| Message ID | 20221129044354.1836018-7-rmclure@linux.ibm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v4,1/7] powerpc/64: Add INTERRUPT_SANITIZE_REGISTERS Kconfig | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/github-powerpc_ppctests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_selftests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_kernel_qemu | success | Successfully ran 24 jobs. |
| snowpatch_ozlabs/github-powerpc_clang | success | Successfully ran 6 jobs. |
| snowpatch_ozlabs/github-powerpc_sparse | success | Successfully ran 4 jobs. |
On Tue Nov 29, 2022 at 2:43 PM AEST, Rohan McLure wrote: > Cause pseries and POWERNV 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> Acked-by: Nicholas Piggin <npiggin@gmail.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/ > v4: Default on POWERNV as well. > --- > arch/powerpc/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index 280c797e0f30..2ab114a02f62 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -534,7 +534,7 @@ 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 || PPC_POWERNV > help > Reduce the influence of user register state on interrupt handlers and > syscalls through clearing user state from registers before handling > -- > 2.37.2
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 280c797e0f30..2ab114a02f62 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -534,7 +534,7 @@ 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 || PPC_POWERNV help Reduce the influence of user register state on interrupt handlers and syscalls through clearing user state from registers before handling
Cause pseries and POWERNV 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/ v4: Default on POWERNV as well. --- arch/powerpc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)