| Message ID | 20221107033202.1375238-4-rmclure@linux.ibm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2,1/4] powerpc/64: Add INTERRUPT_SANITIZE_REGISTERS Kconfig | expand |
On Mon Nov 7, 2022 at 1:32 PM AEST, Rohan McLure wrote: > Cause pseries platforms to default to zeroising all potentially user-defined > registers when entering the kernel by means of any interrupt source, > reducing user-influence of the kernel and the likelihood or producing > speculation gadgets. For POWERNV as well? Thanks, Nick > > Signed-off-by: Rohan McLure <rmclure@linux.ibm.com> > --- > Resubmitting patches as their own series after v6 partially merged: > Link: https://lore.kernel.org/all/166488988686.779920.13794870102696416283.b4-ty@ellerman.id.au/t/ > --- > arch/powerpc/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index 9d3d20c6f365..2eb328b25e49 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -532,7 +532,7 @@ config HOTPLUG_CPU > config INTERRUPT_SANITIZE_REGISTERS > bool "Clear gprs on interrupt arrival" > depends on PPC64 && ARCH_HAS_SYSCALL_WRAPPER > - default PPC_BOOK3E_64 > + default PPC_BOOK3E_64 || PPC_PSERIES > help > Reduce the influence of user register state on interrupt handlers and > syscalls through clearing user state from registers before handling > -- > 2.34.1
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 9d3d20c6f365..2eb328b25e49 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -532,7 +532,7 @@ config HOTPLUG_CPU config INTERRUPT_SANITIZE_REGISTERS bool "Clear gprs on interrupt arrival" depends on PPC64 && ARCH_HAS_SYSCALL_WRAPPER - default PPC_BOOK3E_64 + default PPC_BOOK3E_64 || PPC_PSERIES help Reduce the influence of user register state on interrupt handlers and syscalls through clearing user state from registers before handling
Cause pseries platforms to default to zeroising all potentially user-defined registers when entering the kernel by means of any interrupt source, reducing user-influence of the kernel and the likelihood or producing speculation gadgets. Signed-off-by: Rohan McLure <rmclure@linux.ibm.com> --- Resubmitting patches as their own series after v6 partially merged: Link: https://lore.kernel.org/all/166488988686.779920.13794870102696416283.b4-ty@ellerman.id.au/t/ --- arch/powerpc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)