awk: don't segfault on printf(%*s). Close 1337.

1 files changed, 4 insertions, 1 deletions

diff --git a/editors/awk.c b/editors/awk.c
index bc9e99a6f..2e67f67fb 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -1756,8 +1756,11 @@ static char *awk_printf(node *n)
                 s = f;
                 while (*f && (*f != '%' || *(++f) == '%'))
                         f++;
-                while (*f && !isalpha(*f))
+                while (*f && !isalpha(*f)) {
+                        if (*f == '*')
+                                syntax_error("%*x formats are not supported");
                         f++;
+                }
 
                 incr = (f - s) + MAXVARFMT;
                 qrealloc(&b, incr + i, &bsize);