db: Discard unsupported ansi sequences

Similarly to 360d54234f76 ("kd: Discard unsupported ansi sequences"), we
should discard unsupported ansi sequences in db input, notably the
bracketed paste sequences.

1 files changed, 11 insertions, 0 deletions

diff --git a/ddb/db_input.c b/ddb/db_input.c
index 357474b7..04d67510 100644
--- a/ddb/db_input.c
+++ b/ddb/db_input.c
@@ -343,6 +343,17 @@ db_inputchar(int c)
 
 	    default:
 	    plain:
+		if (was_csi) {
+			if (c == '?' || c == '<' || (c >= '0' && c <= '9') || c == ';') {
+				/* Still in CSI */
+				csi = 1;
+				break;
+			}
+			if (c >= '@' && c <= '~')
+				/* Unsupported sequence, silently drop */
+				break;
+			/* Odd sequence, print it */
+		}
 		if (db_le == db_lbuf_end) {
 		    cnputc('\007');
 		}