rpms/qemu/F-11 qemu-fix-msr-count-potential-segfault.patch, NONE, 1.1 qemu.spec, 1.106, 1.107

[Mark McLoughlin]

Author: markmc

Update of /cvs/pkgs/rpms/qemu/F-11
In directory cvs1.fedora.phx.redhat.com:/tmp/cvs-serv11772

Modified Files:
	qemu.spec 
Added Files:
	qemu-fix-msr-count-potential-segfault.patch 
Log Message:
* Mon Oct 19 2009 Mark McLoughlin <markmc at redhat.com> - 2:0.10.6-8
- Fix potential segfault from too small MSR_COUNT (#528901)


qemu-fix-msr-count-potential-segfault.patch:
 qemu-kvm-x86.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- NEW FILE qemu-fix-msr-count-potential-segfault.patch ---
>From 3ea6ac6fde5cd46d5d8593a493a75eb29e2ccc9b Mon Sep 17 00:00:00 2001
From: Eduardo Habkost <ehabkost at redhat.com>
Date: Wed, 14 Oct 2009 15:02:27 -0300
Subject: [PATCH] fix MSR_COUNT for kvm_arch_save_regs()

A new register was added to the load/save list on commit
d283d5a65a2bdcc570065267be21848bd6fe3d78, but MSR_COUNT was not updated, leading
to potential stack corruption on kvm_arch_save_regs().

The following registers are saved by kvm_arch_save_regs():

 1) MSR_IA32_SYSENTER_CS
 2) MSR_IA32_SYSENTER_ESP
 3) MSR_IA32_SYSENTER_EIP
 4) MSR_STAR
 5) MSR_IA32_TSC
 6) MSR_VM_HSAVE_PA
 7) MSR_CSTAR (x86_64 only)
 8) MSR_KERNELGSBASE (x86_64 only)
 9) MSR_FMASK (x86_64 only)
10) MSR_LSTAR (x86_64 only)

(cherry picked from commit e7e5448ba387adc20be1cf08411a5b526d684299)

Signed-off-by: Eduardo Habkost <ehabkost at redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti at redhat.com>
Signed-off-by: Mark McLoughlin <markmc at redhat.com>
Fedora-patch: qemu-fix-msr-count-potential-segfault.patch
---
 qemu-kvm-x86.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/qemu-kvm-x86.c b/qemu-kvm-x86.c
index 8e0f0b2..89fe77c 100644
--- a/qemu-kvm-x86.c
+++ b/qemu-kvm-x86.c
@@ -116,9 +116,9 @@ static int get_msr_entry(struct kvm_msr_entry *entry, CPUState *env)
 }
 
 #ifdef TARGET_X86_64
-#define MSR_COUNT 9
+#define MSR_COUNT 10
 #else
-#define MSR_COUNT 5
+#define MSR_COUNT 6
 #endif
 
 static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs)
@@ -260,6 +260,7 @@ void kvm_arch_load_regs(CPUState *env)
 
     /* msrs */
     n = 0;
+    /* Remember to increase MSR_COUNT if you add new registers below */
     set_msr_entry(&msrs[n++], MSR_IA32_SYSENTER_CS,  env->sysenter_cs);
     set_msr_entry(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp);
     set_msr_entry(&msrs[n++], MSR_IA32_SYSENTER_EIP, env->sysenter_eip);
@@ -435,6 +436,7 @@ void kvm_arch_save_regs(CPUState *env)
 
     /* msrs */
     n = 0;
+    /* Remember to increase MSR_COUNT if you add new registers below */
     msrs[n++].index = MSR_IA32_SYSENTER_CS;
     msrs[n++].index = MSR_IA32_SYSENTER_ESP;
     msrs[n++].index = MSR_IA32_SYSENTER_EIP;
-- 
1.6.2.5



Index: qemu.spec
===================================================================
RCS file: /cvs/pkgs/rpms/qemu/F-11/qemu.spec,v
retrieving revision 1.106
retrieving revision 1.107
diff -u -p -r1.106 -r1.107
--- qemu.spec	5 Oct 2009 14:39:50 -0000	1.106
+++ qemu.spec	19 Oct 2009 10:33:43 -0000	1.107
@@ -1,7 +1,7 @@
 Summary: QEMU is a FAST! processor emulator
 Name: qemu
 Version: 0.10.6
-Release: 7%{?dist}
+Release: 8%{?dist}
 # Epoch because we pushed a qemu-1.0 package
 Epoch: 2
 License: GPLv2+ and LGPLv2+ and BSD
@@ -37,6 +37,7 @@ Patch16: qemu-ppc-on-ppc.patch
 Patch17: qemu-use-statfs-to-determine-huge-page-size.patch
 Patch18: qemu-allow-pulseaudio-to-be-the-default.patch
 Patch19: qemu-fix-virtio-net-gso-support.patch
+Patch20: qemu-fix-msr-count-potential-segfault.patch
 
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: SDL-devel zlib-devel which texi2html gnutls-devel cyrus-sasl-devel
@@ -243,6 +244,7 @@ such as kvmtrace and kvm_stat.
 %patch17 -p1
 %patch18 -p1
 %patch19 -p1
+%patch20 -p1
 
 %build
 # systems like rhel build system does not have a recent enough linker so
@@ -485,6 +487,9 @@ fi
 %{_mandir}/man1/qemu-img.1*
 
 %changelog
+* Mon Oct 19 2009 Mark McLoughlin <markmc at redhat.com> - 2:0.10.6-8
+- Fix potential segfault from too small MSR_COUNT (#528901)
+
 * Mon Oct  5 2009 Mark McLoughlin <markmc at redhat.com> - 2:0.10.6-7
 - Use rtl8029 PXE rom for ne2k_pci, not ne (#526243)
 - Also, replace the etherboot-zroms-kvm pkg requires with file-based requires