From nobody Wed Sep 17 19:38:44 2025 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 47B49282FA for ; Fri, 8 Aug 2025 14:43:42 +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=1754664223; cv=none; b=O4nIQp/8XO6MKqdbdX/nboIJ2hwq5xF0M05pHEkEogoLFL2YE/qlUmMrxOnrtgSSVAuzkdb3Gp4bSzbtkcxa7SvR6LUabki26Y3HW7BTlH9kzkjsBHbnLN2lzK33hii99rx4J5hcNKt+DVCBS50RzOevZfW9KpRzA92Es8BMAX8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754664223; c=relaxed/simple; bh=hUeCdfvy1KLYUOQxjKBSVQMTwKknNzoqiFF4LLYh7aI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KYQ7LXWVK3MY8oJC/ybextFTotQ5a3WiD5+ukxkrGV/Yy92rQJ1i1QKkOeBfj0sRm3rNoY6oMrS9459VwGDbBjJUZsqtrNx46HfUWD76+0W1S1u98RqQP6pC1cWrInuSnGxq0KKZfodQ4rGy2uqCeYE0zhmmZwVcADdu8mTcHV0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=S2ga83Ps; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="S2ga83Ps" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E29DEC4CEF6; Fri, 8 Aug 2025 14:43:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754664222; bh=hUeCdfvy1KLYUOQxjKBSVQMTwKknNzoqiFF4LLYh7aI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S2ga83Pszzojlj2gsPGa/P2WFDCNO96g0i+DOD+J7q0tY9OkNVpjWILChCcFaMhcT dtEBgX8eahNQbakysX71H3/rtEPkNBALBaC+lBzBVqhO1zQ9V3jxUWstvA3vEfLuVG /wVVDr4bw5rqXXFVdpJygoFG8j3DgTm5y08+yfEIRToXmNgW6xMiWtbEM8mDf1CKeW ZDhj4rPTFGxv0HFYfXJn56UhDTFx4givj8PTFEzUjifVuy6I7FCgyhQ1Z+ILjnC9H6 pNeQBTZXNNu/cj5JpLX/ZYCJQdH+lw+5/69jlA4IG3qrKCxf3ryYJqBBZ6FpF9/JJ9 MzHY+ozOB6K2w== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v2 1/9] selftests: mptcp: sockopt: use getrandom for initialization Date: Fri, 8 Aug 2025 22:42:46 +0800 Message-ID: <2429797ceb15a01ee56c96864c2589437c22032e.1754664106.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.48.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Geliang Tang Replace /dev/urandom with getrandom() for initializing the RNG. This simplifies the code and avoids potential failures from opening device files while maintaining cryptographic quality randomness. These codes are from mptcp_inq.c. Signed-off-by: Geliang Tang --- .../selftests/net/mptcp/mptcp_sockopt.c | 20 +++++++------------ 1 file changed, 7 insertions(+), 13 deletions(-) diff --git a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c b/tools/test= ing/selftests/net/mptcp/mptcp_sockopt.c index e934dd26a59d..2bd75f731dfd 100644 --- a/tools/testing/selftests/net/mptcp/mptcp_sockopt.c +++ b/tools/testing/selftests/net/mptcp/mptcp_sockopt.c @@ -20,6 +20,7 @@ #include #include #include +#include =20 #include #include @@ -815,21 +816,14 @@ static int rcheck(int wstatus, const char *what) =20 static void init_rng(void) { - int fd =3D open("/dev/urandom", O_RDONLY); + unsigned int foo; =20 - if (fd >=3D 0) { - unsigned int foo; - ssize_t ret; - - /* can't fail */ - ret =3D read(fd, &foo, sizeof(foo)); - assert(ret =3D=3D sizeof(foo)); - - close(fd); - srand(foo); - } else { - srand(time(NULL)); + if (getrandom(&foo, sizeof(foo), 0) =3D=3D -1) { + perror("getrandom"); + exit(1); } + + srand(foo); } =20 int main(int argc, char *argv[]) --=20 2.48.1