Commit 93166c11 authored by Martijn Coenen's avatar Martijn Coenen Committed by Todd Kjos
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UPSTREAM: ANDROID: binder: synchronize_rcu() when using POLLFREE. 



To prevent races with ep_remove_waitqueue() removing the
waitqueue at the same time.

Reported-by: default avatar <syzbot+a2a3c4909716e271487e@syzkaller.appspotmail.com>
Signed-off-by: default avatarMartijn Coenen <maco@android.com>
Cc: stable <stable@vger.kernel.org> # 4.14+
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 5eeb2ca0)

Change-Id: Ia0089448079c78d0ab0b57303faf838e9e5ee797
parent 8ab673e4
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