[PATCH 4.4 40/53] ANDROID: binder: fix proc->tsk check.
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2017-08-28 08:15:17
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4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Martijn Coenen <redacted>
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 <redacted>
Tested-by: John Stultz <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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)