From: Omar Polo <op@omarpolo.com>
Subject: Re: gotwebd: fix null-deref and ENOMEM question
To: Tracey Emery <tracey@traceyemery.net>
Cc: gameoftrees@openbsd.org
Date: Thu, 25 Aug 2022 17:41:46 +0200

I'm still seeing gotwebd increasing its memory usage over time so I'm
still searching for leaks.

I've seen that we miss two free on the string returned by
gotweb_get_time_str, and while here I'm also dropping a redundant
ternary operator (age cannot be NULL if gotweb_get_time_str returned
successfully.)

this still doesn't explain why gotwebd reached 600M of RES in hours,
so there's probably more.

ok?

diff /home/op/w/got
commit - f0680473a7db1e5941bffdc2ab5f80ddec209122
path + /home/op/w/got
blob - 363270dc22f396c6ba871d5448b712f226c3a791
file + gotwebd/gotweb.c
--- gotwebd/gotweb.c
+++ gotwebd/gotweb.c
@@ -1172,7 +1172,7 @@ gotweb_render_blame(struct request *c)
 	    "</div>\n"		/* #blame_header_wrapper */
 	    "<div class='dotted_line'></div>\n"
 	    "<div id='blame'>\n",
-	    age ? age : "",
+	    age,
 	    msg);
 	if (r == -1)
 		goto done;
@@ -1184,6 +1184,7 @@ gotweb_render_blame(struct request *c)
 	fcgi_printf(c, "</div>\n"	/* #blame */
 	    "</div>\n");		/* #blame_content */
 done:
+	free(age);
 	free(msg);
 	return error;
 }
@@ -1244,7 +1245,7 @@ gotweb_render_briefs(struct request *c)
 		    "<div class='briefs_log'>"
 		    "<a href='?index_page=%s&path=%s&action=diff&commit=%s"
 		    "&headref=%s'>%s</a>",
-		    age ? age : "",
+		    age,
 		    author,
 		    index_page_str, repo_dir->name, rc->commit_id, qs->headref,
 		    msg);
@@ -1353,7 +1354,7 @@ gotweb_render_commits(struct request *c)
 		    "<div class='commit'>\n%s</div>\n",
 		    rc->commit_id,
 		    author,
-		    age ? age : "",
+		    age,
 		    msg);
 		if (r == -1)
 			goto done;
@@ -1527,7 +1528,7 @@ gotweb_render_tree(struct request *c)
 	    "<div class='dotted_line'></div>\n"
 	    "<div id='tree'>\n",
 	    rc->tree_id,
-	    age ? age : "",
+	    age,
 	    msg);
 	if (r == -1)
 		goto done;
@@ -1539,6 +1540,7 @@ gotweb_render_tree(struct request *c)
 	fcgi_printf(c, "</div>\n"); /* #tree */
 	fcgi_printf(c, "</div>\n"); /* #tree_content */
 done:
+	free(age);
 	free(msg);
 	return error;
 }
@@ -1594,7 +1596,7 @@ gotweb_render_diff(struct request *c)
 	    rc->commit_id,
 	    rc->tree_id,
 	    author,
-	    age ? age : "",
+	    age,
 	    msg);
 	if (r == -1)
 		goto done;
@@ -1740,7 +1742,7 @@ gotweb_render_tag(struct request *c)
 	    rt->commit_id,
 	    tagname,
 	    author,
-	    age ? age : "",
+	    age,
 	    msg,
 	    rt->tag_commit);
 
@@ -1833,7 +1835,7 @@ gotweb_render_tags(struct request *c)
 		    "</div>\n"	/* .navs */
 		    "</div>\n"	/* .navs_wrapper */
 		    "<div class='dotted_line'></div>\n",
-		    age ? age : "",
+		    age,
 		    tagname,
 		    index_page_str, repo_dir->name, rt->commit_id,
 		    msg ? msg : "",