[alsa-devel] [PATCH v4 02/12] vsprintf: pre-calculate final string length for later use

[André Goddard Rosa]

Signed-off-by: André Goddard Rosa <andre.goddard at gmail.com>
Acked-by: Frederic Weisbecker <fweisbec at gmail.com>
---
 lib/vsprintf.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 002f462..403e835 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1445,13 +1445,15 @@ do {									\
 		case FORMAT_TYPE_STR: {
 			const char *save_str = va_arg(args, char *);
 			size_t len;
+
 			if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE
 					|| (unsigned long)save_str < PAGE_SIZE)
 				save_str = null_str;
-			len = strlen(save_str);
-			if (str + len + 1 < end)
-				memcpy(str, save_str, len + 1);
-			str += len + 1;
+			len = strlen(save_str) + 1;
+			if (str + len < end)
+				memcpy(str, save_str, len);
+			str += len;
+
 			break;
 		}
 
-- 
1.6.5.2.153.g6e31f.dirty