qemu: fix for CVE-2018-10839

Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2018-10839.patch b/meta/recipes-devtools/qemu/qemu/CVE-2018-10839.patch
new file mode 100644
index 0000000000..7e1e442a41
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2018-10839.patch
@@ -0,0 +1,52 @@
+From fdc89e90fac40c5ca2686733df17b6423fb8d8fb Mon Sep 17 00:00:00 2001
+From: Jason Wang <jasowang@redhat.com>
+Date: Wed, 30 May 2018 13:08:15 +0800
+Subject: [PATCH] ne2000: fix possible out of bound access in ne2000_receive
+
+In ne2000_receive(), we try to assign size_ to size which converts
+from size_t to integer. This will cause troubles when size_ is greater
+INT_MAX, this will lead a negative value in size and it can then pass
+the check of size < MIN_BUF_SIZE which may lead out of bound access of
+for both buf and buf1.
+
+Fixing by converting the type of size to size_t.
+
+CC: qemu-stable@nongnu.org
+Reported-by: Daniel Shapira <daniel@twistlock.com>
+Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
+Signed-off-by: Jason Wang <jasowang@redhat.com>
+
+Upstream-Status: Backport [https://git.qemu.org/?p=qemu.git;a=commitdiff
+;h=fdc89e90fac40c5ca2686733df17b6423fb8d8fb#patch1]
+
+CVE: CVE-2018-10839
+
+Signed-off-by: Changqing Li <changqing.li@windriver.com>
+---
+ hw/net/ne2000.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/hw/net/ne2000.c b/hw/net/ne2000.c
+index 07d79e3..869518e 100644
+--- a/hw/net/ne2000.c
++++ b/hw/net/ne2000.c
+@@ -174,7 +174,7 @@ static int ne2000_buffer_full(NE2000State *s)
+ ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
+ {
+     NE2000State *s = qemu_get_nic_opaque(nc);
+-    int size = size_;
++    size_t size = size_;
+     uint8_t *p;
+     unsigned int total_len, next, avail, len, index, mcast_idx;
+     uint8_t buf1[60];
+@@ -182,7 +182,7 @@ ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
+         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+ 
+ #if defined(DEBUG_NE2000)
+-    printf("NE2000: received len=%d\n", size);
++    printf("NE2000: received len=%zu\n", size);
+ #endif
+ 
+     if (s->cmd & E8390_STOP || ne2000_buffer_full(s))
+-- 
+1.8.3.1