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 426333E3C78 for ; Fri, 15 May 2026 07:23:38 +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=1778829818; cv=none; b=LGNWgkL80+58IgIQII9ZR2bk+b8NlS4aNkB5ZNiot1EwyZpqGF2Mg+/RBw4hVTnG4UzM7CekZtwTncQF7NmsNI+yi0TsFD895ycIIi1hjw2TRe9LrEspoYnU3utTR3qfTbOe8F6IsmbjRW6p0e8gv+J1dG7GIA1Ig9/xCrpz+7Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778829818; c=relaxed/simple; bh=eO7WOEbToiqGgfOQSOqVQ+EssLDGuOT8HmEUrmjO7xU=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=oNR5zQoBp+Yenf8u9x7h5EikD9n8B4ndVjZRPTszWk+l5dTJDR/xGaCEOT+kUAxlEX7XMpCwW4T16hIquC26SeYzGHxmpTaYjskXQUIqRC9EDgwrR0pavJyXvuCajuxCworrfCUHesmRCjazh1h+3VFpqe05TfjaSkgq/Mq1S8Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UZREnFIQ; 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="UZREnFIQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CD5A2C2BCB0; Fri, 15 May 2026 07:23:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778829818; bh=eO7WOEbToiqGgfOQSOqVQ+EssLDGuOT8HmEUrmjO7xU=; h=Subject:To:Cc:From:Date:From; b=UZREnFIQLrSMDbN8T6IXO791g+ZFshtVmLYUZoAKoJXIK+PvfAGUMZmoz1nIzSVGR TPUrCFnpJiMvljkBuZV4lZuMR8TdyONxTTJvo14irlMkrvF3pnlVvoDPAF3BvR/bsF e5clKqWomxfPE7Or68m//mi/3RtPfjY5YVcR6Xj4= Subject: FAILED: patch "[PATCH] drm/xe/hdcp: Add NULL check for media_gt in" failed to apply to 6.18-stable tree To: gustavo.sousa@intel.com,matthew.brost@intel.com,matthew.d.roper@intel.com,shuicheng.lin@intel.com,stable@vger.kernel.org Cc: From: Date: Fri, 15 May 2026 09:23:42 +0200 Message-ID: <2026051542-traps-bubbling-c3d7@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 6.18-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-6.18.y git checkout FETCH_HEAD git cherry-pick -x 60a1e131a811b68703da58fd805ab359b704ab03 # git commit -s git send-email --to '' --in-reply-to '2026051542-traps-bubbling-c3d7@gregkh' --subject-prefix 'PATCH 6.18.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 60a1e131a811b68703da58fd805ab359b704ab03 Mon Sep 17 00:00:00 2001 From: Gustavo Sousa Date: Thu, 16 Apr 2026 15:17:19 -0300 Subject: [PATCH] drm/xe/hdcp: Add NULL check for media_gt in intel_hdcp_gsc_check_status() When media GT is disabled via configfs, there is no allocation for media_gt, which is kept as NULL. In such scenario, intel_hdcp_gsc_check_status() results in a kernel pagefault error due to >->uc.gsc being evaluated as an invalid memory address. Fix that by introducing a NULL check on media_gt and bailing out early if so. While at it, also drop the NULL check for gsc, since it can't be NULL if media_gt is not NULL. v2: - Get address for gsc only after checking that gt is not NULL. (Shuicheng) - Drop the NULL check for gsc. (Shuicheng) v3: - Add "Fixes" and "Cc: " tags. (Matt) Fixes: 4af50beb4e0f ("drm/xe: Use gsc_proxy_init_done to check proxy status") Cc: # v6.10+ Reviewed-by: Matt Roper Reviewed-by: Shuicheng Lin Link: https://patch.msgid.link/20260416-check-for-null-media_gt-in-intel_hdcp_gsc_check_status-v2-1-9adb9fd3b621@intel.com Signed-off-by: Gustavo Sousa (cherry picked from commit bfaf87e84ca3ca3f6e275f9ae56da47a8b55ffd1) Signed-off-by: Matthew Brost diff --git a/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c b/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c index 29c72aa4b0d2..33494b86205d 100644 --- a/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c +++ b/drivers/gpu/drm/xe/display/xe_hdcp_gsc.c @@ -37,9 +37,17 @@ static bool intel_hdcp_gsc_check_status(struct drm_device *drm) struct xe_device *xe = to_xe_device(drm); struct xe_tile *tile = xe_device_get_root_tile(xe); struct xe_gt *gt = tile->media_gt; - struct xe_gsc *gsc = >->uc.gsc; + struct xe_gsc *gsc; - if (!gsc || !xe_uc_fw_is_available(&gsc->fw)) { + if (!gt) { + drm_dbg_kms(&xe->drm, + "not checking GSC status for HDCP2.x: media GT not present or disabled\n"); + return false; + } + + gsc = >->uc.gsc; + + if (!xe_uc_fw_is_available(&gsc->fw)) { drm_dbg_kms(&xe->drm, "GSC Components not ready for HDCP2.x\n"); return false;