[Patch v6 3/6] hw/core/loader: add check for zero size in load_image_targphys_as

[Vishal Chourasia <vishalc@linux.ibm.com>]

Currently load_image_targphys_as() returns -1 on file open failure or
when max size is exceeded. Add an explicit check for zero-sized files
to catch this error early, since some callers check for size <= 0.

Signed-off-by: Vishal Chourasia <vishalc@linux.ibm.com>
---
 hw/core/loader.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/core/loader.c b/hw/core/loader.c
index 48dd4e7b33..6717324527 100644
--- a/hw/core/loader.c
+++ b/hw/core/loader.c
@@ -141,6 +141,11 @@ ssize_t load_image_targphys_as(const char *filename,
         return -1;
     }
 
+    if (size == 0) {
+        error_setg(errp, "empty file: %s", filename);
+        return -1;
+    }
+
     if (size > max_sz) {
         error_setg(errp, "%s exceeds maximum image size (%" PRIu64 " MiB)",
                    filename, max_sz / MiB);
-- 
2.51.0