From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2040D1E521E for ; Wed, 24 Sep 2025 04:41:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758688908; cv=none; b=bg+PEZYLbqR0JbR05w1u7GekdfJSJqPRneZbiwodjr9G+svoCPmL3x9bb3YDktuFjOG+cHVEFeIs6x+d7fv9g/83737TQKYRK7MNs2jjo21e8MvdXVdlJ6OfQFM2m1CjKdiwvLwv8CQ+sqDQ4V0Hsb9xXC51GJy3wWnIwfvazPI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758688908; c=relaxed/simple; bh=VkN8VdwJf6liSsFMc51tLMa9eVqIny+v9e0ELBq7zGo=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=EIHr+MFGmYSXL+pVvKLtE+qplE9M2pPvfZIvyoKPVlBjqDG5d/oIgTcebcpVnW5NtCgmNIvfgCUlCLH0T5yu0SyZ2WS/pSFLaQvDSjDeqYnkoiFuy/hhyABNqrPHvxcvPDJjsqTJrkiobCC0z4vef3PC58xK5GzY0MkYHzu8mBQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--wakel.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=mWnIgdqP; arc=none smtp.client-ip=209.85.214.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--wakel.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="mWnIgdqP" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-272ed8c106eso22629385ad.2 for ; Tue, 23 Sep 2025 21:41:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1758688906; x=1759293706; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=EE4vZbGIJvGo3igNi0/c9KzOBwiHc7y3M43t0PHBKt4=; b=mWnIgdqPllmdmEo1TRbYeqSo1qr64q902tyiXqgICLgjjj4tTQwcSB1dZEg5P20uTq PnE11BwUyKx6VgJdcP1OpL4dhVTzU3e3liX8RAA1WoY7QfUAx3oCOR7VQXpvuJcbmETr 7e/Bty9ijyhJmfa3lle3FXU66Ijv0j2yWTqlBBwHkYBPJblWe4C8GKvFBpY9ffCQaryS ZvLqpsSj+7WHeHxEMM47Xm1pwnEMzeM3m/d34KYw2fiLHqkOePbhOF8iKMp8H+3W2lh4 SOpy03yVZTjvUeXqvHUTty323aKPrlcOwuRcUnNGQ59VQKVpudPNvAPhdN2KeETNWjIY cXGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758688906; x=1759293706; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=EE4vZbGIJvGo3igNi0/c9KzOBwiHc7y3M43t0PHBKt4=; b=dsJAtHZ5qQ7HXjmIjdkrResNc5R8BCmA7msY0LdXvd5eb2+Mn+eJxtDlQLWxuM6jsb BfvueitI31M8TH2LTnYdVJX372T3/pS9nSwXsuuzwvu+9XONkcRvN7TaNQyAuszpJVAf tqjBB3Y2gE52JteDCOWWGKhNXoo+DYPEx5oAwsak0h7zEX2GsiKl8aiuiz6H5s455oys zS4nZxpLHvcrBpKzOZxzHVs2PXfiafe8ExNKKxfYnyIEF+21eJ95kvhMR5zow11VWfW8 J7CpJph0rWQ7kbjEEbRJ6nJG+N60oYl5fciRzhvdyp0qNn0/bUdeMaCla3pXgXxuo6vC KzPg== X-Forwarded-Encrypted: i=1; AJvYcCXspk9I9J5b56cOiuWrVZVhFHSSOHhrjBGwrp8VGS76FbW5d1bQMgVhugZDs5ZpSpOXalGFqlUcLqkkLQ16UiI=@vger.kernel.org X-Gm-Message-State: AOJu0YyTXf+RJIXSkybTqEDAFLetI+Y1L8vRF6w0xXcgCjb5LMwtDwq+ /QhOWlq03BC2r8kSNrmA52sFvuv5QSJ/K+eOMST+fWaXmthC66XjjavhIxOd6T7o05N3aygWHWT I8w== X-Google-Smtp-Source: AGHT+IFcIXMb7tZZIi7ut6xW8tfCbz5S5n6NQszs9NFINm8xgD7Ql5FeEdZB6xxblrlnYdA/SzP9uVQoDA== X-Received: from plbmv15.prod.google.com ([2002:a17:903:b8f:b0:267:fa7d:b637]) (user=wakel job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:f609:b0:248:e3fb:4dc8 with SMTP id d9443c01a7336-27cc7bb9ce9mr59498475ad.39.1758688906448; Tue, 23 Sep 2025 21:41:46 -0700 (PDT) Date: Wed, 24 Sep 2025 12:41:42 +0800 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.51.0.534.gc79095c0ca-goog Message-ID: <20250924044142.540162-1-wakel@google.com> Subject: [PATCH] Net: psock_tpacket: Fix null argument warning in walk_tx From: Wake Liu To: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan , netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Simon Horman , Wake Liu Content-Type: text/plain; charset="UTF-8" The sendto() call in walk_tx() was passing NULL as the buffer argument, which can trigger a -Wnonnull warning with some compilers. Although the size is 0 and no data is actually sent, passing a null pointer is technically incorrect. This commit changes NULL to an empty string literal ("") to satisfy the non-null argument requirement and fix the compiler warning. Signed-off-by: Wake Liu --- tools/testing/selftests/net/psock_tpacket.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/psock_tpacket.c b/tools/testing/selftests/net/psock_tpacket.c index 221270cee3ea..0c24adbb292e 100644 --- a/tools/testing/selftests/net/psock_tpacket.c +++ b/tools/testing/selftests/net/psock_tpacket.c @@ -470,7 +470,7 @@ static void walk_tx(int sock, struct ring *ring) bug_on(total_packets != 0); - ret = sendto(sock, NULL, 0, 0, NULL, 0); + ret = sendto(sock, "", 0, 0, NULL, 0); if (ret == -1) { perror("sendto"); exit(1); -- 2.51.0.534.gc79095c0ca-goog