log-redirect: don't put enormous vars on the stack

Change-Id: I3e6df1c687d7d379f13078dbca7450cda34a97d5

diff --git a/src/log-redirect-stdout/main.c b/src/log-redirect-stdout/main.c
index d791e51..945398f 100644 (file)
--- a/src/log-redirect-stdout/main.c
+++ b/src/log-redirect-stdout/main.c
@@ -27,8 +27,10 @@
 #include <dlog-redirect-stdout.h>
 #include <logcommon.h>
 
-/* Tag length is limited by maximum request size. */
-#define MAX_TAG_LENGTH (MAX_LOGGER_REQUEST_LEN - sizeof(struct dlog_control_msg) - sizeof(struct dlog_control_msg_stdout))
+/* Tag length limited arbitrarily: in theory it can be as long
+ * as LOG_MAX_PAYLOAD_SIZE, but in practice it tends to be up to
+ * about 20ish and it would be good to keep it that way. */
+#define MAX_TAG_LENGTH 128
 
 struct parse_redirect_info {
        bool enabled;