tree 6b93681b9cbdcd8e13117fd7a0bae61b55cf63ef
parent cea29db65e075585dbc8b58e9119c1447ad1adc4
author Todd Kjos <tkjos@android.com> 1561139655 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1563692676 +0200

binder: fix memory leak in error path

commit 1909a671dbc3606685b1daf8b22a16f65ea7edda upstream.

syzkallar found a 32-byte memory leak in a rarely executed error
case. The transaction complete work item was not freed if put_user()
failed when writing the BR_TRANSACTION_COMPLETE to the user command
buffer. Fixed by freeing it before put_user() is called.

Reported-by: syzbot+182ce46596c3f2e1eb24@syzkaller.appspotmail.com
Signed-off-by: Todd Kjos <tkjos@google.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>