From mboxrd@z Thu Jan 1 00:00:00 1970 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 0A5391917C6; Thu, 29 Aug 2024 14:23:38 +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=1724941419; cv=none; b=SBotiKkvYsVQwEuIiT0Ed3yKsy1C5CoNx0T4eBGKCBVTdfT/l2D2YStx20DQrDFq9WI3TtoDO7x5/myG+Xj+geg00mUBreSzpDxr/R5aiI2j1XKlF3XTvYVhWMNXOJdTnSdXYDOlaoKG9R+hUha93aBxz+SFPMmREB3+oH0UryE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724941419; c=relaxed/simple; bh=WZNVxm77WVtrive9hW/+zhR9tq5Jxvxl38utPNozUCM=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=RZksKvA56MGR4bkoaF8v3I/u1A72c2Gh1A9utuv3X5vPfso9/TJ9Vzi0QXxG6bunepQlLqhTrk1ELQHn2d1+EIWiwq93mYfPdPmNT2tTLXrgOQDcvkNUAZS/hynWCnt01TbMSUfvLsxbW4LGhkc0TAoSuz3l2m9h2wR/mvVxD/Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LexUJqHl; 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="LexUJqHl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D366EC4CEC1; Thu, 29 Aug 2024 14:23:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1724941418; bh=WZNVxm77WVtrive9hW/+zhR9tq5Jxvxl38utPNozUCM=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=LexUJqHl1JGWRM6a3c1o3F6QNj8dgHnF4jqKsWmTPR4TUJF68qY3iJZWmjGOb3TzQ DkIMnbBkfUpxVVxgww6Q60dihcgVvO2i5kc4I/r4Y8CnkoOVT+lVrRClfrb6sObe3t kRJK0ggcIxSYWyxOGIHfi8bv5u1MtK3n+mM2gqEBaJueRDeGoNpuxjFimrCDCR+3ir dJERQuGL7mEH5G8VJq0IGgnRk7G1kPMCEjVIeFdCyS2NYlz9FaFj/Gc1+juwE3jC2n cTflsjdib7SoA4MZEtGuxuwZdOMCVFvFq0IxU8ol/4AIaueAhaPBfYcirTJkC/bIsk IPT0ZSgmJPR7A== Message-ID: Subject: Re: [PATCH v14 05/25] NFSD: Refactor nfsd_setuser_and_check_port() From: Jeff Layton To: Mike Snitzer , linux-nfs@vger.kernel.org Cc: Chuck Lever , Anna Schumaker , Trond Myklebust , NeilBrown , linux-fsdevel@vger.kernel.org Date: Thu, 29 Aug 2024 10:23:36 -0400 In-Reply-To: <20240829010424.83693-6-snitzer@kernel.org> References: <20240829010424.83693-1-snitzer@kernel.org> <20240829010424.83693-6-snitzer@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 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There are several places where __fh_verify unconditionally dereferences > rqstp to check that the connection is suitably secure. They look at > rqstp->rq_xprt which is not meaningful in the target use case of > "localio" NFS in which the client talks directly to the local server. >=20 > Prepare these to always succeed when rqstp is NULL. >=20 > Signed-off-by: NeilBrown > Co-developed-by: Mike Snitzer > Signed-off-by: Mike Snitzer > Signed-off-by: Chuck Lever > --- > fs/nfsd/nfsfh.c | 19 ++++++++++--------- > 1 file changed, 10 insertions(+), 9 deletions(-) >=20 > diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c > index 50d23d56f403..4b964a71a504 100644 > --- a/fs/nfsd/nfsfh.c > +++ b/fs/nfsd/nfsfh.c > @@ -87,23 +87,24 @@ nfsd_mode_check(struct dentry *dentry, umode_t reques= ted) > return nfserr_wrong_type; > } > =20 > -static bool nfsd_originating_port_ok(struct svc_rqst *rqstp, int flags) > +static bool nfsd_originating_port_ok(struct svc_rqst *rqstp, > + struct svc_cred *cred, > + struct svc_export *exp) > { > - if (flags & NFSEXP_INSECURE_PORT) > + if (nfsexp_flags(cred, exp) & NFSEXP_INSECURE_PORT) > return true; > /* We don't require gss requests to use low ports: */ > - if (rqstp->rq_cred.cr_flavor >=3D RPC_AUTH_GSS) > + if (cred->cr_flavor >=3D RPC_AUTH_GSS) > return true; > return test_bit(RQ_SECURE, &rqstp->rq_flags); > } > =20 > static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp, > + struct svc_cred *cred, > struct svc_export *exp) > { > - int flags =3D nfsexp_flags(&rqstp->rq_cred, exp); > - > /* Check if the request originated from a secure port. */ > - if (!nfsd_originating_port_ok(rqstp, flags)) { > + if (rqstp && !nfsd_originating_port_ok(rqstp, cred, exp)) { > RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); > dprintk("nfsd: request from insecure port %s!\n", > svc_print_addr(rqstp, buf, sizeof(buf))); > @@ -111,7 +112,7 @@ static __be32 nfsd_setuser_and_check_port(struct svc_= rqst *rqstp, > } > =20 > /* Set user creds for this exportpoint */ > - return nfserrno(nfsd_setuser(&rqstp->rq_cred, exp)); > + return nfserrno(nfsd_setuser(cred, exp)); > } > =20 > static inline __be32 check_pseudo_root(struct dentry *dentry, > @@ -219,7 +220,7 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqs= tp, struct svc_fh *fhp) > put_cred(override_creds(new)); > put_cred(new); > } else { > - error =3D nfsd_setuser_and_check_port(rqstp, exp); > + error =3D nfsd_setuser_and_check_port(rqstp, &rqstp->rq_cred, exp); > if (error) > goto out; > } > @@ -358,7 +359,7 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp,= umode_t type, int access) > if (error) > goto out; > =20 > - error =3D nfsd_setuser_and_check_port(rqstp, exp); > + error =3D nfsd_setuser_and_check_port(rqstp, &rqstp->rq_cred, exp); > if (error) > goto out; > =20 Reviewed-by: Jeff Layton