From dc2a3eec17637007f91dffacd15a964e6d94ca50 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@kth.se>
Date: Sat, 17 Apr 2021 13:13:59 +0200
Subject: Reject surrogates in CSI u
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Signed-off-by: Mattias Andrée <maandree@kth.se>
---
 libterminput.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libterminput.c b/libterminput.c
index 81656aa..136f898 100644
--- a/libterminput.c
+++ b/libterminput.c
@@ -467,7 +467,7 @@ parse_sequence(union libterminput_input *input, struct libterminput_state *ctx)
 				input->mouseevent.y = (size_t)nums[1] + (size_t)!nums[1];
 				break;
 			case 'u':
-				if (nums[0] > 0x10FFFFULL) {
+				if (nums[0] > 0x10FFFFULL || (nums[0] & 0xD800) == 0xD800) {
 					input->type = LIBTERMINPUT_NONE;
 					break;
 				}
-- 
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