commit e4e4fde51a309801af5eed72d3494cbf4b7737aa

Author: Paul Eggert <eggert@cs.ucla.edu>

Date:   Tue Sep 18 15:02:10 2018 -0700

    Fix tzfile low-memory assertion failure

    [BZ #21716]

    * time/tzfile.c (__tzfile_read): Check for memory exhaustion

    when registering time zone abbreviations.

diff --git a/time/tzfile.c b/time/tzfile.c

index 2a385b92bcdefec0..ea6e94030392fc75 100644

--- a/time/tzfile.c

+++ b/time/tzfile.c

@@ -410,7 +410,8 @@ __tzfile_read (const char *file, size_t extra, char **extrap)

   /* First "register" all timezone names.  */

   for (i = 0; i < num_types; ++i)

-    (void) __tzstring (&zone_names[types[i].idx]);

+    if (__tzstring (&zone_names[types[i].idx]) == NULL)

+      goto ret_free_transitions;

   /* Find the standard and daylight time offsets used by the rule file.

      We choose the offsets in the types of each flavor that are