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ANDROID: binder: fix regression in sender_euid

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A recent change to use proc->cred instead of proc->tsk as the source
for sender_euid caused a failure in the CredentialsTest#CaptureLayersTest
test. Revert 1 line of the patch to fix the test. The rest of the patch
needs to remain since the subsequent patches rely on it.

Before fixing upstream, we need to investigate more since the code looks
correct so the issue may be a latent userspace bug.

Bug: 205938623
Fixes: d65efd5b73dc ("UPSTREAM: binder: use euid from cred instead of using task")
Signed-off-by: Todd Kjos <tkjos@google.com>
Change-Id: I16543a50f43f79131234995fb0813de00795bd3d
This commit is contained in:
Todd Kjos
2021-11-11 18:31:04 -08:00
parent 6b7c37f6c4
commit a4eacf3227
1 changed files with 1 additions and 1 deletions
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2
drivers/android/binder.c
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@@ -2845,7 +2845,7 @@ static void binder_transaction(struct binder_proc *proc,
t->from = thread; t->from = thread;
else else
t->from = NULL; t->from = NULL;
t->sender_euid = binder_get_cred(proc)->euid; t->sender_euid = task_euid(proc->tsk);
t->to_proc = target_proc; t->to_proc = target_proc;
t->to_thread = target_thread; t->to_thread = target_thread;
t->code = tr->code; t->code = tr->code;