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 2E2561DB54C for ; Mon, 3 Nov 2025 00:50:19 +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=1762131020; cv=none; b=dTftJSNu5GrzfYpkfiRVHf+oJ7iPxkD6mcdDgewQfvInQ7Ii3qOuCv4o+gWX6DfMQzKy2TSnkxeDFEx+iLGWL8fvpNPYX8KYAFH3bgCBAn0g50MWQ31r9IJfvukNfwAimgLz4M4DqKJ9twcTtSkUHiIQZYpy6kaXuUmiPuSCUAU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762131020; c=relaxed/simple; bh=51D+u2AtDz8CfOYBxJ9tf+OJttcfvfUXkKh4sHEKbdE=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=ez3no2ROLHGDinQemzIHeD+4Bu9/YuwpeuFa6BRaOkxDC5DXCc2fCUBvrMtE0vlPiKROKAqTS/apAIztDI6BX6EJI+90H/62agAgKNRlR8en9ImGOcljEXKEdRaHHpMXn/0BdGLU+qARuowDyjxVwhlBSFSmPrcT/4T2OJkJYcc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Fmo5yhst; 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="Fmo5yhst" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55979C4CEF7; Mon, 3 Nov 2025 00:50:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1762131019; bh=51D+u2AtDz8CfOYBxJ9tf+OJttcfvfUXkKh4sHEKbdE=; h=Subject:To:Cc:From:Date:From; b=Fmo5yhstdJMT9KX+4C024uL2bYShWF6BN99ZQgk9y8RBHDS29prpfQEJ7H41Gugyo jsK9x1Ue6LFRo9OSaZiXUmWTbgF8XkBBVVl0ir/CMNd+V/yND//GyBXdn9rL5LQoq8 H+aJhKsX/XihYVlCkKoV48LQ07+4gxGzLGtlhMEY= Subject: FAILED: patch "[PATCH] drm/sysfb: Do not dereference NULL pointer in plane reset" failed to apply to 5.15-stable tree To: tzimmermann@suse.de,airlied@gmail.com,dan.carpenter@linaro.org,javierm@redhat.com,maarten.lankhorst@linux.intel.com,melissa.srw@gmail.com,mripard@kernel.org,simona@ffwll.ch,stable@vger.kernel.org Cc: From: Date: Mon, 03 Nov 2025 09:50:14 +0900 Message-ID: <2025110314-plank-canned-8743@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 14e02ed3876f4ab0ed6d3f41972175f8b8df3d70 # git commit -s git send-email --to '' --in-reply-to '2025110314-plank-canned-8743@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 14e02ed3876f4ab0ed6d3f41972175f8b8df3d70 Mon Sep 17 00:00:00 2001 From: Thomas Zimmermann Date: Fri, 17 Oct 2025 11:13:36 +0200 Subject: [PATCH] drm/sysfb: Do not dereference NULL pointer in plane reset The plane state in __drm_gem_reset_shadow_plane() can be NULL. Do not deref that pointer, but forward NULL to the other plane-reset helpers. Clears plane->state to NULL. v2: - fix typo in commit description (Javier) Signed-off-by: Thomas Zimmermann Fixes: b71565022031 ("drm/gem: Export implementation of shadow-plane helpers") Reported-by: Dan Carpenter Closes: https://lore.kernel.org/dri-devel/aPIDAsHIUHp_qSW4@stanley.mountain/ Cc: Thomas Zimmermann Cc: Melissa Wen Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: David Airlie Cc: Simona Vetter Cc: dri-devel@lists.freedesktop.org Cc: # v5.15+ Reviewed-by: Javier Martinez Canillas Link: https://patch.msgid.link/20251017091407.58488-1-tzimmermann@suse.de diff --git a/drivers/gpu/drm/drm_gem_atomic_helper.c b/drivers/gpu/drm/drm_gem_atomic_helper.c index ebf305fb24f0..6fb55601252f 100644 --- a/drivers/gpu/drm/drm_gem_atomic_helper.c +++ b/drivers/gpu/drm/drm_gem_atomic_helper.c @@ -310,8 +310,12 @@ EXPORT_SYMBOL(drm_gem_destroy_shadow_plane_state); void __drm_gem_reset_shadow_plane(struct drm_plane *plane, struct drm_shadow_plane_state *shadow_plane_state) { - __drm_atomic_helper_plane_reset(plane, &shadow_plane_state->base); - drm_format_conv_state_init(&shadow_plane_state->fmtcnv_state); + if (shadow_plane_state) { + __drm_atomic_helper_plane_reset(plane, &shadow_plane_state->base); + drm_format_conv_state_init(&shadow_plane_state->fmtcnv_state); + } else { + __drm_atomic_helper_plane_reset(plane, NULL); + } } EXPORT_SYMBOL(__drm_gem_reset_shadow_plane);