ANDROID: binder: fix proc->tsk check.

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@android.com>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 5ce7ee98f3b52645a8a26bd58e6c9f0552c5fbba..15009b2b33c7beafe9dc3063b2d560c10a04b4e7 100644 (file)
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -2875,7 +2875,7 @@ static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
        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)