This is a partial revert of commit 29bc22ac5e5b ("binder: use euid from cred instead of using task"). Setting sender_euid using proc->cred caused some Android system test regressions that need further investigation. It is a partial reversion because subsequent patches rely on proc->cred.
Cc: stable@vger.kernel.org # 4.4+ Fixes: 29bc22ac5e5b ("binder: use euid from cred instead of using task") Signed-off-by: Todd Kjos tkjos@google.com Change-Id: I9b1769a3510fed250bb21859ef8beebabe034c66 --- - the issue was introduced in 5.16-rc1, so please apply to 5.16 - this should apply cleanly to all stable branches back to 4.4 that contain "binder: use euid from cred instead of using task"
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 49fb74196d02..cffbe57a8e08 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -2710,7 +2710,7 @@ static void binder_transaction(struct binder_proc *proc, t->from = thread; else t->from = NULL; - t->sender_euid = proc->cred->euid; + t->sender_euid = task_euid(proc->tsk); t->to_proc = target_proc; t->to_thread = target_thread; t->code = tr->code;