From: Jiri Bohac <[email protected]> Date: Thu, 20 Oct 2016 12:29:26 +0200
> The check for an underflow of tmp_prefered_lft is always false > because tmp_prefered_lft is unsigned. The intention of the check > was to guard against racing with an update of the > temp_prefered_lft sysctl, potentially resulting in an underflow. > > As suggested by David Miller, the best way to prevent the race is > by reading the sysctl variable using READ_ONCE. > > Signed-off-by: Jiri Bohac <[email protected]> > Reported-by: Julia Lawall <[email protected]> > Fixes: 76506a986dc3 ("IPv6: fix DESYNC_FACTOR") Applied, thanks Jiri.
