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(parent: b710848) | patch
binder: fix possible UAF when freeing buffer
authorTodd Kjos <tkjos@android.com>
Wed, 12 Jun 2019 20:29:27 +0000 (13:29 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 13 Jun 2019 08:35:55 +0000 (10:35 +0200)
commita370003cc301d4361bae20c9ef615f89bf8d1e8a
treed96c2242a45c688ac249891b7a4d39851a2b2e19tree | snapshot
parentb7108486d2d60357dec274276e2f69128f29dcdccommit | diff
binder: fix possible UAF when freeing buffer

There is a race between the binder driver cleaning
up a completed transaction via binder_free_transaction()
and a user calling binder_ioctl(BC_FREE_BUFFER) to
release a buffer. It doesn't matter which is first but
they need to be protected against running concurrently
which can result in a UAF.

Signed-off-by: Todd Kjos <tkjos@google.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/android/binder.c diff | blob | history
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