On Wed, Apr 20, 2016 at 03:43:13PM -0400, Tejun Heo wrote:
On Sun, Apr 17, 2016 at 03:04:31PM -0500, serge.hallyn-GeWIH/nMZzLQT0dZR+AlfA@public.gmane.org wrote:
quoted
From: Serge Hallyn <redacted>
We've calculated @len to be the bytes we need for '/..' entries from
@kn_from to the common ancestor, and calculated @nlen to be the extra
bytes we need to get from the common ancestor to @kn_to. We use them
as such at the end. But in the loop copying the actual entries, we
overwrite @nlen. Use a temporary variable for that instead.
Without this, the return length, when the buffer is large enough, is
wrong. (When the buffer is NULL or too small, the returned value is
correct. The buffer contents are also correct.)
Interestingly, no callers of this function are affected by this as of
yet. However the upcoming cgroup_show_path() will be.
Signed-off-by: Serge Hallyn <redacted>
Acked-by: Tejun Heo <redacted>
Greg, can you please pick this one up for v4.6?
Looks like Greg missed this one. Greg, I'll route this through
cgroup/for-4.6-fixes.
Thanks.
--
tejun