Patch "binder: add missing binder_unlock()" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    binder: add missing binder_unlock()

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     binder-add-missing-binder_unlock.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ebiggers3@gmail.com  Mon Feb 26 20:36:21 2018
From: Eric Biggers <ebiggers3@gmail.com>
Date: Mon, 26 Feb 2018 10:56:45 -0800
Subject: binder: add missing binder_unlock()
To: stable@vger.kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guenter Roeck <linux@roeck-us.net>, Todd Kjos <tkjos@android.com>, Eric Biggers <ebiggers@google.com>
Message-ID: <20180226185645.241652-1-ebiggers3@gmail.com>


From: Eric Biggers <ebiggers@google.com>

When commit 4be5a2810489 ("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>
---
 drivers/android/binder.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -2622,8 +2622,10 @@ static unsigned int binder_poll(struct f
 	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;


Patches currently in stable-queue which might be from ebiggers3@gmail.com are

queue-4.4/binder-add-missing-binder_unlock.patch