:36PM +0100, Christophe Leroy wrote:
>> Commit a82adfd5c7cb ("hardening: Introduce CONFIG_ZERO_CALL_USED_REGS")
>> added zeroing of used registers at function exit.
>>
>> At the time being, PPC64 clears volatile
On Wed, Feb 23, 2022 at 06:11:36PM +0100, Christophe Leroy wrote:
> Commit a82adfd5c7cb ("hardening: Introduce CONFIG_ZERO_CALL_USED_REGS")
> added zeroing of used registers at function exit.
>
> At the time being, PPC64 clears volatile registers on syscall exit but
> PPC32 doesn't do it for
On Wed, Feb 23, 2022 at 06:11:36PM +0100, Christophe Leroy wrote:
> Commit a82adfd5c7cb ("hardening: Introduce CONFIG_ZERO_CALL_USED_REGS")
> added zeroing of used registers at function exit.
>
> At the time being, PPC64 clears volatile registers on syscall exit but
> PPC32 doesn't do it for
