1Fix use-after-free in awk. 2 3CVE: CVE-2022-30065 4Upstream-Status: Submitted [http://lists.busybox.net/pipermail/busybox/2022-June/089768.html] 5Signed-off-by: Ross Burton <ross.burton@arm.com> 6 7fixes https://bugs.busybox.net/show_bug.cgi?id=14781 8 9Signed-off-by: Natanael Copa <ncopa at alpinelinux.org> 10--- 11 editors/awk.c | 3 +++ 12 1 file changed, 3 insertions(+) 13 14diff --git a/editors/awk.c b/editors/awk.c 15index 079d0bde5..728ee8685 100644 16--- a/editors/awk.c 17+++ b/editors/awk.c 18@@ -3128,6 +3128,9 @@ static var *evaluate(node *op, var *res) 19 20 case XC( OC_MOVE ): 21 debug_printf_eval("MOVE\n"); 22+ /* make sure that we never return a temp var */ 23+ if (L.v == TMPVAR0) 24+ L.v = res; 25 /* if source is a temporary string, jusk relink it to dest */ 26 if (R.v == TMPVAR1 27 && !(R.v->type & VF_NUMBER) 28-- 292.36.1 30