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| author | 2023-02-23 22:46:41 +0100 | |
|---|---|---|
| committer | 2023-03-06 15:50:21 +0000 | |
| commit | d98e95c7c8892e45ca018b7c7227e3b658763df1 (patch) | |
| tree | 25a194b8aa40cd89b5ceddc797aaf19da4636888 /libs/androidfw/FileStream.cpp | |
| parent | 8247263184c1d5ef48e7a24e66e09c49a75eb7fc (diff) | |
Accept a Window as shown if it's in any transition
Previously, a malicious or confused app can DoS all other apps with
unshown surfaces by kicking off at least one new transition every
frame.
For example (see linked bug), an app in a busy-loop trying to request
permissions can prevent the launcher from showing Recents.
The significant change here is that when we see that there is a
transition set, we only block on mToken.waitingToShow if mToken
is not already part of another transition. Otherwise, there can
be a new transition generated every frame and the token is constantly
stuck waiting to show.
Test: atest CtsWindowManagerDeviceTestCases
Bug: 269108443
Fix: 271085429
Change-Id: I47ce9fdf5429795cbf083516c19b669bc407d1da
Diffstat (limited to 'libs/androidfw/FileStream.cpp')
0 files changed, 0 insertions, 0 deletions