From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f68.google.com (mail-pj1-f68.google.com [209.85.216.68]) (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 00E5C29D29E for ; Wed, 25 Feb 2026 03:38:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.68 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771990737; cv=none; b=tBivnF6KxMELddbsY0/ArpFuxG8Eb0b8kKkIa3KYPHQyHjByVYC/QaINlcn1kAvyHvABZZA5SipnpIRccxTUYLol2PY6ZlYJTdObQvAO+DzW6C+l4o3vt0WAH5mXA5fTPNRA4gVwoP5L7fvk3l0qwV85Uj37ahzlxyfVkUXSXuU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771990737; c=relaxed/simple; bh=ioQkH6Kq3BaHcNNHYkbSQWOm2Z0hguUCzLEhgRepsrc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cB6BtqJhfcj5ggrVhk++HDKs4m6afcSJg5kWs7xpbQ3OInek5nXqCJ5USxp523fNFEsKZfpXlEo74cUoLMleq58LQZCcXpqRt/5luXKeUWBYSkGFcrquotc2lzne+d0NIAjLc6AUx9neSSSHrLFSUhz9SuKjVfkcrdXUzl2ND64= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=YlgskxDC; arc=none smtp.client-ip=209.85.216.68 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YlgskxDC" Received: by mail-pj1-f68.google.com with SMTP id 98e67ed59e1d1-358ed67cd4bso227914a91.0 for ; Tue, 24 Feb 2026 19:38:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1771990735; x=1772595535; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=pRulitact7LuRkcM6p1wuTRq7YmEiipbfGs7cAozTt0=; b=YlgskxDCaagXqLqBWNR32RcGuHpKpYOSiknLrzppzx9jdMQLim4rYz540m4ElxQbL3 ERewl5Y56lZNqRu0Kw/1C6AF2IDjJgYka6Yhf5iRvnqTB/ka//gKILEsux4Fy3D3lV5K uTG9en2lXeo+kRyg7ePdsIKWDZ9R5UDJV8RjwstCCKYioxO8kRYYBQiSLNlZRw0dxM+x WWRqp3Ss5M2+3N+XtOHjpxllkwAALttF+qPFTNP7QDonlrEovwdrGdVL/riuSt+PIt/F WRNv2A6Qz0bOjUqA4J/b1OUdWbrMFSWvQpjt1bjPZh/niWN9dqNk9alrq7x+qU7+jfGm Ff2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771990735; x=1772595535; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=pRulitact7LuRkcM6p1wuTRq7YmEiipbfGs7cAozTt0=; b=ngUkfz1ngjiBX2ObndWL4oIAP3nXt0XBHbeATMUw2fc+oeGIemU1cZ9BY8871FlODA IwxSk3XwOeWhpEU0R+tJiOfwCI8ilzAYTYwSxWlWpNWxoiu71iEfQ15JgX87rIyu2MIs BcqPdD5wur2a1UwRvWnyVD3eV2oPZEjn1E9LR0s20apu2KEI57T1oFMbhMHI3pb1iwzZ 5BkEsdLQsBRh1blvnMs9fPzlnD5aIebWJBE2vKdWPAfX5pojg/NE+3oHRGRev2gbFWxg 4j8r6aGGmRlk4Q90v4Eh3g3gJ05QQ0YMS4HPpjLKhGTl2aAxllGloCUfKtqG9CXrKg5r 7IIg== X-Forwarded-Encrypted: i=1; AJvYcCWyG98H8D3gZV2O7SGnFYfwYNaPmWXoVGLV4TNy2HnC1exKwi7e3u3L9+0HUYya6PxqBr8SvN4=@vger.kernel.org X-Gm-Message-State: AOJu0Yztb7hHcuaJybRfNEZ4krI0RvOmoA+ffaXcMkOkdm/vxL4QUi4T XLL2+VmqJmZmPLd4TjPgqctcMvIXma9JLzzrsaxYCRLBw04oR58n2fPd X-Gm-Gg: ATEYQzxlLPcn0LK71pwulq6Gfv3HTZACA9+Wls0P2Lbr6ctOIzJOJf4ERql2xjpBYU8 yy2QYbVjUkvwEW9s5ZK+ypju+Mm60ZG2ycgqhFhx2L6pNVcAqnEJ+PAHVGnX7XXy0Q0Y8GH7GZo Xj3QEhGMKm5qnflBl+bfFeFgz07nLur2vT17jsnkG2sEYfKzckqE3w9yhTrrBvnhUJ8OCsHwxqL LLRgOzNFTa203Emu1D7iyeK4DtdS3mmoo8pRT2IFNXoIU5ePBBOpr44YuR0Bo4GKOOGdUAweU6F JXaf+Qe/jOpnvNretrgAe5hRfW0d8YHYGwGAifNXGuKsrdoQPBfTYgIxoWS96C+ax0xvexeAuYv Le/Y2VFgcifbUXc5poM/LL+2nbFMUASwK49pwNjkjzlft9zpFF3x/JWRNXRz7Q7bcUafGMza2Ak 3AdvH6Zhdeev+AJHY7IJ1bT0Oi7TPbh3GiUIP2QFRDBJC3o1Y7DUIm2bKZ2lZ2HkRJAWSolg== X-Received: by 2002:a17:90b:530d:b0:32e:72bd:6d5a with SMTP id 98e67ed59e1d1-359037f3512mr2134249a91.1.1771990735285; Tue, 24 Feb 2026 19:38:55 -0800 (PST) Received: from localhost.localdomain ([138.199.21.245]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-359018838b2sm1161746a91.5.2026.02.24.19.38.51 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Tue, 24 Feb 2026 19:38:54 -0800 (PST) From: Eric-Terminal To: Dominique Martinet , Eric Van Hensbergen , Latchesar Ionkov , "David S . Miller" , Jakub Kicinski Cc: v9fs@lists.linux.dev, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Nikolay Aleksandrov , bridge@lists.linux.dev, Anna Schumaker , Chuck Lever , linux-nfs@vger.kernel.org, Yufan Chen Subject: [PATCH v2 2/4] 9p/trans_xen: replace simple_strto* with kstrtouint Date: Wed, 25 Feb 2026 11:38:38 +0800 Message-ID: <20260225033840.33000-3-ericterminal@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260225033840.33000-1-ericterminal@gmail.com> References: <20260225010853.15916-1-ericterminal@gmail.com> <20260225033840.33000-1-ericterminal@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1616; i=ericterminal@gmail.com; h=from:subject; bh=ULBANr6zOAUiLxfBQ+XUgxxtzikjVOyTnngJAb6RsoQ=; b=owGbwMvMwCXWM/dCzeS3H+sZT6slMWTOy5Mv3PZGZ5rZi2trbn3b/meXvM21X0ZzD/hIHVHnU j+hlrfcraOUhUGMi0FWTJHl7v99c3O9bs25zn04F2YOKxPIEAYuTgGYyAFhhr+iYfnVLu2vlgl9 9Lm+6VXxTJlXa/TrWIMsHp+NPXTYLvgIw1+pWW6lZxMq+642FKwxSdu3MvZ8S+y6r4dllvUskXi 4sJ0VAA== X-Developer-Key: i=ericterminal@gmail.com; a=openpgp; fpr=DDFFBE9D6D4ADA9CD70BC36D8C9DD07C93EDF17F Content-Transfer-Encoding: 8bit From: Yufan Chen In xen_9pfs_front_init(), parse the backend version list as comma-separated tokens with kstrtouint(). This improves error reporting and ensures strict token validation while explicitly requiring protocol version 1. Signed-off-by: Yufan Chen --- net/9p/trans_xen.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c index 85b9ebfaa..f9fb2db7a 100644 --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -413,23 +413,29 @@ static int xen_9pfs_front_init(struct xenbus_device *dev) int ret, i; struct xenbus_transaction xbt; struct xen_9pfs_front_priv *priv; - char *versions, *v; - unsigned int max_rings, max_ring_order, len = 0; + char *versions, *v, *token; + bool version_1 = false; + unsigned int max_rings, max_ring_order, len = 0, version; versions = xenbus_read(XBT_NIL, dev->otherend, "versions", &len); if (IS_ERR(versions)) return PTR_ERR(versions); - for (v = versions; *v; v++) { - if (simple_strtoul(v, &v, 10) == 1) { - v = NULL; - break; + for (v = versions; (token = strsep(&v, ",")); ) { + if (!*token) + continue; + + ret = kstrtouint(token, 10, &version); + if (ret) { + kfree(versions); + return ret; } - } - if (v) { - kfree(versions); - return -EINVAL; + if (version == 1) + version_1 = true; } kfree(versions); + if (!version_1) + return -EINVAL; + max_rings = xenbus_read_unsigned(dev->otherend, "max-rings", 0); if (max_rings < XEN_9PFS_NUM_RINGS) return -EINVAL; -- 2.47.3