This is a note to let you know that I've just added the patch titled ANDROID: binder: fix proc->tsk check. 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: android-binder-fix-proc-tsk-check.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@xxxxxxxxxxxxxxx> know about it. >From b2a6d1b999a4c13e5997bb864694e77172d45250 Mon Sep 17 00:00:00 2001 From: Martijn Coenen <maco@xxxxxxxxxxx> Date: Fri, 28 Jul 2017 13:56:08 +0200 Subject: ANDROID: binder: fix proc->tsk check. From: Martijn Coenen <maco@xxxxxxxxxxx> commit b2a6d1b999a4c13e5997bb864694e77172d45250 upstream. Commit c4ea41ba195d ("binder: use group leader instead of open thread")' was incomplete and didn't update a check in binder_mmap(), causing all mmap() calls into the binder driver to fail. Signed-off-by: Martijn Coenen <maco@xxxxxxxxxxx> Tested-by: John Stultz <john.stultz@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/android/binder.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -2869,7 +2869,7 @@ static int binder_mmap(struct file *filp const char *failure_string; struct binder_buffer *buffer; - if (proc->tsk != current) + if (proc->tsk != current->group_leader) return -EINVAL; if ((vma->vm_end - vma->vm_start) > SZ_4M) Patches currently in stable-queue which might be from maco@xxxxxxxxxxx are queue-4.4/android-binder-fix-proc-tsk-check.patch