From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793214031; b=P/b/RKG4PDv0ybiMQFN08e4XC/hT70o/Z2qH5MKpE5E/3UnViVbtrmMxWzHhkFKLOkkM fdPtfLtFq2FLajXv/S++lKg+KoBV8qnW3OxhGl1vTHoXwF8vBguPKMncwY3Ypgo8jcsMd 0vHLzfZ2YZY8iMZ5kDzdJ/hV+4rDKZHOlH+qbnjUFWfVEmumRMMQFvslk+mIn012r0i2u 0EvNiK5hyW+zUtoeOxOv8RTezRWUD/21Or+1E1/CJxv34kJefl61N8cKmg37cohCKkWAE WXUGpvey6DBEW5gMJyDulhXEQ/sIdc5GoqUjZrSVtvGpeU1xRwiusnFUYh0DMBWuDVQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793214031; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=HSXIjuBz1oEIkpdK92E+5aFSz/lXgQMOmMGpuN8udOA=; b=CQTlLgBP4dHBeBoSYuR4CN9hmtCuxnBVgUbLMbMrFgA9s3q0zdgif0niOhpKAdP2BB8Y Ze/7p+bXvuYUOwGo6nGAik9s7kyawXa+yNiYRhfxDwhnrqB7nZLTcs4XUeS1ek4eJEwL9 EaQQpudOnn6jzRV46vR+6ci+iBBNAoiQZuMVquwHWDKiKhuaKzYT8yKDLBAUqkBY2Ta1D Zzi9HNLHjB0MFQxQJoPqmi8Q+FUDdGYFlSG9qZVbiRZsqk9swbUnbcnwb30A0hllDhRPx lsKULUNRWXRKgHANWNoumJjHRH4mx5zyCRVFiII5wJQUp1yS2VcF2AvvLDm8rfOGQ0Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=e0Y1SUTh; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2ED160A381B; Wed, 28 Oct 2026 19:00:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=e0Y1SUTh Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0E4311F01828; Wed, 28 Oct 2026 19:00:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793214014; bh=HSXIjuBz1oEIkpdK92E+5aFSz/lXgQMOmMGpuN8udOA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=e0Y1SUThKWTPWB96xBhcCZr3+xH3KpkWuiOr1AOxDWmz4ZiWH/FQydgzkxsw2PK3d 9tqkMtPxMdAjNvkUUmbyT02fxWKXj+eCWhROb43Sbr3SDkTRZwaZixqzntqc4shUpA 8GiXndbJHKQ5UbtOYMPy/WVz+rasIH++G0Sblbcg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Rodrigo Siqueira , Jerry Zuo , Alex Hung , Daniel Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 6.1 0672/1887] drm/amd/display: Check null pointers before using them Date: Wed, 28 Oct 2026 17:46:08 +0100 Message-ID: <20261028170514.704516981@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170459.200466217@linuxfoundation.org> References: <20261028170459.200466217@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Hung [ Upstream commit 1ff12bcd7deaeed25efb5120433c6a45dd5504a8 ] [WHAT & HOW] These pointers are null checked previously in the same function, indicating they might be null as reported by Coverity. As a result, they need to be checked when used again. This fixes 3 FORWARD_NULL issue reported by Coverity. Reviewed-by: Rodrigo Siqueira Signed-off-by: Jerry Zuo Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 53ec5f3a8e6f3..14f2cfcba5f65 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -8628,9 +8628,10 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state) DRM_INFO("[HDCP_DM] hdcp_update_display enable_encryption = %x\n", enable_encryption); - hdcp_update_display( - adev->dm.hdcp_workqueue, aconnector->dc_link->link_index, aconnector, - new_con_state->hdcp_content_type, enable_encryption); + if (aconnector->dc_link) + hdcp_update_display( + adev->dm.hdcp_workqueue, aconnector->dc_link->link_index, aconnector, + new_con_state->hdcp_content_type, enable_encryption); } } #endif -- 2.53.0