libpayload: cbfs: Fix minor memory leak in some edge cases

cbfs_get_handle() allocates memory for a handle and doesn't free it if
it errors out later, leaving the memory permanently leaked. Fix.

Change-Id: Ide198105ce3ad6237672ff152b4490c768909564
Reported-by: Coverity
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/16207
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/payloads/libpayload/libcbfs/cbfs_core.c b/payloads/libpayload/libcbfs/cbfs_core.c
index 7e660ce..91f2603 100644
--- a/payloads/libpayload/libcbfs/cbfs_core.c
+++ b/payloads/libpayload/libcbfs/cbfs_core.c
@@ -148,6 +148,7 @@
 
 	if (get_cbfs_range(&offset, &cbfs_end, media)) {
 		ERROR("Failed to find cbfs range\n");
+		free(handle);
 		return NULL;
 	}
 
@@ -155,6 +156,7 @@
 		media = &handle->media;
 		if (init_default_cbfs_media(media) != 0) {
 			ERROR("Failed to initialize default media.\n");
+			free(handle);
 			return NULL;
 		}
 	} else {
@@ -215,6 +217,7 @@
 	}
 	media->close(media);
 	LOG("WARNING: '%s' not found.\n", name);
+	free(handle);
 	return NULL;
 }