From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B74113EDE68; Tue, 12 May 2026 18:07:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778609223; cv=none; b=bft5LodO0Q/tKDaarMceCXzcRN8TfRnBYag02oUEUZ8Rdp0O+MMgPNgQHAiR1AHhgdIox3JJQonR8Fd3JDRATH4jks5Wc+ivZchOaiz09otgzeZ7xYOpHhcNNWlv1aUhvPpHOqSznAR0T509EOLwS5PU1ZYWy19em4wwHxaCojE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778609223; c=relaxed/simple; bh=OF6aZdluqDOBB9hXJzpXJ44pldrtpIr8zL09yusxy6U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=c6KcXyOXHNfTclgL5Wt84t0b3caNgakSs1cTrJCuIkJTncBnlHULWUXWmuVMkAPjWJMxZdSY+VGR2G0NYrxFhZmrx/ufNLbRgoVjnPDcxLxch5T37s5WYNSb19GnhYFGAboNEdFOeXZlBJoUMfM9uiQ6C4M2ifIEYy/sI7IAjg4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=kBFrXBa2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="kBFrXBa2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1E10DC2BCB0; Tue, 12 May 2026 18:07:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778609223; bh=OF6aZdluqDOBB9hXJzpXJ44pldrtpIr8zL09yusxy6U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kBFrXBa2vSFi887S/k3r9ILWmGJdAEBGOnnh6IkzAv2cgDB9tPMtysMBdWlJvxBEv u7KuDeugEkJkEF4SB65DAAMeqmNpLYHKqMF8HrzJlKdPCLTyhrPqP5WFUkp/CJKd+3 bjhRd3ZbwCyZwGbFPlTuCfWioSErrGpWBH8iAPJk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yametsu , Andrzej Kacprowski , Karol Wachowski Subject: [PATCH 7.0 110/307] accel/ivpu: Disallow re-exporting imported GEM objects Date: Tue, 12 May 2026 19:38:25 +0200 Message-ID: <20260512173942.445935254@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260512173940.117428952@linuxfoundation.org> References: <20260512173940.117428952@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Karol Wachowski commit 7dd57d7a6350770dfc283287125c409e995200e0 upstream. Prevent re-exporting of imported GEM buffers by adding a custom prime_handle_to_fd callback that checks if the object is imported and returns -EOPNOTSUPP if so. Re-exporting imported GEM buffers causes loss of buffer flags settings, leading to incorrect device access and data corruption. Reported-by: Yametsu Fixes: 57557964b582 ("accel/ivpu: Add support for userptr buffer objects") Reviewed-by: Andrzej Kacprowski Signed-off-by: Karol Wachowski Cc: # v6.19+ Signed-off-by: Greg Kroah-Hartman --- drivers/accel/ivpu/ivpu_drv.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) --- a/drivers/accel/ivpu/ivpu_drv.c +++ b/drivers/accel/ivpu/ivpu_drv.c @@ -460,6 +460,26 @@ static const struct file_operations ivpu #endif }; +static int ivpu_gem_prime_handle_to_fd(struct drm_device *dev, struct drm_file *file_priv, + u32 handle, u32 flags, int *prime_fd) +{ + struct drm_gem_object *obj; + + obj = drm_gem_object_lookup(file_priv, handle); + if (!obj) + return -ENOENT; + + if (drm_gem_is_imported(obj)) { + /* Do not allow re-exporting */ + drm_gem_object_put(obj); + return -EOPNOTSUPP; + } + + drm_gem_object_put(obj); + + return drm_gem_prime_handle_to_fd(dev, file_priv, handle, flags, prime_fd); +} + static const struct drm_driver driver = { .driver_features = DRIVER_GEM | DRIVER_COMPUTE_ACCEL, @@ -468,6 +488,7 @@ static const struct drm_driver driver = .gem_create_object = ivpu_gem_create_object, .gem_prime_import = ivpu_gem_prime_import, + .prime_handle_to_fd = ivpu_gem_prime_handle_to_fd, .ioctls = ivpu_drm_ioctls, .num_ioctls = ARRAY_SIZE(ivpu_drm_ioctls),