From: Casey Schaufler <casey@schaufler-ca.com> To: casey.schaufler@intel.com, jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Cc: casey@schaufler-ca.com, linux-audit@redhat.com, keescook@chromium.org, john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp, paul@paul-moore.com, sds@tycho.nsa.gov, linux-kernel@vger.kernel.org, Chuck Lever <chuck.lever@oracle.com>, linux-nfs@vger.kernel.org Subject: [PATCH v26 17/25] LSM: Use lsmcontext in security_inode_getsecctx Date: Thu, 13 May 2021 13:07:59 -0700 [thread overview] Message-ID: <20210513200807.15910-18-casey@schaufler-ca.com> (raw) In-Reply-To: <20210513200807.15910-1-casey@schaufler-ca.com> Change the security_inode_getsecctx() interface to fill a lsmcontext structure instead of data and length pointers. This provides the information about which LSM created the context so that security_release_secctx() can use the correct hook. Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: Paul Moore <paul@paul-moore.com> Acked-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: John Johansen <john.johansen@canonical.com> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Cc: linux-nfs@vger.kernel.org --- fs/nfsd/nfs4xdr.c | 23 +++++++++-------------- include/linux/security.h | 5 +++-- security/security.c | 13 +++++++++++-- 3 files changed, 23 insertions(+), 18 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 089ec4b61ef1..fc7ba114c298 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2727,11 +2727,11 @@ nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) #ifdef CONFIG_NFSD_V4_SECURITY_LABEL static inline __be32 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, - void *context, int len) + struct lsmcontext *context) { __be32 *p; - p = xdr_reserve_space(xdr, len + 4 + 4 + 4); + p = xdr_reserve_space(xdr, context->len + 4 + 4 + 4); if (!p) return nfserr_resource; @@ -2741,13 +2741,13 @@ nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, */ *p++ = cpu_to_be32(0); /* lfs */ *p++ = cpu_to_be32(0); /* pi */ - p = xdr_encode_opaque(p, context, len); + p = xdr_encode_opaque(p, context->context, context->len); return 0; } #else static inline __be32 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, - void *context, int len) + struct lsmcontext *context) { return 0; } #endif @@ -2844,9 +2844,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, int err; struct nfs4_acl *acl = NULL; #ifdef CONFIG_NFSD_V4_SECURITY_LABEL - struct lsmcontext scaff; /* scaffolding */ - void *context = NULL; - int contextlen; + struct lsmcontext context = { }; #endif bool contextsupport = false; struct nfsd4_compoundres *resp = rqstp->rq_resp; @@ -2904,7 +2902,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { if (exp->ex_flags & NFSEXP_SECURITY_LABEL) err = security_inode_getsecctx(d_inode(dentry), - &context, &contextlen); + &context); else err = -EOPNOTSUPP; contextsupport = (err == 0); @@ -3324,8 +3322,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, #ifdef CONFIG_NFSD_V4_SECURITY_LABEL if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { - status = nfsd4_encode_security_label(xdr, rqstp, context, - contextlen); + status = nfsd4_encode_security_label(xdr, rqstp, &context); if (status) goto out; } @@ -3346,10 +3343,8 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, out: #ifdef CONFIG_NFSD_V4_SECURITY_LABEL - if (context) { - lsmcontext_init(&scaff, context, contextlen, 0); /*scaffolding*/ - security_release_secctx(&scaff); - } + if (context.context) + security_release_secctx(&context); #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ kfree(acl); if (tempfh) { diff --git a/include/linux/security.h b/include/linux/security.h index 666bd85e142b..0129400ff6e9 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -585,7 +585,7 @@ void security_release_secctx(struct lsmcontext *cp); void security_inode_invalidate_secctx(struct inode *inode); int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen); int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen); -int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen); +int security_inode_getsecctx(struct inode *inode, struct lsmcontext *cp); int security_locked_down(enum lockdown_reason what); #else /* CONFIG_SECURITY */ @@ -1461,7 +1461,8 @@ static inline int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 { return -EOPNOTSUPP; } -static inline int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) +static inline int security_inode_getsecctx(struct inode *inode, + struct lsmcontext *cp) { return -EOPNOTSUPP; } diff --git a/security/security.c b/security/security.c index 5bb41ca1fa9f..1e441c3491b5 100644 --- a/security/security.c +++ b/security/security.c @@ -2395,9 +2395,18 @@ int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) } EXPORT_SYMBOL(security_inode_setsecctx); -int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) +int security_inode_getsecctx(struct inode *inode, struct lsmcontext *cp) { - return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); + struct security_hook_list *hp; + + memset(cp, 0, sizeof(*cp)); + + hlist_for_each_entry(hp, &security_hook_heads.inode_getsecctx, list) { + cp->slot = hp->lsmid->slot; + return hp->hook.inode_getsecctx(inode, (void **)&cp->context, + &cp->len); + } + return -EOPNOTSUPP; } EXPORT_SYMBOL(security_inode_getsecctx); -- 2.29.2
WARNING: multiple messages have this Message-ID (diff)
From: Casey Schaufler <casey@schaufler-ca.com> To: casey.schaufler@intel.com, jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Cc: linux-nfs@vger.kernel.org, john.johansen@canonical.com, linux-kernel@vger.kernel.org, linux-audit@redhat.com, Chuck Lever <chuck.lever@oracle.com>, sds@tycho.nsa.gov Subject: [PATCH v26 17/25] LSM: Use lsmcontext in security_inode_getsecctx Date: Thu, 13 May 2021 13:07:59 -0700 [thread overview] Message-ID: <20210513200807.15910-18-casey@schaufler-ca.com> (raw) In-Reply-To: <20210513200807.15910-1-casey@schaufler-ca.com> Change the security_inode_getsecctx() interface to fill a lsmcontext structure instead of data and length pointers. This provides the information about which LSM created the context so that security_release_secctx() can use the correct hook. Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Acked-by: Paul Moore <paul@paul-moore.com> Acked-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: John Johansen <john.johansen@canonical.com> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Cc: linux-nfs@vger.kernel.org --- fs/nfsd/nfs4xdr.c | 23 +++++++++-------------- include/linux/security.h | 5 +++-- security/security.c | 13 +++++++++++-- 3 files changed, 23 insertions(+), 18 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 089ec4b61ef1..fc7ba114c298 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2727,11 +2727,11 @@ nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) #ifdef CONFIG_NFSD_V4_SECURITY_LABEL static inline __be32 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, - void *context, int len) + struct lsmcontext *context) { __be32 *p; - p = xdr_reserve_space(xdr, len + 4 + 4 + 4); + p = xdr_reserve_space(xdr, context->len + 4 + 4 + 4); if (!p) return nfserr_resource; @@ -2741,13 +2741,13 @@ nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, */ *p++ = cpu_to_be32(0); /* lfs */ *p++ = cpu_to_be32(0); /* pi */ - p = xdr_encode_opaque(p, context, len); + p = xdr_encode_opaque(p, context->context, context->len); return 0; } #else static inline __be32 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, - void *context, int len) + struct lsmcontext *context) { return 0; } #endif @@ -2844,9 +2844,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, int err; struct nfs4_acl *acl = NULL; #ifdef CONFIG_NFSD_V4_SECURITY_LABEL - struct lsmcontext scaff; /* scaffolding */ - void *context = NULL; - int contextlen; + struct lsmcontext context = { }; #endif bool contextsupport = false; struct nfsd4_compoundres *resp = rqstp->rq_resp; @@ -2904,7 +2902,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { if (exp->ex_flags & NFSEXP_SECURITY_LABEL) err = security_inode_getsecctx(d_inode(dentry), - &context, &contextlen); + &context); else err = -EOPNOTSUPP; contextsupport = (err == 0); @@ -3324,8 +3322,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, #ifdef CONFIG_NFSD_V4_SECURITY_LABEL if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { - status = nfsd4_encode_security_label(xdr, rqstp, context, - contextlen); + status = nfsd4_encode_security_label(xdr, rqstp, &context); if (status) goto out; } @@ -3346,10 +3343,8 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, out: #ifdef CONFIG_NFSD_V4_SECURITY_LABEL - if (context) { - lsmcontext_init(&scaff, context, contextlen, 0); /*scaffolding*/ - security_release_secctx(&scaff); - } + if (context.context) + security_release_secctx(&context); #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ kfree(acl); if (tempfh) { diff --git a/include/linux/security.h b/include/linux/security.h index 666bd85e142b..0129400ff6e9 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -585,7 +585,7 @@ void security_release_secctx(struct lsmcontext *cp); void security_inode_invalidate_secctx(struct inode *inode); int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen); int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen); -int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen); +int security_inode_getsecctx(struct inode *inode, struct lsmcontext *cp); int security_locked_down(enum lockdown_reason what); #else /* CONFIG_SECURITY */ @@ -1461,7 +1461,8 @@ static inline int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 { return -EOPNOTSUPP; } -static inline int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) +static inline int security_inode_getsecctx(struct inode *inode, + struct lsmcontext *cp) { return -EOPNOTSUPP; } diff --git a/security/security.c b/security/security.c index 5bb41ca1fa9f..1e441c3491b5 100644 --- a/security/security.c +++ b/security/security.c @@ -2395,9 +2395,18 @@ int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) } EXPORT_SYMBOL(security_inode_setsecctx); -int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) +int security_inode_getsecctx(struct inode *inode, struct lsmcontext *cp) { - return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); + struct security_hook_list *hp; + + memset(cp, 0, sizeof(*cp)); + + hlist_for_each_entry(hp, &security_hook_heads.inode_getsecctx, list) { + cp->slot = hp->lsmid->slot; + return hp->hook.inode_getsecctx(inode, (void **)&cp->context, + &cp->len); + } + return -EOPNOTSUPP; } EXPORT_SYMBOL(security_inode_getsecctx); -- 2.29.2 -- Linux-audit mailing list Linux-audit@redhat.com https://listman.redhat.com/mailman/listinfo/linux-audit
next prev parent reply other threads:[~2021-05-13 20:27 UTC|newest] Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <20210513200807.15910-1-casey.ref@schaufler-ca.com> 2021-05-13 20:07 ` [PATCH v26 00/25] LSM: Module stacking for AppArmor Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` [PATCH v26 01/25] LSM: Infrastructure management of the sock security Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` [PATCH v26 02/25] LSM: Add the lsmblob data structure Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-22 8:39 ` Mickaël Salaün 2021-05-22 8:39 ` Mickaël Salaün 2021-05-25 23:52 ` Casey Schaufler 2021-05-25 23:52 ` Casey Schaufler 2021-05-26 9:53 ` Mickaël Salaün 2021-05-26 9:53 ` Mickaël Salaün 2021-05-13 20:07 ` [PATCH v26 03/25] LSM: provide lsm name and id slot mappings Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-14 19:00 ` Kees Cook 2021-05-14 19:00 ` Kees Cook 2021-05-21 20:18 ` Paul Moore 2021-05-21 20:18 ` Paul Moore 2021-05-13 20:07 ` [PATCH v26 04/25] IMA: avoid label collisions with stacked LSMs Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-14 19:00 ` Kees Cook 2021-05-14 19:00 ` Kees Cook 2021-05-13 20:07 ` [PATCH v26 05/25] LSM: Use lsmblob in security_audit_rule_match Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` [PATCH v26 06/25] LSM: Use lsmblob in security_kernel_act_as Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` [PATCH v26 07/25] LSM: Use lsmblob in security_secctx_to_secid Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-14 19:03 ` Kees Cook 2021-05-14 19:03 ` Kees Cook 2021-05-21 20:18 ` Paul Moore 2021-05-21 20:18 ` Paul Moore 2021-05-13 20:07 ` [PATCH v26 08/25] LSM: Use lsmblob in security_secid_to_secctx Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-14 19:05 ` Kees Cook 2021-05-14 19:05 ` Kees Cook 2021-05-21 20:18 ` Paul Moore 2021-05-21 20:18 ` Paul Moore 2021-05-13 20:07 ` [PATCH v26 09/25] LSM: Use lsmblob in security_ipc_getsecid Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` [PATCH v26 10/25] LSM: Use lsmblob in security_task_getsecid Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` [PATCH v26 11/25] LSM: Use lsmblob in security_inode_getsecid Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` [PATCH v26 12/25] LSM: Use lsmblob in security_cred_getsecid Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` [PATCH v26 13/25] IMA: Change internal interfaces to use lsmblobs Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` [PATCH v26 14/25] LSM: Specify which LSM to display Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-14 19:23 ` Kees Cook 2021-05-14 19:23 ` Kees Cook 2021-05-17 19:52 ` Casey Schaufler 2021-05-17 19:52 ` Casey Schaufler 2021-05-21 20:19 ` Paul Moore 2021-05-21 20:19 ` Paul Moore 2021-05-13 20:07 ` [PATCH v26 15/25] LSM: Ensure the correct LSM context releaser Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-21 20:19 ` Paul Moore 2021-05-21 20:19 ` Paul Moore 2021-05-13 20:07 ` [PATCH v26 16/25] LSM: Use lsmcontext in security_secid_to_secctx Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler 2021-05-13 20:07 ` Casey Schaufler [this message] 2021-05-13 20:07 ` [PATCH v26 17/25] LSM: Use lsmcontext in security_inode_getsecctx Casey Schaufler 2021-05-14 19:24 ` Kees Cook 2021-05-14 19:24 ` Kees Cook 2021-05-13 20:08 ` [PATCH v26 18/25] LSM: security_secid_to_secctx in netlink netfilter Casey Schaufler 2021-05-13 20:08 ` Casey Schaufler 2021-05-21 20:19 ` Paul Moore 2021-05-21 20:19 ` Paul Moore 2021-05-13 20:08 ` [PATCH v26 19/25] NET: Store LSM netlabel data in a lsmblob Casey Schaufler 2021-05-13 20:08 ` Casey Schaufler 2021-05-13 20:08 ` [PATCH v26 20/25] LSM: Verify LSM display sanity in binder Casey Schaufler 2021-05-13 20:08 ` Casey Schaufler 2021-05-13 20:08 ` [PATCH v26 21/25] audit: add support for non-syscall auxiliary records Casey Schaufler 2021-05-13 20:08 ` Casey Schaufler 2021-05-21 20:19 ` Paul Moore 2021-05-21 20:19 ` Paul Moore 2021-05-13 20:08 ` [PATCH v26 22/25] Audit: Add new record for multiple process LSM attributes Casey Schaufler 2021-05-13 20:08 ` Casey Schaufler 2021-05-21 20:19 ` Paul Moore 2021-05-21 20:19 ` Paul Moore 2021-05-21 21:26 ` Richard Guy Briggs 2021-05-21 21:26 ` Richard Guy Briggs 2021-05-21 22:05 ` Casey Schaufler 2021-05-21 22:05 ` Casey Schaufler 2021-05-22 2:20 ` Paul Moore 2021-05-22 2:20 ` Paul Moore 2021-05-22 12:58 ` Richard Guy Briggs 2021-05-22 12:58 ` Richard Guy Briggs 2021-05-23 2:00 ` Steve Grubb 2021-05-24 15:53 ` Casey Schaufler 2021-05-24 16:06 ` Steve Grubb 2021-05-25 16:26 ` Casey Schaufler 2021-05-25 16:26 ` Casey Schaufler 2021-05-25 17:28 ` Casey Schaufler 2021-05-25 17:28 ` Casey Schaufler 2021-05-25 18:23 ` Richard Guy Briggs 2021-05-25 18:23 ` Richard Guy Briggs 2021-05-25 19:06 ` Casey Schaufler 2021-05-25 19:06 ` Casey Schaufler 2021-05-25 20:08 ` Richard Guy Briggs 2021-05-25 20:08 ` Richard Guy Briggs 2021-05-25 22:46 ` Casey Schaufler 2021-05-25 22:46 ` Casey Schaufler 2021-05-13 20:08 ` [PATCH v26 23/25] Audit: Add a new record for multiple object " Casey Schaufler 2021-05-13 20:08 ` Casey Schaufler 2021-05-13 20:08 ` [PATCH v26 24/25] LSM: Add /proc attr entry for full LSM context Casey Schaufler 2021-05-13 20:08 ` Casey Schaufler 2021-05-13 20:08 ` [PATCH v26 25/25] AppArmor: Remove the exclusive flag Casey Schaufler 2021-05-13 20:08 ` Casey Schaufler
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