From patchwork Thu May 30 14:57:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastien Nocera X-Patchwork-Id: 13680508 Received: from relay7-d.mail.gandi.net (relay7-d.mail.gandi.net [217.70.183.200]) (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 6AE5C1E89A for ; Thu, 30 May 2024 15:01:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.200 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717081262; cv=none; b=RTwcmjmfKXculQj5qrYzu0cAzIuvXAysIeIiiRTu4k05uiiDcHRF+sz+SDL/zQWE9d4HBvwyAOHwlDOWM2eZ7xEa0fnlCft8KSMYUkVj6MAuYEMhxKqapMZpM7OKjkWAZQSeZ5/zfmSivIeyqyi1J3cW1XSho1Ey9248xEPxsBo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717081262; c=relaxed/simple; bh=YdhSO3QIYKxHiPHW4z302UhfJABUeFRJ4d58sXWWM6k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ncaMSI0s4eawBXnUFiNJYCSBcEIN4gge8FHvNNZcDHCswc0tTWIKA/oUdwQDGPKK4b6FPA6WYcu2TzZRFfg0QXGah9cV8d26ZOPoJrkvG776bm1zVuXzGhGUQ8SYIkjiGpDGFROGOBkbuWcOTasJhZ6vK/unYNExtyr3J6TFbf8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=hadess.net; spf=pass smtp.mailfrom=hadess.net; arc=none smtp.client-ip=217.70.183.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=hadess.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=hadess.net Received: by mail.gandi.net (Postfix) with ESMTPSA id 938CA20012; Thu, 30 May 2024 15:00:58 +0000 (UTC) From: Bastien Nocera To: linux-bluetooth@vger.kernel.org Cc: Bastien Nocera Subject: [BlueZ 3/9] l2test: Add missing error checking Date: Thu, 30 May 2024 16:57:57 +0200 Message-ID: <20240530150057.444585-4-hadess@hadess.net> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240530150057.444585-1-hadess@hadess.net> References: <20240530150057.444585-1-hadess@hadess.net> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: hadess@hadess.net send() might fail and return a negative len, catch that to avoid advancing the send buffer in the wrong direction and causing all sorts of problems. 977|-> len = send(sk, buf + sent, buflen, 0); 978| 979| sent += len; --- tools/l2test.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/l2test.c b/tools/l2test.c index 011a68c3781e..7b6c36e165da 100644 --- a/tools/l2test.c +++ b/tools/l2test.c @@ -975,6 +975,11 @@ static void do_send(int sk) buflen = (size > omtu) ? omtu : size; len = send(sk, buf + sent, buflen, 0); + if (len < 0) { + syslog(LOG_ERR, "Send failed: %s (%d)", + strerror(errno), errno); + exit(1); + } sent += len; size -= len;