commit d0d74754f4b4cdc2c4a914dd7094f1bddf2fb419
author Suren Baghdasaryan <surenb@google.com> Tue Jan 10 19:00:47 2023 +0000
committer mdb:android-git <superproject-auto-update@invalid> Wed Jan 11 10:21:30 2023 +0000
tree c7c2881e9718ed8737a1ae4c871ba594768b185e
parent bcb3aec4eaf4a5c3ca4ac346aa39f83101089802

ANDROID: mm: fix vma refcounting for SPF in vm_area_dup

vm_area_dup() should reset the vma refcount to avoid leaking the newly
created vma in case the original vma being copies has an elevated
refcount due to concurrent page fault.

Fixes: d9d7f843da68 ("ANDROID: mm: introduce vma refcounting to protect vma during SPF")
Bug: 253557903
Bug: 264935773
Change-Id: I11324ac5661823e9c97b71afe6a894a094439960
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit c24377e58ac888484c9a613074b2ea0c76ee7e95)