shared: time-dst: Avoid buffer overflow

Commit 681f9718 introduced an additional null terminator for the zone names.
Increase the allocation of "transitions" to actually make room for this.

diff --git a/src/shared/time-dst.c b/src/shared/time-dst.c
index 926d22b..1ce6f72 100644 (file)
--- a/src/shared/time-dst.c
+++ b/src/shared/time-dst.c
@@ -183,7 +183,8 @@ read_again:
                         return -EINVAL;
         }
 
-        transitions = malloc0(total_size + tzspec_len);
+        /* leave space for additional zone_names zero terminator */
+        transitions = malloc0(total_size + tzspec_len + 1);
         if (transitions == NULL)
                 return -EINVAL;