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 BA0BB3624CC; Sat, 12 Sep 2026 18:19:38 +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=1789237179; cv=none; b=RJd13cVZrgrd62swJDGRKGymxMnPGKnXIux3sbE66k57xA2c0yil+kenLZzN7Y/hAntA4qvXuEdZcEHcoiK1p6OWojjKASHimOr0fCvlt4IWunMBTstOyDUI0tWa9OIQj4/zDpS0Jnm2tkxZtJIZ36ajodZXhe6VqZzrOkUmNkg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789237179; c=relaxed/simple; bh=ou2qRgWxqSXb1aXekkYYnvnP74OC/oLJcTx7YKPdUzM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uE80yoEmLQjWX1JRPNbEhJDNFY/2BRYOG3EJk+rzNaQlfhc08FRz9ZVERmEaeJCIHlKVdKcsA6Y/5fu768qP6JP/ShEwipq/++trJp2YATip+H1PQdPLPncRmZRrjt2V2hYxABer3A7dx8S6bGVGYtdl46PdxEWAC3NoXsi25GE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=171wSNjd; 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="171wSNjd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5206B1F000FF; Sat, 12 Sep 2026 18:19:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789237178; bh=aj7BftHEzDU2GtYntKhXDPSeUuJXcGfHlrU7kdVUpS8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=171wSNjdSUS7QUGDmyck8mdd1UopissBijavqj7HQJXA3thv1EbASdKiGO4PoyF4h KSQStmL9AFQbev2ZOinlmHzcV0vsWyiFMREuPPqWLwC5t5WDlB9gz+/rI8h8fIhXWN ecS/hGsH6OU151J28yCf0omZU1fal6OuSTLTvSL0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stanislaw Gruszka , Ping-Ke Shih , stable@kernel.org Subject: [PATCH 5.15 205/935] wifi: rtl818x: initialize eeprom_93cx6 struct to zero Date: Sat, 12 Sep 2026 08:53:55 +0200 Message-ID: <20260912065531.521009722@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stanislaw Gruszka commit 799b5f45cb8194ebd06c9c89e0afdad5bedd2cc5 upstream. Commit 7738a7ab9d12 ("misc: eeprom: eeprom_93cx6: Add quirk for extra read clock cycle") added extra 'quirk' field to struct eeprom_93cx6. Many existing users of eeprom_93cx6, including rtl818x drivers, allocate the structure on the stack without initializing all fields. As a result, the added quirk field has an undefined value and can randomly cause reading wrong data from the EEPROM. Fix by initializing the structures with {}. Fixes: 7738a7ab9d12 ("misc: eeprom: eeprom_93cx6: Add quirk for extra read clock cycle") Cc: stable@kernel.org # v6.13+ Signed-off-by: Stanislaw Gruszka Reviewed-by: Ping-Ke Shih Signed-off-by: Ping-Ke Shih Link: https://patch.msgid.link/20260723110640.8588-1-stf_xl@wp.pl Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c | 2 +- drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c +++ b/drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c @@ -1646,7 +1646,7 @@ static void rtl8180_eeprom_register_writ static void rtl8180_eeprom_read(struct rtl8180_priv *priv) { - struct eeprom_93cx6 eeprom; + struct eeprom_93cx6 eeprom = {}; int eeprom_cck_table_adr; u16 eeprom_val; int i; --- a/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c +++ b/drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c @@ -1439,7 +1439,7 @@ static int rtl8187_probe(struct usb_inte struct usb_device *udev = interface_to_usbdev(intf); struct ieee80211_hw *dev; struct rtl8187_priv *priv; - struct eeprom_93cx6 eeprom; + struct eeprom_93cx6 eeprom = {}; struct ieee80211_channel *channel; const char *chip_name; u16 txpwr, reg;