linux-kernel - Re: [PATCH] drm/nouveau/disp: fix use-after-free in error handling of nouveau_connector

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Message-ID: <CACO55tt9ZLKjaTyARXQ4VePgd41nYCQBn+wAGGDJRw1QV3hPBQ@mail.gmail.com>
Date:   Thu, 17 Aug 2023 12:24:45 +0200
From:   Karol Herbst <kherbst@...hat.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     linux-kernel@...r.kernel.org, Ben Skeggs <bskeggs@...hat.com>,
        Lyude Paul <lyude@...hat.com>, dri-devel@...ts.freedesktop.org,
        nouveau@...ts.freedesktop.org, Takashi Iwai <tiwai@...e.de>
Subject: Re: [PATCH] drm/nouveau/disp: fix use-after-free in error handling of nouveau_connector_create

On Thu, Aug 17, 2023 at 12:11 PM Borislav Petkov <bp@...en8.de> wrote:
>
> On Thu, Aug 17, 2023 at 12:00:47PM +0200, Karol Herbst wrote:
> > btw, what would help is to know where `nvkm_uconn_uevent` actually
> > fails, or rather, are you running into this "/* TODO: support DP IRQ
> > on ANX9805 and remove this hack. */" condition?
>
> Send me a diff, I'll run it here and catch output over serial.
>

simply throw a

printk(KERN_WARNING "nvkm_uconn_uevent %u\n", outp->info.location);

inside drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c:104 after that
mentioned comment.

> Thx.
>
> --
> Regards/Gruss,
>     Boris.
>
> https://people.kernel.org/tglx/notes-about-netiquette
>