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 6DC0A1C31 for ; Wed, 23 Nov 2022 09:50:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC008C433D7; Wed, 23 Nov 2022 09:50:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1669197048; bh=p1uLgSVqztVqCqfj2kFE2qwQ5TmyRCQNvq1V4eSlrVo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a8piXL7J23/Ov1Ys3A60svry8ufL77ytteHYZBLJlMFDDXL+Wwu18gOSrSSnLmLLK 23ZM2PNig+kSB/nFWfjda3YEtwxcbU/gl7tn5yA5X/rPSGZ6n4LwmGzJwOQNFznPzh pJNyN9OPu2v29mTGRLg/8hZJSRkNPwa2OCB6XdRI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wei Yongjun , Martin Schiller , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.0 184/314] net/x25: Fix skb leak in x25_lapb_receive_frame() Date: Wed, 23 Nov 2022 09:50:29 +0100 Message-Id: <20221123084633.905106879@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221123084625.457073469@linuxfoundation.org> References: <20221123084625.457073469@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Wei Yongjun [ Upstream commit 2929cceb2fcf0ded7182562e4888afafece82cce ] x25_lapb_receive_frame() using skb_copy() to get a private copy of skb, the new skb should be freed in the undersized/fragmented skb error handling path. Otherwise there is a memory leak. Fixes: cb101ed2c3c7 ("x25: Handle undersized/fragmented skbs") Signed-off-by: Wei Yongjun Acked-by: Martin Schiller Link: https://lore.kernel.org/r/20221114110519.514538-1-weiyongjun@huaweicloud.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/x25/x25_dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/x25/x25_dev.c b/net/x25/x25_dev.c index 5259ef8f5242..748d8630ab58 100644 --- a/net/x25/x25_dev.c +++ b/net/x25/x25_dev.c @@ -117,7 +117,7 @@ int x25_lapb_receive_frame(struct sk_buff *skb, struct net_device *dev, if (!pskb_may_pull(skb, 1)) { x25_neigh_put(nb); - return 0; + goto drop; } switch (skb->data[0]) { -- 2.35.1