From nobody Mon Feb 9 08:12:50 2026 Received: from mail-ej1-f43.google.com (mail-ej1-f43.google.com [209.85.218.43]) (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 3A791322E for ; Thu, 9 May 2024 10:48:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.43 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715251692; cv=none; b=qqablFbmCNIJ8jvImr2HZ3j+PbxVgGbyQV8tIw4N5bXfiAr2xHkex8O6q4KBt78gcMX5nussCjlIanMhEXjd8wXlGXEm79pF0wossGOIBHBh2hyxTp/stDdEyiygGVan5rQMrsewnAusfqEB+hlGaxg75PC/0mQop1XtzXs0vqY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715251692; c=relaxed/simple; bh=EAmmvUuXUCvQhVJyhOjnloUwsHV7hU6+Z0N6I4QkxKY=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=tSH26XW/Ij2XkUlP5M6k1CMakLZTFTlHfrdNDAs7Gkpfc9tOKYlxT5VxAssCcE2AuLs2A07mWisPD/ugooA02BKr+u1KGd+33duqmxxutH0loInZewZlxH8QvvysbGdUTEe+87EsCqBJqQgfh06j8iMMsssntYVmLnRTDG0X1m0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=kSLMi02n; arc=none smtp.client-ip=209.85.218.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="kSLMi02n" Received: by mail-ej1-f43.google.com with SMTP id a640c23a62f3a-a59b49162aeso164308666b.3 for ; Thu, 09 May 2024 03:48:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1715251689; x=1715856489; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:message-id:subject:cc :to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=7qlZtZk75coxcr32t+mJEdsIgCn5e7In21AxtT9MXDc=; b=kSLMi02n7NAwcdlaLMJ0lWD8/Lr9jOYvdvnDDWEf81jzisupG21zC9AkK5LJaqkxN2 JW2TI3pXpHNn4cjfssxNLaMT4cG5MBBaoTt1moRnFdLvyvfv1DlpbMLvlRI2TlR8Qw5d nBYzg7wKRoPcj2WHksU0Jlu0uoyeyNKSIjZ9zJ2W+HUA2nmp7sanhS90PPQ2Ytyr+0ht ug00jlRzAvhVDCnbnaQYo8LtvY2Rx+ellXzC4bA4JbI8Pj3aAeKBamB8bQsT68cxOvJX eiq1bPp9QMECb+BGC9TTnBNZW3JpVqLMUhs05KT49HwsCyhYlyLunA5uKsuGO+UVjKEm HFPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1715251689; x=1715856489; h=in-reply-to:content-disposition:mime-version:message-id:subject:cc :to:from:date:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=7qlZtZk75coxcr32t+mJEdsIgCn5e7In21AxtT9MXDc=; b=am4djIugee821bn0CQmAVukfjrQJ3P5LBgBAVNGGVRnPdPSHxsC6pt+DPUxPs5z2WG krW+QN1llpfrG2rtbu4G+4XbjFGzlTSFb2kgwqQpFVpUm6ckYKVFdpG8jM2ubeKIch5M YV7+YA2Mq3njwkXu2bepLUHonxd+qyCeiJWzxZ767SR9pfRDVI7530zp4WXdIAGR5srR gc7FrYcW7UDjGCO5R7Aszzf8gG0mhQ8Jcsmv5n2f5AT32UNKO6qsCpDmu512XXGkEeEv nlP+qEXPaI5A0AeHY/pnDfYGEFF4mR10/EuI3Ifkq44j+iAy46jpsjnJPBsTfVEw5umc lQxA== X-Forwarded-Encrypted: i=1; AJvYcCU4WFEME00RiI5IJEy7di9+UCJQYlnrTpf1MfA2l90A8AiHKJ7c/C3ZkPbGRt492EAcoK9u/DyYsd0ouu4abJZ9OHoX4WRVcsR7/N69 X-Gm-Message-State: AOJu0YwaykY/FuVoHkjCEc1oMfD24Vleba7sVXIOSHBfBadsgHGFpSdB e8dvHR2wz+Bt+xZDtg+jePpF+nLUrqxZWTBPGk0nD3kRpqvcO/iutVE8ROUpu5s= X-Google-Smtp-Source: AGHT+IGOSEuA2npGO9GewqwIXTPylXogor9RcnRiDhrr39n3ApUuc/Uzk7+5WHH+SNpvw9TtEXjwgA== X-Received: by 2002:a50:d595:0:b0:572:a7ec:1a5f with SMTP id 4fb4d7f45d1cf-5731d9f1eb8mr3880773a12.24.1715251689505; Thu, 09 May 2024 03:48:09 -0700 (PDT) Received: from localhost ([102.222.70.76]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5733bfe2dd1sm572297a12.58.2024.05.09.03.48.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 May 2024 03:48:09 -0700 (PDT) Date: Thu, 9 May 2024 13:48:05 +0300 From: Dan Carpenter To: Trond Myklebust Cc: Chuck Lever , Jeff Layton , Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Trond Myklebust , Anna Schumaker , linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH 1/2] SUNRPC: prevent integer overflow in XDR_QUADLEN() Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <332d1149-988e-4ece-8aef-1e3fb8bf8af4@moroto.mountain> X-Mailer: git-send-email haha only kidding Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The "l + 3" addition can have integer overflow on 32 bit systems when it is used in __xdr_inline_decode(). The overflowed value would be zero and the check "nwords > xdr->nwords" would not work as intended. Fixes: ba8e452a4fe6 ("SUNRPC: Add a helper function xdr_inline_peek") Signed-off-by: Dan Carpenter --- include/linux/sunrpc/xdr.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index 2f8dc47f1eb0..585059f2afca 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -14,6 +14,7 @@ #include #include #include +#include #include =20 struct bio_vec; @@ -29,7 +30,7 @@ struct rpc_rqst; /* * Buffer adjustment */ -#define XDR_QUADLEN(l) (((l) + 3) >> 2) +#define XDR_QUADLEN(l) (size_add(l, 3) >> 2) =20 /* * Generic opaque `network object.' --=20 2.43.0