From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 654042D7386; Wed, 20 May 2026 18:32:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779301965; cv=none; b=qicrEVU/Ks8Lop8L47AFLr0CSgkX23KAdVJfRqSQB9R3wc37YvIf9IpyK7qyMFtQIWDPo+F0qPWoe1hpxzE1JodaBdJFVSpgjrg0mnqjK18i5OS6wx6D54NqVQeksU+tRlVsHm9x9LDensom2oaMXSz6fKtObOVUpG5Z2I7tP4Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779301965; c=relaxed/simple; bh=cv4vzI+RC5DaQJE25PQrp5YtXm0CVyFIXhhvliKaG90=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jZapo20Sbmn4U/nm+Rkn0k/DvLFj47ABv6G8rUg+8uxFsXq6odKfwJDys/l7skhbZVkZvodhLhQdV0A/Re6ecVqKVp+0wjWZGzL0Txgvh6bZ4kHSs/uprcY30dAxn4dDV3Sm2Xay1LGHMy/UyKLjE66UilVtCxbGgmt244rU18M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PKpq6IcV; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="PKpq6IcV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA7BF1F000E9; Wed, 20 May 2026 18:32:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1779301964; bh=QzvbhjSoj94qXSvArTBywkk5h9aotRk/VZTglCTzUjc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PKpq6IcV6G8f6eJe/tCEiivVG7Fo5kVF/tKp4tDzcfVQ3VNxS7D2fkFzw+c++5ZS8 WO/aHrv74VBTwY6yTId9gYsq93kVoYGPqWLnUH765sqrHk9xgpQn+hpIR/Ff+80S2h WYFc6CHblC5ZaInU1t7krMzF6kH8f7sEQBi0Ulww= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ethan Tidmore , Chen-Yu Tsai , Sasha Levin Subject: [PATCH 6.6 088/508] drm/sun4i: backend: fix error pointer dereference Date: Wed, 20 May 2026 18:18:31 +0200 Message-ID: <20260520162100.520029821@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260520162058.573354582@linuxfoundation.org> References: <20260520162058.573354582@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ethan Tidmore [ Upstream commit 06277983eca4a31d3c2114fa33d99a6e82484b11 ] The function drm_atomic_get_plane_state() can return an error pointer and is not checked for it. Add error pointer check. Detected by Smatch: drivers/gpu/drm/sun4i/sun4i_backend.c:496 sun4i_backend_atomic_check() error: 'plane_state' dereferencing possible ERR_PTR() Fixes: 96180dde23b79 ("drm/sun4i: backend: Add a custom atomic_check for the frontend") Signed-off-by: Ethan Tidmore Reviewed-by: Chen-Yu Tsai Link: https://patch.msgid.link/20260217014801.60760-1-ethantidmore06@gmail.com Signed-off-by: Chen-Yu Tsai Signed-off-by: Sasha Levin --- drivers/gpu/drm/sun4i/sun4i_backend.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c index 335fd0edb904c..6a2ffaa477ab8 100644 --- a/drivers/gpu/drm/sun4i/sun4i_backend.c +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c @@ -488,6 +488,9 @@ static int sun4i_backend_atomic_check(struct sunxi_engine *engine, drm_for_each_plane_mask(plane, drm, crtc_state->plane_mask) { struct drm_plane_state *plane_state = drm_atomic_get_plane_state(state, plane); + if (IS_ERR(plane_state)) + return PTR_ERR(plane_state); + struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(plane_state); struct drm_framebuffer *fb = plane_state->fb; -- 2.53.0