[CRIU] [PATCH] compel: std_vprint_num returns a null-terminated string

[Joel Nider]

This function is an analogue to vsprintf(), and is used in very much the
same way. The caller expects the modified string pointer to be pointing to
a null-terminated string.

Signed-off-by: Joel Nider <joeln at il.ibm.com>
---
 compel/plugins/std/log.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compel/plugins/std/log.c b/compel/plugins/std/log.c
index 2d622d6..4f2e9e7 100644
--- a/compel/plugins/std/log.c
+++ b/compel/plugins/std/log.c
@@ -143,6 +143,7 @@ int std_vprint_num(char *buf, int blen, int num, char **ps)
 	char *s;
 
 	s = &buf[blen - 1];
+	*s-- = 0; /* make sure the returned string is NULL terminated */
 
 	if (num < 0) {
 		neg = 1;
@@ -166,7 +167,7 @@ int std_vprint_num(char *buf, int blen, int num, char **ps)
 done:
 	s++;
 	*ps = s;
-	return blen - (s - buf);
+	return blen - (s - buf) - 1;
 }
 
 static void print_num(int num, struct simple_buf *b)
-- 
2.7.4