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authorOlof Johansson <olof@lixom.net>2006-08-18 21:44:57 +0200
committerAdrian Bunk <bunk@stusta.de>2006-08-18 21:44:57 +0200
commitd133b8ac886bf921a2a9efd871c3e71f1a5d6d80 (patch)
tree4a3eb8e7de54b82e4ac29fbae9f834cf9ff545cd
parentc1df7b7181ae16b4ec44a0b1e1bdf67f5a06f17e (diff)
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 <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Adrian Bunk <bunk@stusta.de>
-rw-r--r--arch/powerpc/kernel/cpu_setup_power4.S2
1 files changed, 2 insertions, 0 deletions
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