From d133b8ac886bf921a2a9efd871c3e71f1a5d6d80 Mon Sep 17 00:00:00 2001 From: Olof Johansson Date: Fri, 18 Aug 2006 21:44:57 +0200 Subject: [PATCH] powerpc: Clear HID0 attention enable on PPC970 at boot time (CVE-2006-4093) Clear HID0[en_attn] at CPU init time on PPC970. Closes CVE-2006-4093. Signed-off-by: Olof Johansson Signed-off-by: Paul Mackerras Signed-off-by: Adrian Bunk --- arch/powerpc/kernel/cpu_setup_power4.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/kernel/cpu_setup_power4.S b/arch/powerpc/kernel/cpu_setup_power4.S index b61d86e7ceb6..55f367eddb69 100644 --- a/arch/powerpc/kernel/cpu_setup_power4.S +++ b/arch/powerpc/kernel/cpu_setup_power4.S @@ -94,6 +94,8 @@ _GLOBAL(__setup_cpu_ppc970) mfspr r0,SPRN_HID0 li r11,5 /* clear DOZE and SLEEP */ rldimi r0,r11,52,8 /* set NAP and DPM */ + li r11,0 + rldimi r0,r11,32,31 /* clear EN_ATTN */ mtspr SPRN_HID0,r0 mfspr r0,SPRN_HID0 mfspr r0,SPRN_HID0 -- 2.39.5