imgdiff: fix file descriptor leak
mkstemp() allocates a file description that is never released. If
MakePatch() is called too many time, imgdiff reaches the Operating
System EMFILE (too many open files) limit.
Change-Id: Icbe1399f6f6d32cfa1830f879cacf7d75bbd9fc3
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Signed-off-by: Gaelle Nassiet <gaellex.nassiet@intel.com>
diff --git a/applypatch/imgdiff.cpp b/applypatch/imgdiff.cpp
index 4d83ffb..50cabbe 100644
--- a/applypatch/imgdiff.cpp
+++ b/applypatch/imgdiff.cpp
@@ -628,7 +628,15 @@
}
char ptemp[] = "/tmp/imgdiff-patch-XXXXXX";
- mkstemp(ptemp);
+ int fd = mkstemp(ptemp);
+
+ if (fd == -1) {
+ printf("MakePatch failed to create a temporary file: %s\n",
+ strerror(errno));
+ return NULL;
+ }
+ close(fd); // temporary file is created and we don't need its file
+ // descriptor
int r = bsdiff(src->data, src->len, &(src->I), tgt->data, tgt->len, ptemp);
if (r != 0) {