linux-kernel - Re: [PATCH] binder: Add invalid handle info in user error log

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Date:   Mon, 2 Aug 2021 11:22:01 -0700
From:   Todd Kjos <tkjos@...gle.com>
To:     Ramji Jiyani <ramjiyani@...gle.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arve Hjønnevåg <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <christian@...uner.io>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        kernel-team@...roid.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] binder: Add invalid handle info in user error log

On Mon, Aug 2, 2021 at 10:41 AM 'Ramji Jiyani' via kernel-team
<kernel-team@...roid.com> wrote:
>
> In case of a fail transaction to the target node; user error log currently

nit: I'd rephrase this to something like  "In the case of a failed
transaction, only the thread and process id are logged. Add the handle
info..."

> only prints the thread and process id. Add handle info for the reference
> to the target node in user error log to aid debugging.
>
> Signed-off-by: Ramji Jiyani <ramjiyani@...gle.com>

Acked-by: Todd Kjos <tkjos@...gle.com>

> ---
>  drivers/android/binder.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/android/binder.c b/drivers/android/binder.c
> index bcec598b89f2..d9030cb6b1e4 100644
> --- a/drivers/android/binder.c
> +++ b/drivers/android/binder.c
> @@ -2547,8 +2547,8 @@ static void binder_transaction(struct binder_proc *proc,
>                                                 ref->node, &target_proc,
>                                                 &return_error);
>                         } else {
> -                               binder_user_error("%d:%d got transaction to invalid handle\n",
> -                                                 proc->pid, thread->pid);
> +                               binder_user_error("%d:%d got transaction to invalid handle, %u\n",
> +                                                 proc->pid, thread->pid, tr->target.handle);
>                                 return_error = BR_FAILED_REPLY;
>                         }
>                         binder_proc_unlock(proc);
> --
> 2.32.0.554.ge1b32706d8-goog
>
> --
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