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gnu: qemu: Fix CVE-2018-7550. 

* gnu/packages/patches/qemu-CVE-2018-7550.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/virtualization.scm (qemu)[source]: Use it.
This commit is contained in:
Leo Famulari 2018-04-18 10:56:50 -04:00
parent 94b22905ab
commit e45f399bf9
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GPG Key ID: 2646FA30BACA7F08
3 changed files with 68 additions and 0 deletions
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1
gnu/local.mk
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@ -1061,6 +1061,7 @@ dist_patch_DATA = \
%D%/packages/patches/python-unittest2-python3-compat.patch \
%D%/packages/patches/python-unittest2-remove-argparse.patch \
%D%/packages/patches/python-waitress-fix-tests.patch \
%D%/packages/patches/qemu-CVE-2018-7550.patch \
%D%/packages/patches/qt4-ldflags.patch \
%D%/packages/patches/qtbase-use-TZDIR.patch \
%D%/packages/patches/qtscript-disable-tests.patch \

66
gnu/packages/patches/qemu-CVE-2018-7550.patch Normal file
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@ -0,0 +1,66 @@
Fix CVE-2018-7550:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7550
Patch copied from upstream source repository:
https://git.qemu.org/?p=qemu.git;a=patch;h=2a8fcd119eb7c6bb3837fc3669eb1b2dfb31daf8
From 2a8fcd119eb7c6bb3837fc3669eb1b2dfb31daf8 Mon Sep 17 00:00:00 2001
From: Jack Schwartz <jack.schwartz@oracle.com>
Date: Thu, 21 Dec 2017 09:25:15 -0800
Subject: [PATCH] multiboot: bss_end_addr can be zero
The multiboot spec (https://www.gnu.org/software/grub/manual/multiboot/),
section 3.1.3, allows for bss_end_addr to be zero.
A zero bss_end_addr signifies there is no .bss section.
Suggested-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Jack Schwartz <jack.schwartz@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
hw/i386/multiboot.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c
index 46d9c68bf5..bb8d8e4629 100644
--- a/hw/i386/multiboot.c
+++ b/hw/i386/multiboot.c
@@ -233,12 +233,6 @@ int load_multiboot(FWCfgState *fw_cfg,
mh_entry_addr = ldl_p(header+i+28);
if (mh_load_end_addr) {
- if (mh_bss_end_addr < mh_load_addr) {
- fprintf(stderr, "invalid mh_bss_end_addr address\n");
- exit(1);
- }
- mb_kernel_size = mh_bss_end_addr - mh_load_addr;
-
if (mh_load_end_addr < mh_load_addr) {
fprintf(stderr, "invalid mh_load_end_addr address\n");
exit(1);
@@ -249,8 +243,16 @@ int load_multiboot(FWCfgState *fw_cfg,
fprintf(stderr, "invalid kernel_file_size\n");
exit(1);
}
- mb_kernel_size = kernel_file_size - mb_kernel_text_offset;
- mb_load_size = mb_kernel_size;
+ mb_load_size = kernel_file_size - mb_kernel_text_offset;
+ }
+ if (mh_bss_end_addr) {
+ if (mh_bss_end_addr < (mh_load_addr + mb_load_size)) {
+ fprintf(stderr, "invalid mh_bss_end_addr address\n");
+ exit(1);
+ }
+ mb_kernel_size = mh_bss_end_addr - mh_load_addr;
+ } else {
+ mb_kernel_size = mb_load_size;
}
/* Valid if mh_flags sets MULTIBOOT_HEADER_HAS_VBE.
--
2.17.0

1
gnu/packages/virtualization.scm
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@ -88,6 +88,7 @@
(method url-fetch)
(uri (string-append "https://download.qemu.org/qemu-"
version ".tar.xz"))
(patches (search-patches "qemu-CVE-2018-7550.patch"))
(sha256
(base32
"11l6cs6mib16rgdrnqrhkqs033fjik316gkgfz3asbmxz38lalca"))))