timezone __secs_to_zone stub: guard against null pointer dereference

Closes #506
WebAssembly · Jun 16, 2024 · cfe7250 · cfe7250
1 parent 3184536
commit cfe7250
Showing 1 changed file with 8 additions and 4 deletions.
diff --git a/libc-top-half/musl/src/time/__tz.c b/libc-top-half/musl/src/time/__tz.c
@@ -434,10 +434,14 @@ weak_alias(__tzset, tzset);
 void __secs_to_zone(long long t, int local, int *isdst, int *offset, long *oppoff, const char **zonename)
 {
  // Minimalist implementation for now.
- *isdst = 0;
- *offset = 0;
- *oppoff = 0;
- *zonename = __utc;
+ if (isdst)
+ *isdst = 0;
+ if (offset)
+ *offset = 0;
+ if (oppoff)
+ *oppoff = 0;
+ if (zonename)
+ *zonename = __utc;
 }
 #endif