From: Prasad J Pandit <pjp@fedoraproject.org>
Date: Thu, 7 Apr 2016 07:20:08 +0000 (+0530)
Subject: i386: kvmvapic: initialise imm32 variable
X-Git-Tag: v2.6.1~78
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d00ba3fa9b58b3128edef8e4ed840921e29dcd88;p=thirdparty%2Fqemu.git

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>
Cc: qemu-stable@nongnu.org
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <1460013608-16670-1-git-send-email-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

(cherry picked from commit 691a02e2ce0c413236a78dee6f2651c937b09fb0)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---

diff --git a/hw/i386/kvmvapic.c b/hw/i386/kvmvapic.c
index c69f3740494..ff1e31a4d26 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;