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 CBC5EDDC1; Tue, 27 Aug 2024 14:46:32 +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=1724769992; cv=none; b=FGz7+xB+PuXvbGSAia0c8x2ke3wqgZI3Bfb+fZvkAGSbV2lNjnsBq8gqzY9EqL21XczUcEto0vQIp94G/8hvbLF+dfYkG1hWFNwhwzSK6WFQkwG6aX1zgdZ0S7xhyHg3gGq+DaoNKb94JIZf8FnEVF0Jjd11rKcSjbmTAtmUI8A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724769992; c=relaxed/simple; bh=s+R7ASurKyZcvNlN00I5KtnMANAUImekWb7DfikpPdw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LrHs4JU03YInB1xqBr+XPewd696Sg8dvFY/vLiklinlnIRdMPS/hwrgc5ROKgiMhNiLJyjXD9Xx/Am4x7IIWmwOuwL5WaUFh4ugZjTs1kletX1VJHkWkGKOpB4iLpnacnUzrsrpmYTgRevdf8UPgBjAKojkOgTJk7hf3aV4xeLE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tPNWcFIG; 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="tPNWcFIG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4E0D5C6106D; Tue, 27 Aug 2024 14:46:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1724769992; bh=s+R7ASurKyZcvNlN00I5KtnMANAUImekWb7DfikpPdw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tPNWcFIGuGvfcdXD6yn7mAv4x07QQdQjtWS7C0TH9vTNlcI9Ii4debZaMWZIzqL49 vrL173xfGMzYFKJvpaF+txC0qY0inunWWC91j1e7MdLtuMW5odHlkL8Fz09Mlt8wkm ItmiMC4B0n81n7zw8mhAEgHRrDSueS6bAshRsN6Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jeff Johnson , Kalle Valo , Sasha Levin Subject: [PATCH 6.6 096/341] wifi: cw1200: Avoid processing an invalid TIM IE Date: Tue, 27 Aug 2024 16:35:27 +0200 Message-ID: <20240827143847.060859024@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240827143843.399359062@linuxfoundation.org> References: <20240827143843.399359062@linuxfoundation.org> User-Agent: quilt/0.67 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jeff Johnson [ Upstream commit b7bcea9c27b3d87b54075735c870500123582145 ] While converting struct ieee80211_tim_ie::virtual_map to be a flexible array it was observed that the TIM IE processing in cw1200_rx_cb() could potentially process a malformed IE in a manner that could result in a buffer over-read. Add logic to verify that the TIM IE length is large enough to hold a valid TIM payload before processing it. Signed-off-by: Jeff Johnson Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20230831-ieee80211_tim_ie-v3-1-e10ff584ab5d@quicinc.com Signed-off-by: Sasha Levin --- drivers/net/wireless/st/cw1200/txrx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/st/cw1200/txrx.c b/drivers/net/wireless/st/cw1200/txrx.c index 6894b919ff94b..e16e9ae90d204 100644 --- a/drivers/net/wireless/st/cw1200/txrx.c +++ b/drivers/net/wireless/st/cw1200/txrx.c @@ -1166,7 +1166,7 @@ void cw1200_rx_cb(struct cw1200_common *priv, size_t ies_len = skb->len - (ies - (u8 *)(skb->data)); tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies, ies_len); - if (tim_ie) { + if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) { struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *)&tim_ie[2]; -- 2.43.0