[nasm:nasm-2.14.xx] listing: list_emit -- Don't forget to zap listerr_head

[nasm-bot f. C. G. <gor...@gm...>]

Commit-ID:  532d9f9dcb3bea728debf38d75a12473e75cfdcc
Gitweb:     http://repo.or.cz/w/nasm.git?a=commitdiff;h=532d9f9dcb3bea728debf38d75a12473e75cfdcc
Author:     Cyrill Gorcunov <gor...@gm...>
AuthorDate: Tue, 25 Dec 2018 13:11:55 +0300
Committer:  Cyrill Gorcunov <gor...@gm...>
CommitDate: Tue, 25 Dec 2018 13:11:55 +0300

listing: list_emit -- Don't forget to zap listerr_head

In list_emit we walk over listerr_head freeing the list,
but the head pointer remain carrying old value. Need
to clean it up once traverse is done to not access
already freed memory later.

https://bugzilla.nasm.us/show_bug.cgi?id=3392538

Reported-by: ru...@co...
Signed-off-by: Cyrill Gorcunov <gor...@gm...>


---
 asm/listing.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/asm/listing.c b/asm/listing.c
index 4d753dbd..b79f11ae 100644
--- a/asm/listing.c
+++ b/asm/listing.c
@@ -128,6 +128,7 @@ static void list_emit(void)
 	fprintf(listfp, "  %s\n", le->str);
         nasm_free(le);
     }
+    listerr_head = NULL;
     listerr_tail = &listerr_head;
 }