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From edb9059eb8f42f892d67df324eeb0098c05d1f4a Mon Sep 17 00:00:00 2001
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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Tue, 28 Feb 2017 12:07:54 +0100
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Subject: [PATCH 09/24] i386: kvmvapic: initialise imm32 variable
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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Message-id: <20170228120754.16073-1-pbonzini@redhat.com>
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Patchwork-id: 74089
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O-Subject: [RHEL7.4 qemu-kvm PATCH] i386: kvmvapic: initialise imm32 variable
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Bugzilla: 1335751
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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When processing Task Priorty Register(TPR) access, it could leak
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automatic stack variable 'imm32' in patch_instruction().
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Initialise the variable to avoid it.
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Reported by: Donghai Zdh <donghai.zdh@alibaba-inc.com>
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Cc: qemu-stable@nongnu.org
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Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
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Message-Id: <1460013608-16670-1-git-send-email-ppandit@redhat.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 691a02e2ce0c413236a78dee6f2651c937b09fb0)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/i386/kvmvapic.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/hw/i386/kvmvapic.c b/hw/i386/kvmvapic.c
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index 577ae64..a5dd9dd 100644
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--- a/hw/i386/kvmvapic.c
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+++ b/hw/i386/kvmvapic.c
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@@ -390,7 +390,7 @@ static void patch_instruction(VAPICROMState *s, X86CPU *cpu, target_ulong ip)
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CPUX86State *env = &cpu->env;
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VAPICHandlers *handlers;
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uint8_t opcode[2];
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- uint32_t imm32;
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+ uint32_t imm32 = 0;
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target_ulong current_pc = 0;
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target_ulong current_cs_base = 0;
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int current_flags = 0;
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--
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1.8.3.1
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