kernel/sysctl_binary.c: use scnprintf() instead of snprintf()

snprintf() will return the 'ideal' length which may be larger than real
buffer length, if we only want to use real length, need use scnprintf()
instead of.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
index b609213ca9a2f310f169a4d08c08cf1c36f56791..653cbbd9e7ad4dcb1ee0647c6d11cc453b1e81a9 100644 (file)
--- a/kernel/sysctl_binary.c
+++ b/kernel/sysctl_binary.c
@@ -1024,7 +1024,7 @@ static ssize_t bin_intvec(struct file *file,
                        if (get_user(value, vec + i))
                                goto out_kfree;
 
-                       str += snprintf(str, end - str, "%lu\t", value);
+                       str += scnprintf(str, end - str, "%lu\t", value);
                }
 
                result = kernel_write(file, buffer, str - buffer, 0);
@@ -1095,7 +1095,7 @@ static ssize_t bin_ulongvec(struct file *file,
                        if (get_user(value, vec + i))
                                goto out_kfree;
 
-                       str += snprintf(str, end - str, "%lu\t", value);
+                       str += scnprintf(str, end - str, "%lu\t", value);
                }
 
                result = kernel_write(file, buffer, str - buffer, 0);
@@ -1205,7 +1205,7 @@ static ssize_t bin_dn_node_address(struct file *file,
                if (get_user(dnaddr, (__le16 __user *)newval))
                        goto out;
 
-               len = snprintf(buf, sizeof(buf), "%hu.%hu",
+               len = scnprintf(buf, sizeof(buf), "%hu.%hu",
                                le16_to_cpu(dnaddr) >> 10,
                                le16_to_cpu(dnaddr) & 0x3ff);