From: Thierry Reding <thierry.reding@kernel.org>
To: Mikko Perttunen <mperttunen@nvidia.com>
Cc: Thierry Reding <thierry.reding@gmail.com>,
David Airlie <airlied@gmail.com>,
Simona Vetter <simona@ffwll.ch>,
dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org, Dan Carpenter <error27@gmail.com>
Subject: Re: [PATCH] gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings
Date: Thu, 16 Jul 2026 20:27:12 +0200 [thread overview]
Message-ID: <alkidFSX2nTsQviG@orome> (raw)
In-Reply-To: <20260603-host1x-bocache-leak-fix-v1-1-494101dbfd30@nvidia.com>
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On Wed, Jun 03, 2026 at 05:37:49PM +0900, Mikko Perttunen wrote:
> __host1x_bo_unpin() drops the last reference to the mapping and frees
> it, so we can't dereference mapping afterwards. The cache itself
> outlives the mapping, so use the cache local variable instead.
>
> Reported-by: Dan Carpenter <error27@gmail.com>
> Closes: https://lore.kernel.org/linux-tegra/ah6ErK6f4kVudVIA@stanley.mountain/T/#u
> Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
> ---
> This is a fix for the commit
>
> 'gpu: host1x: Allow entries in BO caches to be freed'
>
> that has already been applied by Thierry.
> ---
> drivers/gpu/host1x/bus.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
Applied to drm-misc-fixes, thanks.
Thierry
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prev parent reply other threads:[~2026-07-16 18:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-03 8:37 [PATCH] gpu: host1x: Fix use-after-free in host1x_bo_clear_cached_mappings Mikko Perttunen
2026-07-16 18:27 ` Thierry Reding [this message]
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