[PATCH] proc_loginuid_write() uses simple_strtoul() on non-terminated array

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 6cc77dc3f3ff..6afff725a8c9 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1019,8 +1019,8 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
         if (current != task)
                 return -EPERM;
 
-        if (count > PAGE_SIZE)
-                count = PAGE_SIZE;
+        if (count >= PAGE_SIZE)
+                count = PAGE_SIZE - 1;
 
         if (*ppos != 0) {
                 /* No partial writes. */
@@ -1033,6 +1033,7 @@ static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
         if (copy_from_user(page, buf, count))
                 goto out_free_page;
 
+        page[count] = '\0';
         loginuid = simple_strtoul(page, &tmp, 10);
         if (tmp == page) {
                 length = -EINVAL;