back port upstream patch
ebe06187bf
the epi is removed from list by list_del_rcu(&epi->fllink);
under list_for_each_entry_rcu() without rcu_read_lock.
if the rcu grace-period thread free epi before next list_for_each loop,
the content of epi will be corrupted.
Change-Id: I75dbf8ada5ca4734761efe260ca6d6f85886b180
Closes-Bug: 1837430
Suggested-by: daniel.badea@windriver.com
Signed-off-by: Bin Yang <bin.yang@intel.com>
853388e615