From 36476beac4f8ca9dc7722790b2e8ef0e8e51034e Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 5 Dec 2014 20:03:28 -0600 Subject: [PATCH] userns; Correct the comment in map_write 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" --- kernel/user_namespace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c index a2e37c5d2f63..ad419b04c146 100644 --- a/kernel/user_namespace.c +++ b/kernel/user_namespace.c @@ -643,7 +643,7 @@ static ssize_t map_write(struct file *file, const char __user *buf, 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; -- 2.30.2