debuginfod: Clear and reset debuginfod_client winning_headers on reuse

gcc address sanitizer detected a leak of the debuginfod_client
winning_headers when the handle was reused. Make sure to free and
reset the winning_headers field before reuse.

Signed-off-by: Mark Wielaard <mark@klomp.org>

diff --git a/debuginfod/ChangeLog b/debuginfod/ChangeLog
index 21d0721..8c937d6 100644 (file)
--- a/debuginfod/ChangeLog
+++ b/debuginfod/ChangeLog
@@ -1,3 +1,8 @@
+2021-12-04  Mark Wielaard  <mark@klomp.org>
+
+       * debuginfod-client.c (debuginfod_query_server): Free winning_headers.
+       Reset response_data_size when clearing response_data.
+
 2021-12-01  Mark Wielaard  <mark@klomp.org>
 
        * debuginfod-client.c (debuginfod_query_server): Free tmp_url on

diff --git a/debuginfod/debuginfod-client.c b/debuginfod/debuginfod-client.c
index 75d3e30..9bf97bf 100644 (file)
--- a/debuginfod/debuginfod-client.c
+++ b/debuginfod/debuginfod-client.c
@@ -1031,7 +1031,11 @@ debuginfod_query_server (debuginfod_client *c,
   int committed_to = -1;
   bool verbose_reported = false;
   struct timespec start_time, cur_time;
-  c->winning_headers = NULL;
+  if (c->winning_headers != NULL)
+    {
+      free (c->winning_headers);
+      c->winning_headers = NULL;
+    }
   if ( maxtime > 0 && clock_gettime(CLOCK_MONOTONIC_RAW, &start_time) == -1)
     {
       rc = errno;
@@ -1075,6 +1079,7 @@ debuginfod_query_server (debuginfod_client *c,
                     if (vfd >= 0 && c->winning_headers != NULL)
                       dprintf(vfd, "\n%s", c->winning_headers);
                     data[committed_to].response_data = NULL;
+                    data[committed_to].response_data_size = 0;
                   }
 
               }