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authorEric W. Biederman <ebiederm@xmission.com>2014-12-05 20:03:28 -0600
committerEric W. Biederman <ebiederm@xmission.com>2014-12-11 18:07:06 -0600
commit36476beac4f8ca9dc7722790b2e8ef0e8e51034e (patch)
tree26eb0855cf23ff3978821e2e5ab42d6df7902ccb
parent66d2f338ee4c449396b6f99f5e75cd18eb6df272 (diff)
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" <ebiederm@xmission.com>
-rw-r--r--kernel/user_namespace.c2
1 files changed, 1 insertions, 1 deletions
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;