File 0248-i386-kvmvapic-initialise-imm32-vari.patch of Package qemu.4227

Overview Repositories Revisions Requests Users Attributes Meta

File 0248-i386-kvmvapic-initialise-imm32-vari.patch of Package qemu.4227

From c059f2d857d6afa1685f236a12bc69fb6028ecfd Mon Sep 17 00:00:00 2001
From: Prasad J Pandit <pjp@fedoraproject.org>
Date: Thu, 7 Apr 2016 01:20:00 -0600
Subject: [PATCH] i386: kvmvapic: initialise imm32 variable

When processing Task Priorty Register(TPR) access, it could leak
automatic stack variable 'imm32' in patch_instruction().
Initialise the variable to avoid it.

Reported by: Donghai Zdh <donghai.zdh@alibaba-inc.com>

Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
[BR: BSC#975700 CVE-2016-4020]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/i386/kvmvapic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/i386/kvmvapic.c b/hw/i386/kvmvapic.c
index f97471f311..c32a8c41be 100644
--- a/hw/i386/kvmvapic.c
+++ b/hw/i386/kvmvapic.c
@@ -394,7 +394,7 @@ static void patch_instruction(VAPICROMState *s, X86CPU *cpu, target_ulong ip)
     CPUX86State *env = &cpu->env;
     VAPICHandlers *handlers;
     uint8_t opcode[2];
-    uint32_t imm32;
+    uint32_t imm32 = 0;
     target_ulong current_pc = 0;
     target_ulong current_cs_base = 0;
     int current_flags = 0;

Places

File 0248-i386-kvmvapic-initialise-imm32-vari.patch of Package qemu.4227

Places