gnu: qemu: Add fixes for CVE-2015-5154 and CVE-2015-5158.

* gnu/packages/patches/qemu-CVE-2015-5154-pt1.patch,
  gnu/packages/patches/qemu-CVE-2015-5154-pt2.patch,
  gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch,
  gnu/packages/patches/qemu-CVE-2015-5158.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.
* gnu/packages/qemu.scm (qemu-headless)[source]: Add patches.

1 files changed, 71 insertions, 0 deletions

diff --git a/gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch b/gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch
new file mode 100644
index 0000000000..3ade9b1600
--- /dev/null
+++ b/gnu/packages/patches/qemu-CVE-2015-5154-pt3.patch
@@ -0,0 +1,71 @@
+From 1d3c2268f8708126a34064c2e0c1000b40e6f3e5 Mon Sep 17 00:00:00 2001
+From: Kevin Wolf <kwolf@redhat.com>
+Date: Wed, 3 Jun 2015 14:41:27 +0200
+Subject: [PATCH 3/3] ide: Clear DRQ after handling all expected accesses
+
+This is additional hardening against an end_transfer_func that fails to
+clear the DRQ status bit. The bit must be unset as soon as the PIO
+transfer has completed, so it's better to do this in a central place
+instead of duplicating the code in all commands (and forgetting it in
+some).
+
+Signed-off-by: Kevin Wolf <kwolf@redhat.com>
+---
+ hw/ide/core.c | 16 ++++++++++++----
+ 1 file changed, 12 insertions(+), 4 deletions(-)
+
+diff --git a/hw/ide/core.c b/hw/ide/core.c
+index 44fcc23..50449ca 100644
+--- a/hw/ide/core.c
++++ b/hw/ide/core.c
+@@ -2028,8 +2028,10 @@ void ide_data_writew(void *opaque, uint32_t addr, uint32_t val)
+     *(uint16_t *)p = le16_to_cpu(val);
+     p += 2;
+     s->data_ptr = p;
+-    if (p >= s->data_end)
++    if (p >= s->data_end) {
++        s->status &= ~DRQ_STAT;
+         s->end_transfer_func(s);
++    }
+ }
+
+ uint32_t ide_data_readw(void *opaque, uint32_t addr)
+@@ -2053,8 +2055,10 @@ uint32_t ide_data_readw(void *opaque, uint32_t addr)
+     ret = cpu_to_le16(*(uint16_t *)p);
+     p += 2;
+     s->data_ptr = p;
+-    if (p >= s->data_end)
++    if (p >= s->data_end) {
++        s->status &= ~DRQ_STAT;
+         s->end_transfer_func(s);
++    }
+     return ret;
+ }
+
+@@ -2078,8 +2082,10 @@ void ide_data_writel(void *opaque, uint32_t addr, uint32_t val)
+     *(uint32_t *)p = le32_to_cpu(val);
+     p += 4;
+     s->data_ptr = p;
+-    if (p >= s->data_end)
++    if (p >= s->data_end) {
++        s->status &= ~DRQ_STAT;
+         s->end_transfer_func(s);
++    }
+ }
+
+ uint32_t ide_data_readl(void *opaque, uint32_t addr)
+@@ -2103,8 +2109,10 @@ uint32_t ide_data_readl(void *opaque, uint32_t addr)
+     ret = cpu_to_le32(*(uint32_t *)p);
+     p += 4;
+     s->data_ptr = p;
+-    if (p >= s->data_end)
++    if (p >= s->data_end) {
++        s->status &= ~DRQ_STAT;
+         s->end_transfer_func(s);
++    }
+     return ret;
+ }
+
+--
+1.8.3.1
+