app-emulation/qemu: apply fix for CVE-2016-7170, bug #593284

Package-Manager: portage-2.2.28

diff --git a/app-emulation/qemu/files/qemu-2.7.0-CVE-2016-7170.patch b/app-emulation/qemu/files/qemu-2.7.0-CVE-2016-7170.patch
new file mode 100644 (file)
index 0000000..7eb5f76
--- /dev/null
+++ b/app-emulation/qemu/files/qemu-2.7.0-CVE-2016-7170.patch
@@ -0,0 +1,40 @@
+From: Prasad J Pandit <address@hidden>
+
+When processing svga command DEFINE_CURSOR in vmsvga_fifo_run,
+the computed BITMAP and PIXMAP size are checked against the
+'cursor.mask[]' and 'cursor.image[]' array sizes in bytes.
+Correct these checks to avoid OOB memory access.
+
+Reported-by: Qinghao Tang <address@hidden>
+Reported-by: Li Qiang <address@hidden>
+Signed-off-by: Prasad J Pandit <address@hidden>
+---
+ hw/display/vmware_vga.c | 12 +++++++-----
+ 1 file changed, 7 insertions(+), 5 deletions(-)
+
+diff --git a/hw/display/vmware_vga.c b/hw/display/vmware_vga.c
+index e51a05e..6599cf0 100644
+--- a/hw/display/vmware_vga.c
++++ b/hw/display/vmware_vga.c
+@@ -676,11 +676,13 @@ static void vmsvga_fifo_run(struct vmsvga_state_s *s)
+             cursor.bpp = vmsvga_fifo_read(s);
+ 
+             args = SVGA_BITMAP_SIZE(x, y) + SVGA_PIXMAP_SIZE(x, y, cursor.bpp);
+-            if (cursor.width > 256 ||
+-                cursor.height > 256 ||
+-                cursor.bpp > 32 ||
+-                SVGA_BITMAP_SIZE(x, y) > sizeof cursor.mask ||
+-                SVGA_PIXMAP_SIZE(x, y, cursor.bpp) > sizeof cursor.image) {
++            if (cursor.width > 256
++                || cursor.height > 256
++                || cursor.bpp > 32
++                || SVGA_BITMAP_SIZE(x, y)
++                    > sizeof(cursor.mask) / sizeof(cursor.mask[0])
++                || SVGA_PIXMAP_SIZE(x, y, cursor.bpp)
++                    > sizeof(cursor.image) / sizeof(cursor.image[0])) {
+                     goto badcmd;
+             }
+ 
+-- 
+2.5.5
+

diff --git a/app-emulation/qemu/qemu-2.7.0-r1.ebuild b/app-emulation/qemu/qemu-2.7.0-r2.ebuild
similarity index 99%
rename from app-emulation/qemu/qemu-2.7.0-r1.ebuild
rename to app-emulation/qemu/qemu-2.7.0-r2.ebuild
index c75b7b6bc05cca9c9a19b89c6e75df306ff307e0..42a669eb40a017eb9b51f05efbc76b0ea69447e4 100644 (file)
--- a/app-emulation/qemu/qemu-2.7.0-r1.ebuild
+++ b/app-emulation/qemu/qemu-2.7.0-r2.ebuild
@@ -340,6 +340,7 @@ src_prepare() {
        epatch "${FILESDIR}"/${P}-CVE-2016-7156.patch   # bug 593036
        epatch "${FILESDIR}"/${P}-CVE-2016-7157-1.patch # bug 593038
        epatch "${FILESDIR}"/${P}-CVE-2016-7157-2.patch # bug 593038
+       epatch "${FILESDIR}"/${P}-CVE-2016-7170.patch   # bug 593284
 
        # Fix ld and objcopy being called directly
        tc-export AR LD OBJCOPY