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From: Martijn Coenen <maco@google.com>
To: Amit Pundir <amit.pundir@linaro.org>
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"John Stultz" <john.stultz@linaro.org>,
	"Todd Kjos" <tkjos@android.com>,
	"Arve Hjønnevåg" <arve@android.com>,
	devel@driverdev.osuosl.org,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Todd Kjos" <tkjos@google.com>
Subject: Re: [PATCH 02/37] binder: use group leader instead of open thread
Date: Fri, 28 Jul 2017 13:58:47 +0200	[thread overview]
Message-ID: <CA+_MTtzeB_0XNE1m0jLUiKucMcokn=-kpTn9RGpmvb-fxmekAg@mail.gmail.com> (raw)
In-Reply-To: <CAMi1Hd0MzZzEv5eO6OwhiB2_Q9Dczfe_nv5DGTfNbPAT8ObbxA@mail.gmail.com>

I took the time to look at what else is different between common and
upstream, and just sent 3 patches to LKML to reconcile. One of the 3
fixes this particular problem.

On Thu, Jul 27, 2017 at 3:42 PM, Amit Pundir <amit.pundir@linaro.org> wrote:
> On 27 July 2017 at 18:53, Greg Kroah-Hartman <gregkh@linuxfoundation.org> wrote:
>> On Thu, Jul 27, 2017 at 02:38:30PM +0530, Amit Pundir wrote:
>>> Hi,
>>>
>>> On 25 July 2017 at 14:43, Martijn Coenen <maco@google.com> wrote:
>>> > Hi John,
>>> >
>>> > On Mon, Jul 24, 2017 at 11:07 PM, John Stultz <john.stultz@linaro.org> wrote:
>>> >>
>>> >> 12-31 16:00:36.632  2518  2584 E hw-ProcessState: Using /dev/hwbinder
>>> >> failed: unable to mmap transaction memory.
>>> >
>>> > This doesn't look right. Is there anything in the kernel log?
>>>
>>> There is a slight difference in this patch and the one that got pushed
>>> in android-4.9[1]. I cherry-picked those changes and got BT/WiFi
>>> working again on Hikey with mainline tracking (4.13-rc2) tree.
>>>
>>> Regards,
>>> Amit Pundir
>>> [1] https://android.googlesource.com/kernel/common/+/872c26eb0776ef160447d8703779e2bce0b7230a%5E%21/#F0
>>
>> And what is that difference?
>
> These couple of lines of change:
>
> diff --git a/drivers/android/binder.c b/drivers/android/binder.c
> index f7665c31feca..d7291a5a13e1 100644
> --- a/drivers/android/binder.c
> +++ b/drivers/android/binder.c
> @@ -3362,7 +3362,7 @@ 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)
> @@ -3466,6 +3466,7 @@ static int binder_open(struct inode *nodp,
> struct file *filp)
>                 return -ENOMEM;
>         get_task_struct(current->group_leader);
>         proc->tsk = current->group_leader;
> +       proc->vma_vm_mm = current->group_leader->mm;
>         INIT_LIST_HEAD(&proc->todo);
>         init_waitqueue_head(&proc->wait);
>         proc->default_priority = task_nice(current);
>
> John reported hw_binder mmap failure in his logcat. So I'm assuming
> that the check in binder_mmap is where the binder failed and returned.
>
> Regards,
> Amit Pundir

  reply	other threads:[~2017-07-28 11:58 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-29 19:01 [PATCH 00/37] fine-grained locking in binder driver Todd Kjos
2017-06-29 19:01 ` [PATCH 01/37] Revert "android: binder: Sanity check at binder ioctl" Todd Kjos
2017-07-03  9:17   ` Greg KH
     [not found]     ` <CAHRSSExh9JX5xiSRig55DSei31C_BPSasOKB+BTC6jjjuZ+ZpA@mail.gmail.com>
2017-07-05 18:47       ` Greg KH
2017-06-29 19:01 ` [PATCH 02/37] binder: use group leader instead of open thread Todd Kjos
2017-07-03  9:17   ` Greg KH
     [not found]     ` <CAHRSSEyH3t0igLJqcC4e-HR68RH0bg4T310jnRHZzrMChoOeOg@mail.gmail.com>
2017-07-05 18:47       ` Greg KH
2017-07-07 18:23         ` Todd Kjos
2017-07-07 18:29           ` Greg KH
2017-07-24 21:00   ` John Stultz
2017-07-24 21:07     ` John Stultz
2017-07-25  9:13       ` Martijn Coenen
2017-07-27  9:08         ` Amit Pundir
2017-07-27 13:23           ` Greg Kroah-Hartman
2017-07-27 13:40             ` Martijn Coenen
2017-07-27 13:42             ` Amit Pundir
2017-07-28 11:58               ` Martijn Coenen [this message]
2017-07-24 21:23     ` Greg Kroah-Hartman
2017-07-24 21:53       ` John Stultz
2017-06-29 19:01 ` [PATCH 03/37] binder: Use wake up hint for synchronous transactions Todd Kjos
2017-07-03  9:18   ` Greg KH
2017-06-29 19:01 ` [PATCH 04/37] binder: separate binder allocator structure from binder proc Todd Kjos
2017-06-29 19:01 ` [PATCH 05/37] binder: remove unneeded cleanup code Todd Kjos
2017-06-29 19:01 ` [PATCH 06/37] binder: separate out binder_alloc functions Todd Kjos
2017-06-29 19:01 ` [PATCH 07/37] binder: move binder_alloc to separate file Todd Kjos
2017-06-29 19:01 ` [PATCH 08/37] binder: remove binder_debug_no_lock mechanism Todd Kjos
2017-06-29 19:01 ` [PATCH 09/37] binder: add protection for non-perf cases Todd Kjos
2017-06-29 19:01 ` [PATCH 10/37] binder: change binder_stats to atomics Todd Kjos
2017-06-29 19:01 ` [PATCH 11/37] binder: make binder_last_id an atomic Todd Kjos
2017-06-29 19:01 ` [PATCH 12/37] binder: add log information for binder transaction failures Todd Kjos
2017-06-29 19:01 ` [PATCH 13/37] binder: refactor queue management in binder_thread_read Todd Kjos
2017-06-29 19:01 ` [PATCH 14/37] binder: avoid race conditions when enqueuing txn Todd Kjos
2017-06-29 19:01 ` [PATCH 15/37] binder: don't modify thread->looper from other threads Todd Kjos
2017-06-29 19:01 ` [PATCH 16/37] binder: remove dead code in binder_get_ref_for_node Todd Kjos
2017-06-29 19:01 ` [PATCH 17/37] binder: protect against two threads freeing buffer Todd Kjos
2017-06-29 19:01 ` [PATCH 18/37] binder: add more debug info when allocation fails Todd Kjos
2017-06-29 19:01 ` [PATCH 19/37] binder: use atomic for transaction_log index Todd Kjos
2017-06-29 19:01 ` [PATCH 20/37] binder: refactor binder_pop_transaction Todd Kjos
2017-06-29 19:01 ` [PATCH 21/37] binder: guarantee txn complete / errors delivered in-order Todd Kjos
2017-06-29 19:01 ` [PATCH 22/37] binder: make sure target_node has strong ref Todd Kjos
2017-06-29 19:01 ` [PATCH 23/37] binder: make sure accesses to proc/thread are safe Todd Kjos
2017-06-29 19:01 ` [PATCH 24/37] binder: refactor binder ref inc/dec for thread safety Todd Kjos
2017-06-29 19:01 ` [PATCH 25/37] binder: use node->tmp_refs to ensure node safety Todd Kjos
2017-06-29 19:02 ` [PATCH 26/37] binder: introduce locking helper functions Todd Kjos
2017-06-29 19:02 ` [PATCH 27/37] binder: use inner lock to sync work dq and node counts Todd Kjos
2017-06-29 19:02 ` [PATCH 28/37] binder: add spinlocks to protect todo lists Todd Kjos
2017-06-29 19:02 ` [PATCH 29/37] binder: add spinlock to protect binder_node Todd Kjos
2017-06-29 19:02 ` [PATCH 30/37] binder: protect proc->nodes with inner lock Todd Kjos
2017-06-29 19:02 ` [PATCH 31/37] binder: protect proc->threads with inner_lock Todd Kjos
2017-06-29 19:02 ` [PATCH 32/37] binder: protect transaction_stack with inner lock Todd Kjos
2017-06-29 19:02 ` [PATCH 33/37] binder: use inner lock to protect thread accounting Todd Kjos
2017-06-29 19:02 ` [PATCH 34/37] binder: protect binder_ref with outer lock Todd Kjos
2017-06-29 19:02 ` [PATCH 35/37] binder: protect against stale pointers in print_binder_transaction Todd Kjos
2017-06-29 19:02 ` [PATCH 36/37] binder: fix death race conditions Todd Kjos
2017-06-30  6:05   ` Greg KH
2017-06-29 19:02 ` [PATCH 37/37] binder: remove global binder lock Todd Kjos
2017-06-30  6:04 ` [PATCH 00/37] fine-grained locking in binder driver Greg KH
2017-07-17 12:49   ` Greg KH

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