File 0139-ivshmem-check-the-value-returned-by.patch of Package qemu.313

From 8b6b52f6e53903560a61495126294e4ad55db6c3 Mon Sep 17 00:00:00 2001
From: zhanghailiang <zhang.zhanghailiang@huawei.com>
Date: Thu, 14 Aug 2014 15:29:15 +0800
Subject: [PATCH] ivshmem: check the value returned by fstat()
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The function fstat() may fail, so check its return value.

Acked-by: Levente Kurusa <lkurusa@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(cherry picked from commit 5edbdbcdf882e4220adc7dbf433351077cd1fbbc)
[AF: FATE#314468]
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 hw/misc/ivshmem.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index 8d144ba..683e2c0 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -324,7 +324,11 @@ static int check_shm_size(IVShmemState *s, int fd) {
 
     struct stat buf;
 
-    fstat(fd, &buf);
+    if (fstat(fd, &buf) < 0) {
+        fprintf(stderr, "ivshmem: exiting: fstat on fd %d failed: %s\n",
+                fd, strerror(errno));
+        return -1;
+    }
 
     if (s->ivshmem_size > buf.st_size) {
         fprintf(stderr,