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userns; Correct the comment in map_write

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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@xmission.com>
This commit is contained in:
Eric W. Biederman 2014-12-05 20:03:28 -06:00
parent 66d2f338ee
commit 36476beac4
1 changed files with 1 additions and 1 deletions
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2
kernel/user_namespace.c
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@ -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;