[PATCH 09/22] hush: fix make_string behavior on empty strings

[Ahmad Fatoum]

clang-analyzer believes that an empty string could be passed here,
leading to a NULL dereference.

Avoid this situation by allocating a len (2 byte) string instead
to hold "\n" as value in that case.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 common/hush.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common/hush.c b/common/hush.c
index 608c0e4937c1..3a213fc54591 100644
--- a/common/hush.c
+++ b/common/hush.c
@@ -1885,6 +1885,10 @@ static char * make_string(char ** inp)
 		if (p != inp[n])
 			free(p);
 	}
+
+	if (!str)
+		str = xzalloc(len);
+
 	len = strlen(str);
 	*(str + len) = '\n';
 	*(str + len + 1) = '\0';
-- 
2.39.5