indent(1): don't overflow di_stack[]

2018-06-03 18:29:20 +00:00 · 2018-06-03 18:29:20 +00:00 · 89e7752398
commit 89e7752398
parent 4522d5b3c8
1 changed files with 6 additions and 1 deletions
--- a/usr.bin/indent/indent.c
+++ b/usr.bin/indent/indent.c
@ -831,7 +831,12 @@ main(int argc, char **argv)
 					 * with '{' */
 	    if (ps.in_decl && ps.in_or_st) {	/* this is either a structure
 						 * declaration or an init */
-		di_stack[ps.dec_nest++] = dec_ind;
+		di_stack[ps.dec_nest] = dec_ind;
+		if (++ps.dec_nest == nitems(di_stack)) {
+		    diag3(0, "Reached internal limit of %d struct levels",
+			nitems(di_stack));
+		    ps.dec_nest--;
+		}
 		/* ?		dec_ind = 0; */
 	    }
 	    else {