From e289d34b9a50b46f57698980e899b71f0069abda Mon Sep 17 00:00:00 2001
From: ailin-nemui <ailin-nemui@users.noreply.github.com>
Date: Wed, 14 Feb 2018 15:04:16 +0100
Subject: limit alignment padding to a screenful

Credit to Oss-Fuzz
---
 src/core/special-vars.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src')

diff --git a/src/core/special-vars.c b/src/core/special-vars.c
index e131b0ed..33d9cd55 100644
--- a/src/core/special-vars.c
+++ b/src/core/special-vars.c
@@ -33,6 +33,8 @@
 #define isarg(c) \
 	(i_isdigit(c) || (c) == '*' || (c) == '~' || (c) == '-')
 
+#define ALIGN_MAX 222488
+
 static SPECIAL_HISTORY_FUNC history_func = NULL;
 
 static char *get_argument(char **cmd, char **arglist)
@@ -300,6 +302,10 @@ static int get_alignment_args(char **data, int *align, int *flags, char *pad)
 	if (!parse_uint(str, &endptr, 10, &align_)) {
 		return FALSE;
 	}
+	/* alignment larger than supported */
+	if (align_ > ALIGN_MAX) {
+		return FALSE;
+	}
 	str = endptr;
 	*align = align_;
 
-- 
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