Fix crash (segfault) in etags on generating tags for Erlang files

* lib-src/etags.c: Set allocated and lastlen to zero, after
freeing last ptr in Erlang_functions to prevent dereferencing NULL
pointer (bug#45122).

Copyright-paperwork-exempt: yes

(cherry picked from commit 2d8f0364fcd1d5dad2b82dd3a9af870b03854547)

diff --git a/lib-src/etags.c b/lib-src/etags.c
index f761a7b7c33eef6e4b6d350162b5a5d235bb0953..502f90920d29167b5ac6491cfa2c6c3e76ebeac3 100644 (file)
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -6062,6 +6062,7 @@ Erlang_functions (FILE *inf)
            {
              free (last);
              last = NULL;
+             allocated = lastlen = 0;
            }
        }
       else