From: Tom Rini <trini@konsulko.com>
To: u-boot@lists.denx.de
Subject: [PATCH v2 2/2] console: Don't start/stop console if stdio device invalid
Date: Mon, 1 Feb 2021 14:29:13 -0500 [thread overview]
Message-ID: <20210201192913.GE7199@bill-the-cat> (raw)
In-Reply-To: <82a72727-e601-25bf-24d5-41f77ff769b0@suse.com>
On Fri, Jan 29, 2021 at 09:50:50AM +0100, Matthias Brugger wrote:
>
>
> On 28/01/2021 16:52, Andy Shevchenko wrote:
> > On Thu, Jan 28, 2021 at 02:12:40PM +0100, Nicolas Saenz Julienne wrote:
> >> Don't start/stop an stdio device that might have been already freed.
> >>
> >> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> >> Fixes: 70c2525c0d3c ("IOMUX: Stop dropped consoles")
> >
> > ...
> >
> >> + /*
> >> + * TODO: This is a workaround to avoid accessing freed memory:
> >> + * console_stop() might be called on an stdio_dev that has already been
> >> + * de-registered, due to the fact that stdio_deregister_dev()
> >> + * doesn't update the global console_devices array.
> >> + */
> >
> > I see now. I think I have experienced this issue from time to time. I will look
> > at it. Tom, Simon, please hold on applying these for a while.
> >
>
> Just for the notes, the failing tests hold back Nicolas series to support
> RPi400/CM4 [1] as it does not run the new tests added successfully. If it takes
> a long time to fix the test environment, I'd vote to take this series as a
> stop-gap so that we can support that HW in the next release.
Andy, since you're working on a better solution, do you want more time
for that or should I pick this series up for now and you can revert it
as part of your better fix? Thanks!
--
Tom
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next prev parent reply other threads:[~2021-02-01 19:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-28 13:12 [PATCH v2 0/2] Console/stdio use after free Nicolas Saenz Julienne
2021-01-28 13:12 ` [PATCH v2 1/2] stdio: Introduce stdio_valid() Nicolas Saenz Julienne
2021-02-01 20:43 ` Simon Glass
2021-01-28 13:12 ` [PATCH v2 2/2] console: Don't start/stop console if stdio device invalid Nicolas Saenz Julienne
2021-01-28 15:52 ` Andy Shevchenko
2021-01-29 8:50 ` Matthias Brugger
2021-02-01 19:29 ` Tom Rini [this message]
2021-02-03 9:50 ` Andy Shevchenko
2021-02-05 17:06 ` Andy Shevchenko
2021-02-05 17:50 ` Tom Rini
2021-02-05 18:07 ` Tom Rini
2021-02-05 19:31 ` Andy Shevchenko
2021-02-05 20:47 ` Tom Rini
2021-02-01 20:18 ` Simon Glass
2021-01-28 16:55 ` [PATCH v2 0/2] Console/stdio use after free Andy Shevchenko
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