3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric W. Biederman <ebiederm@xxxxxxxxxxxx> commit 36476beac4f8ca9dc7722790b2e8ef0e8e51034e upstream. It is important that all maps are less than PAGE_SIZE or else setting the last byte of the buffer to '0' could write off the end of the allocated storage. Correct the misleading comment. Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/user_namespace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/user_namespace.c +++ b/kernel/user_namespace.c @@ -643,7 +643,7 @@ static ssize_t map_write(struct file *fi if (!page) goto out; - /* Only allow <= page size writes at the beginning of the file */ + /* Only allow < page size writes at the beginning of the file */ ret = -EINVAL; if ((*ppos != 0) || (count >= PAGE_SIZE)) goto out;
