guix/gnu/packages/patches/qemu-CVE-2016-8577.patch

Subject: [Qemu-devel] [PATCH] 9pfs: fix potential host memory leak in v9fs_read
From: Li Qiang <liq3ea@gmail.com>

In 9pfs read dispatch function, it doesn't free two QEMUIOVector
object thus causing potential memory leak. This patch avoid this.

Signed-off-by: Li Qiang <liq3ea@gmail.com>
---
 hw/9pfs/9p.c | 5 +++--
  1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/hw/9pfs/9p.c b/hw/9pfs/9p.c
index 119ee58..543a791 100644
--- a/hw/9pfs/9p.c
+++ b/hw/9pfs/9p.c
@@ -1826,14 +1826,15 @@ static void v9fs_read(void *opaque)
             if (len < 0) {
                 /* IO error return the error */
                 err = len;
-                goto out;
+                goto out_free_iovec;
             }
         } while (count < max_count && len > 0);
         err = pdu_marshal(pdu, offset, "d", count);
         if (err < 0) {
-            goto out;
+            goto out_free_iovec;
         }
         err += offset + count;
+out_free_iovec:
         qemu_iovec_destroy(&qiov);
         qemu_iovec_destroy(&qiov_full);
     } else if (fidp->fid_type == P9_FID_XATTR) {
-- 
1.8.3.1