gnu: qemu: Fix CVE-2017-{13711,14167}.

* gnu/packages/patches/qemu-CVE-2017-14167.patch
gnu/packages/patches/qemu-CVE-2017-13711.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/virtualization.scm (qemu)[source]: Use them.

3 files changed, 160 insertions, 0 deletions

diff --git a/gnu/packages/patches/qemu-CVE-2017-13711.patch b/gnu/packages/patches/qemu-CVE-2017-13711.patch
new file mode 100644
index 0000000000..4070115419
--- /dev/null
+++ b/gnu/packages/patches/qemu-CVE-2017-13711.patch
@@ -0,0 +1,89 @@
+Fix CVE-2017-13711:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13711
+
+Patch copied from upstream source repository:
+
+https://git.qemu.org/?p=qemu.git;a=commitdiff;h=1201d308519f1e915866d7583d5136d03cc1d384
+
+From 1201d308519f1e915866d7583d5136d03cc1d384 Mon Sep 17 00:00:00 2001
+From: Samuel Thibault <samuel.thibault@ens-lyon.org>
+Date: Fri, 25 Aug 2017 01:35:53 +0200
+Subject: [PATCH] slirp: fix clearing ifq_so from pending packets
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+The if_fastq and if_batchq contain not only packets, but queues of packets
+for the same socket. When sofree frees a socket, it thus has to clear ifq_so
+from all the packets from the queues, not only the first.
+
+Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
+Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
+Cc: qemu-stable@nongnu.org
+Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
+---
+ slirp/socket.c | 39 +++++++++++++++++++++++----------------
+ 1 file changed, 23 insertions(+), 16 deletions(-)
+
+diff --git a/slirp/socket.c b/slirp/socket.c
+index ecec0295a9..cb7b5b608d 100644
+--- a/slirp/socket.c
++++ b/slirp/socket.c
+@@ -59,6 +59,27 @@ socreate(Slirp *slirp)
+   return(so);
+ }
+ 
++/*
++ * Remove references to so from the given message queue.
++ */
++static void
++soqfree(struct socket *so, struct quehead *qh)
++{
++    struct mbuf *ifq;
++
++    for (ifq = (struct mbuf *) qh->qh_link;
++             (struct quehead *) ifq != qh;
++             ifq = ifq->ifq_next) {
++        if (ifq->ifq_so == so) {
++            struct mbuf *ifm;
++            ifq->ifq_so = NULL;
++            for (ifm = ifq->ifs_next; ifm != ifq; ifm = ifm->ifs_next) {
++                ifm->ifq_so = NULL;
++            }
++        }
++    }
++}
++
+ /*
+  * remque and free a socket, clobber cache
+  */
+@@ -66,23 +87,9 @@ void
+ sofree(struct socket *so)
+ {
+   Slirp *slirp = so->slirp;
+-  struct mbuf *ifm;
+ 
+-  for (ifm = (struct mbuf *) slirp->if_fastq.qh_link;
+-       (struct quehead *) ifm != &slirp->if_fastq;
+-       ifm = ifm->ifq_next) {
+-    if (ifm->ifq_so == so) {
+-      ifm->ifq_so = NULL;
+-    }
+-  }
+-
+-  for (ifm = (struct mbuf *) slirp->if_batchq.qh_link;
+-       (struct quehead *) ifm != &slirp->if_batchq;
+-       ifm = ifm->ifq_next) {
+-    if (ifm->ifq_so == so) {
+-      ifm->ifq_so = NULL;
+-    }
+-  }
++  soqfree(so, &slirp->if_fastq);
++  soqfree(so, &slirp->if_batchq);
+ 
+   if (so->so_emu==EMU_RSH && so->extra) {
+ 	sofree(so->extra);
+-- 
+2.14.1
+
diff --git a/gnu/packages/patches/qemu-CVE-2017-14167.patch b/gnu/packages/patches/qemu-CVE-2017-14167.patch
new file mode 100644
index 0000000000..a6007ac082
--- /dev/null
+++ b/gnu/packages/patches/qemu-CVE-2017-14167.patch
@@ -0,0 +1,69 @@
+Fix CVE-2017-14167:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14167
+http://seclists.org/oss-sec/2017/q3/407
+
+Patch copied from upstream development mailing list:
+
+https://lists.nongnu.org/archive/html/qemu-devel/2017-09/msg01483.html
+
+From: Prasad J Pandit <address@hidden>
+
+While loading kernel via multiboot-v1 image, (flags & 0x00010000)
+indicates that multiboot header contains valid addresses to load
+the kernel image. These addresses are used to compute kernel
+size and kernel text offset in the OS image. Validate these
+address values to avoid an OOB access issue.
+
+This is CVE-2017-14167.
+
+Reported-by: Thomas Garnier <address@hidden>
+Signed-off-by: Prasad J Pandit <address@hidden>
+---
+ hw/i386/multiboot.c | 19 +++++++++++++++++++
+ 1 file changed, 19 insertions(+)
+
+Update: add CVE-ID to the commit message.
+
+diff --git a/hw/i386/multiboot.c b/hw/i386/multiboot.c
+index 6001f4caa2..c7b70c91d5 100644
+--- a/hw/i386/multiboot.c
++++ b/hw/i386/multiboot.c
+@@ -221,15 +221,34 @@ int load_multiboot(FWCfgState *fw_cfg,
+         uint32_t mh_header_addr = ldl_p(header+i+12);
+         uint32_t mh_load_end_addr = ldl_p(header+i+20);
+         uint32_t mh_bss_end_addr = ldl_p(header+i+24);
++
+         mh_load_addr = ldl_p(header+i+16);
++        if (mh_header_addr < mh_load_addr) {
++            fprintf(stderr, "invalid mh_load_addr address\n");
++            exit(1);
++        }
++
+         uint32_t mb_kernel_text_offset = i - (mh_header_addr - mh_load_addr);
+         uint32_t mb_load_size = 0;
+         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);
++            }
+             mb_load_size = mh_load_end_addr - mh_load_addr;
+         } else {
++            if (kernel_file_size < mb_kernel_text_offset) {
++                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;
+         }
+-- 
+2.13.5
+
diff --git a/gnu/packages/virtualization.scm b/gnu/packages/virtualization.scm
index 6cb4331b1f..8fd3230895 100644
--- a/gnu/packages/virtualization.scm
+++ b/gnu/packages/virtualization.scm
@@ -77,6 +77,8 @@
              (method url-fetch)
              (uri (string-append "https://download.qemu.org/qemu-"
                                  version ".tar.xz"))
+             (patches (search-patches "qemu-CVE-2017-13711.patch"
+                                      "qemu-CVE-2017-14167.patch"))
              (sha256
               (base32
                "0dgk7zcni41nf1jp84y0m6dk2nb4frnh571m8hkiv0m4hz4imn2m"))))