File bsc1218014-cve-2023-50495.patch of Package ncurses.31889

---
 ncurses/tinfo/parse_entry.c |   23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

--- ncurses/tinfo/parse_entry.c
+++ ncurses/tinfo/parse_entry.c	2023-04-24 22:32:33.000000000 +0000
@@ -109,7 +109,7 @@ _nc_extend_names(ENTRY * entryp, char *n
 	/* Well, we are given a cancel for a name that we don't recognize */
 	return _nc_extend_names(entryp, name, STRING);
     default:
-	return 0;
+	return NULL;
     }
 
     /* Adjust the 'offset' (insertion-point) to keep the lists of extended
@@ -141,6 +141,11 @@ _nc_extend_names(ENTRY * entryp, char *n
 	for (last = (unsigned) (max - 1); last > tindex; last--)
 
     if (!found) {
+	char *saved;
+
+	if ((saved = _nc_save_str(name)) == NULL)
+	    return NULL;
+
 	switch (token_type) {
 	case BOOLEAN:
 	    tp->ext_Booleans++;
@@ -168,7 +173,7 @@ _nc_extend_names(ENTRY * entryp, char *n
 	TYPE_REALLOC(char *, actual, tp->ext_Names);
 	while (--actual > offset)
 	    tp->ext_Names[actual] = tp->ext_Names[actual - 1];
-	tp->ext_Names[offset] = _nc_save_str(name);
+	tp->ext_Names[offset] = saved;
     }
 
     temp.nte_name = tp->ext_Names[offset];
@@ -303,6 +308,8 @@ _nc_parse_entry(ENTRY * entryp, int lite
 	bool is_use = (strcmp(_nc_curr_token.tk_name, "use") == 0);
 	bool is_tc = !is_use && (strcmp(_nc_curr_token.tk_name, "tc") == 0);
 	if (is_use || is_tc) {
+	    char *saved;
+
 	    if (!VALID_STRING(_nc_curr_token.tk_valstring)
 		|| _nc_curr_token.tk_valstring[0] == '\0') {
 		_nc_warning("missing name for use-clause");
@@ -316,11 +323,13 @@ _nc_parse_entry(ENTRY * entryp, int lite
 			    _nc_curr_token.tk_valstring);
 		continue;
 	    }
-	    entryp->uses[entryp->nuses].name = _nc_save_str(_nc_curr_token.tk_valstring);
-	    entryp->uses[entryp->nuses].line = _nc_curr_line;
-	    entryp->nuses++;
-	    if (entryp->nuses > 1 && is_tc) {
-		BAD_TC_USAGE
+	    if ((saved = _nc_save_str(_nc_curr_token.tk_valstring)) != NULL) {
+		entryp->uses[entryp->nuses].name = saved;
+		entryp->uses[entryp->nuses].line = _nc_curr_line;
+		entryp->nuses++;
+		if (entryp->nuses > 1 && is_tc) {
+		    BAD_TC_USAGE
+		}
 	    }
 	} else {
 	    /* normal token lookup */