On Fri, Oct 09, 2020 at 09:55:59AM -0600, Shuah Khan wrote: > counter_atomic* is introduced to be used when a variable is used as > a simple counter and doesn't guard object lifetimes. This clearly > differentiates atomic_t usages that guard object lifetimes. > > counter_atomic* variables wrap around to INT_MIN when it overflows > and should not be used to guard resource lifetimes, device usage and > open counts that control state changes, and pm states. > > devcd_count is used to track dev_coredumpm device count and used in > device name string. It doesn't guard object lifetimes, device usage > counts, device open counts, and pm states. There is very little chance > of this counter overflowing. Convert it to use counter_atomic32. > > This conversion doesn't change the overflow wrap around behavior. > > Reviewed-by: Greg Kroah-Hartman <[email protected]> > Signed-off-by: Shuah Khan <[email protected]>
Reviewed-by: Kees Cook <[email protected]> -- Kees Cook
