From 8395d89309242075db33d5881f54cedceab19427 Mon Sep 17 00:00:00 2001
From: Mike Lin <dna@mlin.net>
Date: Sat, 8 Jan 2022 01:17:14 -1000
Subject: [PATCH] fix \r\r\n

---
 kstring.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kstring.c b/kstring.c
index 6c3fcaa1ba..653212210d 100644
--- a/kstring.c
+++ b/kstring.c
@@ -312,14 +312,15 @@ int kgetline3(kstring_t *s, kgets_func2 *fgets_fn, void *fp)
 
 int kgetline2(kstring_t *s, kgets_func2 *fgets_fn, void *fp)
 {
+	size_t l0 = s->l;
 	int ret = kgetline3(s, fgets_fn, fp);
 	if (ret < 0) {
 		return ret;
 	}
 
-	if (s->l && s->s[s->l-1] == '\n') {
+	if (s->l > l0 && s->s[s->l-1] == '\n') {
 		s->l--;
-		if (s->l && s->s[s->l-1] == '\r') s->l--;
+		if (s->l > l0 && s->s[s->l-1] == '\r') s->l--;
 	}
 	s->s[s->l] = '\0';
 	return 0;