[src/trunk]: src/external/historical/nawk/dist PR/47553: Aleksev Cheusov: awk...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/6d1dc6e9c824
branches:  trunk
changeset: 784838:6d1dc6e9c824
user:      christos <christos%NetBSD.org@localhost>
date:      Mon Feb 11 00:32:07 2013 +0000

description:
PR/47553: Aleksev Cheusov: awk segfault: NULL dereference.

diffstat:

 external/historical/nawk/dist/tran.c |  2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diffs (12 lines):

diff -r f0e4411c548e -r 6d1dc6e9c824 external/historical/nawk/dist/tran.c
--- a/external/historical/nawk/dist/tran.c      Mon Feb 11 00:00:20 2013 +0000
+++ b/external/historical/nawk/dist/tran.c      Mon Feb 11 00:32:07 2013 +0000
@@ -358,7 +358,7 @@
                donefld = 0;    /* mark $1... invalid */
                donerec = 1;
        }
-       t = tostring(s);        /* in case it's self-assign */
+       t = s ? tostring(s) : tostring("");     /* in case it's self-assign */
        if (freeable(vp))
                xfree(vp->sval);
        vp->tval &= ~NUM;