From: Martijn Coenen <maco@xxxxxxxxxxx>
This patch has been added to the v4.1 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit b2a6d1b999a4c13e5997bb864694e77172d45250 ]
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>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
---
drivers/android/binder.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 6f086415727c..235ba1fbabdb 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -2865,7 +2865,7 @@ 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)
--
2.11.0