This is a note to let you know that I've just added the patch titled
binder: add missing binder_unlock()
to the 4.9-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-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ebiggers3@xxxxxxxxx Mon Feb 26 20:36:21 2018
From: Eric Biggers <ebiggers3@xxxxxxxxx>
Date: Mon, 26 Feb 2018 10:56:45 -0800
Subject: binder: add missing binder_unlock()
To: stable@xxxxxxxxxxxxxxx, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>, Todd Kjos <tkjos@xxxxxxxxxxx>, Eric Biggers <ebiggers@xxxxxxxxxx>
Message-ID: <20180226185645.241652-1-ebiggers3@xxxxxxxxx>
From: Eric Biggers <ebiggers@xxxxxxxxxx>
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@xxxxxxxxxxxx>
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/android/binder.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -2628,8 +2628,10 @@ 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@xxxxxxxxx are
queue-4.9/binder-add-missing-binder_unlock.patch