[Qemu-devel] [PATCH 4/4] ivshmem: check the value returned by fstat()

[zhanghailiang]

The function fstat() may fail, so check its return value.

Signed-off-by: zhanghailiang <address@hidden>
---
 hw/misc/ivshmem.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
index 768e528..2667e9f 100644
--- a/hw/misc/ivshmem.c
+++ b/hw/misc/ivshmem.c
@@ -324,7 +324,10 @@ static int check_shm_size(IVShmemState *s, int fd) {
 
     struct stat buf;
 
-    fstat(fd, &buf);
+    if (fstat(fd, &buf) < 0) {
+        fprintf(stderr, "Cannot stat IVSHMEM: %s\n", strerror(errno));
+        return -1;
+    }
 
     if (s->ivshmem_size > buf.st_size) {
         fprintf(stderr,
-- 
1.7.12.4