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[Qemu-trivial] [PULL 20/20] ivshmem: check the value returned by fstat()


From: Michael Tokarev
Subject: [Qemu-trivial] [PULL 20/20] ivshmem: check the value returned by fstat()
Date: Fri, 15 Aug 2014 19:15:11 +0400

From: zhanghailiang <address@hidden>

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

Acked-by: Levente Kurusa <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Michael Tokarev <address@hidden>
---
 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 768e528..2be4b86 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,
-- 
1.7.10.4




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