Commit febf108e authored Feb 26, 2018 by Eric Biggers Committed by Greg Kroah-Hartman Feb 28, 2018

binder: add missing binder_unlock()



When commit 4be5a281 ("binder: check for binder_thread allocation
failure in binder_poll()") was applied to 4.4-stable and 4.9-stable it
was forgotten to release the global binder lock in the new error path.
The global binder lock wasn't removed until v4.14, by commit
a60b890f607d ("binder: remove global binder lock").

Fix the new error path to release the lock.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 65aeceb5

drivers/android/binder.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -2628,8 +2628,10 @@ static unsigned int binder_poll(struct file *filp,
		binder_lock(__func__);

		thread = binder_get_thread(proc);
		if (!thread)
		if (!thread) {
		binder_unlock(__func__);
		return POLLERR;
		}

		wait_for_proc_work = thread->transaction_stack == NULL &&
		list_empty(&thread->todo) && thread->return_error == BR_OK;