1 files changed, 50 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2018-18954.patch b/meta/recipes-devtools/qemu/qemu/CVE-2018-18954.patch
new file mode 100644
index 0000000000..9fe136455f
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2018-18954.patch
@@ -0,0 +1,50 @@
+From 3c9fd43da473a324f6cc7a0d3db58f651a2d262c Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <pjp@fedoraproject.org>
+Date: Fri, 26 Oct 2018 18:03:58 +0530
+Subject: [PATCH] ppc/pnv: check size before data buffer access
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+While performing PowerNV memory r/w operations, the access length
+'sz' could exceed the data[4] buffer size. Add check to avoid OOB
+access.
+
+Reported-by: Moguofang <moguofang@huawei.com>
+Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
+Reviewed-by: Cédric Le Goater <clg@kaod.org>
+Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
+
+CVE: CVE-2018-18954
+Upstream-Status: Backport
+[https://git.qemu.org/?p=qemu.git;a=commit;h=d07945e78eb6b593cd17a4640c1fc9eb35e3245d]
+
+Signed-off-by: Dan Tran <dantran@microsoft.com>
+---
+ hw/ppc/pnv_lpc.c | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/hw/ppc/pnv_lpc.c b/hw/ppc/pnv_lpc.c
+index d7721320a2..172a915cfc 100644
+--- a/hw/ppc/pnv_lpc.c
++++ b/hw/ppc/pnv_lpc.c
+@@ -155,9 +155,15 @@ static void pnv_lpc_do_eccb(PnvLpcController *lpc, uint64_t cmd)
+     /* XXX Check for magic bits at the top, addr size etc... */
+     unsigned int sz = (cmd & ECCB_CTL_SZ_MASK) >> ECCB_CTL_SZ_LSH;
+     uint32_t opb_addr = cmd & ECCB_CTL_ADDR_MASK;
+-    uint8_t data[4];
++    uint8_t data[8];
+     bool success;
+ 
++    if (sz > sizeof(data)) {
++        qemu_log_mask(LOG_GUEST_ERROR,
++            "ECCB: invalid operation at @0x%08x size %d\n", opb_addr, sz);
++        return;
++    }
++
+     if (cmd & ECCB_CTL_READ) {
+         success = opb_read(lpc, opb_addr, data, sz);
+         if (success) {
+-- 
+2.22.0.vfs.1.1.57.gbaf16c8
+