From: Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>
To: "Dr. Philipp Tomsich" <philipp.tomsich@theobroma-systems.com>
Cc: Martin Elshuber <martin.elshuber@theobroma-systems.com>,
Wolfgang Grandegger <wg@grandegger.com>,
Marc Kleine-Budde <mkl@pengutronix.de>,
linux-can@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 0/1] Open questions
Date: Tue, 13 Mar 2018 18:48:36 +0100 [thread overview]
Message-ID: <eb5c728a-e6c2-c610-47ca-a5b3f636a2fc@theobroma-systems.com> (raw)
In-Reply-To: <06378497-1ACE-4333-810F-4E3E4706CCD5@theobroma-systems.com>
On 13.03.18 18:42, Dr. Philipp Tomsich wrote:
>
>> On 13 Mar 2018, at 18:40, Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com> wrote:
>>
>>>> + /* get the urb context */
>>>> + if (WARN_ON(!context))
>>>> + return;
>>>
>>> Can this happen?
>>
>> Not unless there is a bug in the code. But we want to get a message
>> before dereferencing a pointer.
>
> Why not use BUG_ON(!context)?
I believe BUG_ON kills the kernel - the intention was to get loud
message, but we'd rather not crash the user's machine.
Best regards,
Jakob
next prev parent reply other threads:[~2018-03-13 17:48 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-13 17:35 [PATCH v2 0/1] can: ucan: add driver for Theobroma Systems UCAN devices Jakob Unterwurzacher
2018-03-13 17:35 ` [PATCH v2 1/1] " Jakob Unterwurzacher
2018-03-13 17:44 ` Marc Kleine-Budde
2018-03-13 17:53 ` Jakob Unterwurzacher
2018-03-13 17:56 ` Marc Kleine-Budde
2018-03-14 7:51 ` Marc Kleine-Budde
2018-03-14 9:09 ` Jakob Unterwurzacher
2018-03-14 9:36 ` rx_packets/bytes stats for error frames (was: Re: [PATCH v2 1/1] can: ucan: add driver for Theobroma Systems UCAN devices) Marc Kleine-Budde
2018-03-14 9:46 ` rx_packets/bytes stats for error frames Wolfgang Grandegger
2018-03-14 9:57 ` Jakob Unterwurzacher
2018-03-14 9:11 ` [PATCH v2 1/1] can: ucan: add driver for Theobroma Systems UCAN devices Wolfgang Grandegger
2018-03-14 9:14 ` Jakob Unterwurzacher
2018-03-14 9:17 ` Wolfgang Grandegger
2018-03-14 9:21 ` Jakob Unterwurzacher
2018-03-14 9:25 ` Wolfgang Grandegger
2018-03-14 9:48 ` Jakob Unterwurzacher
2018-03-14 10:04 ` Wolfgang Grandegger
2018-03-14 10:19 ` Jakob Unterwurzacher
2018-03-14 19:07 ` Jakob Unterwurzacher
2018-03-15 6:58 ` Wolfgang Grandegger
2018-03-16 7:01 ` kbuild test robot
2018-03-16 12:14 ` kbuild test robot
2018-03-13 17:40 ` [PATCH v2 0/1] Open questions Jakob Unterwurzacher
[not found] ` <06378497-1ACE-4333-810F-4E3E4706CCD5@theobroma-systems.com>
2018-03-13 17:48 ` Jakob Unterwurzacher [this message]
2018-03-13 17:48 ` Marc Kleine-Budde
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