[SCM] gawk branch, master, updated. gawk-4.1.0-5404-g30029046

[Arnold Robbins]

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- Log -----------------------------------------------------------------
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=30029046a2e096df4d9fcb7aedc01e393abce88d

commit 30029046a2e096df4d9fcb7aedc01e393abce88d
Author: Arnold D. Robbins <arnold@skeeve.com>
Date:   Mon Oct 23 21:01:34 2023 +0300

    Fix a use-after-free error for gensub.

diff --git a/ChangeLog b/ChangeLog
index 39a5bfc4..e00083e4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2023-10-23         Arnold D. Robbins     <arnold@skeeve.com>
+
+       * builtin.c (do_sub): Fix a use-after-free issue reported
+       by Miguel Pineiro Jr. <mpj@pineiro.cc>.
+
 2023-10-22         Arnold D. Robbins     <arnold@skeeve.com>
 
        * nonposix.h, re.c: Update coyright year.
diff --git a/builtin.c b/builtin.c
index 88663ebe..ba3459db 100644
--- a/builtin.c
+++ b/builtin.c
@@ -3330,8 +3330,9 @@ done:
                        return make_str_node(buf, textlen, ALREADY_MALLOCED);
                } else if ((target->flags & STRING) == 0) {
                        /* return a copy of original string */
+                       NODE *copy = make_str_node(target->stptr, 
target->stlen, 0);
                        DEREF(target);
-                       return make_str_node(target->stptr, target->stlen, 0);
+                       return copy;
                }
 
                /* return the original string */

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog | 5 +++++
 builtin.c | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)


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