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 E102C22424C; Tue, 8 Apr 2025 11:40:33 +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=1744112434; cv=none; b=DI9RvQLc9zTj9jP5flr1sBZ7z4AdkiPHOkhUat14tHVwqnY+h4tUkuddZoDVU16sO1DHhm+dOwe80BSM1O0MPLamThPN/GbStDFdt7ZuK5K1DRPRfV6r/QnENGVhG5f14qLv2STgULcWJDJkwANRBejoTuinCyXQFXltfGVd6rA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744112434; c=relaxed/simple; bh=EEueIMvJnGT75uzv7AiJsm5k0rK/v9P/JRIkgdXaUAk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=V6Gnv1MxeZ74b+1brR6+ASPTxfvqmT9KRdeqMUY3ueD/3q1E0fhOaVdsQuH29nNJYRuE7J1YGUFknqKP76QxQU/n/z5VSpWk0cCBEGQ7ltEoYnoUs0uUVjjapaZGnvt7nlu6FdnZAT21NMWMCO40ESnb4d3rXEMZ3B0r6lxKocU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=GqiXIZ3T; 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="GqiXIZ3T" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73624C4CEE5; Tue, 8 Apr 2025 11:40:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1744112433; bh=EEueIMvJnGT75uzv7AiJsm5k0rK/v9P/JRIkgdXaUAk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GqiXIZ3THQs0XE9wImmv/n6LTv949gTNrdDFVZ+UtWqy+aRrGaJ5uYYxiIi3JRGdM nmHIyrd4tGYAClT2Qclj4lUmBJPMuOZBrhrLapkJl//txpjfmA9IesJF280Y0m0xxW MhipiF71ZZwvqoioE43cHxzOUZK9RGp11Yzfhtek= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ivan Abramov , Patrik Jakobsson , Sasha Levin Subject: [PATCH 5.15 066/279] drm/gma500: Add NULL check for pci_gfx_root in mid_get_vbt_data() Date: Tue, 8 Apr 2025 12:47:29 +0200 Message-ID: <20250408104828.122979018@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250408104826.319283234@linuxfoundation.org> References: <20250408104826.319283234@linuxfoundation.org> User-Agent: quilt/0.68 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ivan Abramov [ Upstream commit 9af152dcf1a06f589f44a74da4ad67e365d4db9a ] Since pci_get_domain_bus_and_slot() can return NULL, add NULL check for pci_gfx_root in the mid_get_vbt_data(). This change is similar to the checks implemented in mid_get_fuse_settings() and mid_get_pci_revID(), which were introduced by commit 0cecdd818cd7 ("gma500: Final enables for Oaktrail") as "additional minor bulletproofing". Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: f910b411053f ("gma500: Add the glue to the various BIOS and firmware interfaces") Signed-off-by: Ivan Abramov Signed-off-by: Patrik Jakobsson Link: https://patchwork.freedesktop.org/patch/msgid/20250306112046.17144-1-i.abramov@mt-integration.ru Signed-off-by: Sasha Levin --- drivers/gpu/drm/gma500/mid_bios.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/gma500/mid_bios.c b/drivers/gpu/drm/gma500/mid_bios.c index 68e787924ed04..1ba33f9518da2 100644 --- a/drivers/gpu/drm/gma500/mid_bios.c +++ b/drivers/gpu/drm/gma500/mid_bios.c @@ -280,6 +280,11 @@ static void mid_get_vbt_data(struct drm_psb_private *dev_priv) 0, PCI_DEVFN(2, 0)); int ret = -1; + if (pci_gfx_root == NULL) { + WARN_ON(1); + return; + } + /* Get the address of the platform config vbt */ pci_read_config_dword(pci_gfx_root, 0xFC, &addr); pci_dev_put(pci_gfx_root); -- 2.39.5