From: John Johansen <john.johansen@canonical.com> To: Casey Schaufler <casey@schaufler-ca.com>, casey.schaufler@intel.com, jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Cc: linux-audit@redhat.com, keescook@chromium.org, penguin-kernel@i-love.sakura.ne.jp, paul@paul-moore.com, sds@tycho.nsa.gov Subject: Re: [PATCH v19 04/23] LSM: Use lsmblob in security_kernel_act_as Date: Tue, 28 Jul 2020 03:34:37 -0700 [thread overview] Message-ID: <fdbfba70-f133-9cc3-70b5-e87a66be8798@canonical.com> (raw) In-Reply-To: <20200724203226.16374-5-casey@schaufler-ca.com> On 7/24/20 1:32 PM, Casey Schaufler wrote: > Change the security_kernel_act_as interface to use a lsmblob > structure in place of the single u32 secid in support of > module stacking. Change its only caller, set_security_override, > to do the same. Change that one's only caller, > set_security_override_from_ctx, to call it with the new > parameter type. > > The security module hook is unchanged, still taking a secid. > The infrastructure passes the correct entry from the lsmblob. > lsmblob_init() is used to fill the lsmblob structure, however > this will be removed later in the series when security_secctx_to_secid() > is undated to provide a lsmblob instead of a secid. > fix ^ "undated" to updated > Reviewed-by: Kees Cook <keescook@chromium.org> > Reviewed-by: John Johansen <john.johansen@canonical.com> > Acked-by: Stephen Smalley <sds@tycho.nsa.gov> > Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> > --- > include/linux/cred.h | 3 ++- > include/linux/security.h | 5 +++-- > kernel/cred.c | 10 ++++++---- > security/security.c | 14 ++++++++++++-- > 4 files changed, 23 insertions(+), 9 deletions(-) > > diff --git a/include/linux/cred.h b/include/linux/cred.h > index 18639c069263..03ae0182cba6 100644 > --- a/include/linux/cred.h > +++ b/include/linux/cred.h > @@ -18,6 +18,7 @@ > > struct cred; > struct inode; > +struct lsmblob; > > /* > * COW Supplementary groups list > @@ -165,7 +166,7 @@ extern const struct cred *override_creds(const struct cred *); > extern void revert_creds(const struct cred *); > extern struct cred *prepare_kernel_cred(struct task_struct *); > extern int change_create_files_as(struct cred *, struct inode *); > -extern int set_security_override(struct cred *, u32); > +extern int set_security_override(struct cred *, struct lsmblob *); > extern int set_security_override_from_ctx(struct cred *, const char *); > extern int set_create_files_as(struct cred *, struct inode *); > extern int cred_fscmp(const struct cred *, const struct cred *); > diff --git a/include/linux/security.h b/include/linux/security.h > index 294410533b51..6d403a522918 100644 > --- a/include/linux/security.h > +++ b/include/linux/security.h > @@ -441,7 +441,7 @@ void security_cred_free(struct cred *cred); > int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp); > void security_transfer_creds(struct cred *new, const struct cred *old); > void security_cred_getsecid(const struct cred *c, u32 *secid); > -int security_kernel_act_as(struct cred *new, u32 secid); > +int security_kernel_act_as(struct cred *new, struct lsmblob *blob); > int security_kernel_create_files_as(struct cred *new, struct inode *inode); > int security_kernel_module_request(char *kmod_name); > int security_kernel_load_data(enum kernel_load_data_id id); > @@ -1055,7 +1055,8 @@ static inline void security_transfer_creds(struct cred *new, > { > } > > -static inline int security_kernel_act_as(struct cred *cred, u32 secid) > +static inline int security_kernel_act_as(struct cred *cred, > + struct lsmblob *blob) > { > return 0; > } > diff --git a/kernel/cred.c b/kernel/cred.c > index 421b1149c651..22e0e7cbefde 100644 > --- a/kernel/cred.c > +++ b/kernel/cred.c > @@ -733,14 +733,14 @@ EXPORT_SYMBOL(prepare_kernel_cred); > /** > * set_security_override - Set the security ID in a set of credentials > * @new: The credentials to alter > - * @secid: The LSM security ID to set > + * @blob: The LSM security information to set > * > * Set the LSM security ID in a set of credentials so that the subjective > * security is overridden when an alternative set of credentials is used. > */ > -int set_security_override(struct cred *new, u32 secid) > +int set_security_override(struct cred *new, struct lsmblob *blob) > { > - return security_kernel_act_as(new, secid); > + return security_kernel_act_as(new, blob); > } > EXPORT_SYMBOL(set_security_override); > > @@ -756,6 +756,7 @@ EXPORT_SYMBOL(set_security_override); > */ > int set_security_override_from_ctx(struct cred *new, const char *secctx) > { > + struct lsmblob blob; > u32 secid; > int ret; > > @@ -763,7 +764,8 @@ int set_security_override_from_ctx(struct cred *new, const char *secctx) > if (ret < 0) > return ret; > > - return set_security_override(new, secid); > + lsmblob_init(&blob, secid); > + return set_security_override(new, &blob); > } > EXPORT_SYMBOL(set_security_override_from_ctx); > > diff --git a/security/security.c b/security/security.c > index f9a249a93215..d6d882b1f7d5 100644 > --- a/security/security.c > +++ b/security/security.c > @@ -1692,9 +1692,19 @@ void security_cred_getsecid(const struct cred *c, u32 *secid) > } > EXPORT_SYMBOL(security_cred_getsecid); > > -int security_kernel_act_as(struct cred *new, u32 secid) > +int security_kernel_act_as(struct cred *new, struct lsmblob *blob) > { > - return call_int_hook(kernel_act_as, 0, new, secid); > + struct security_hook_list *hp; > + int rc; > + > + hlist_for_each_entry(hp, &security_hook_heads.kernel_act_as, list) { > + if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot)) > + continue; > + rc = hp->hook.kernel_act_as(new, blob->secid[hp->lsmid->slot]); > + if (rc != 0) > + return rc; > + } > + return 0; > } > > int security_kernel_create_files_as(struct cred *new, struct inode *inode) >
WARNING: multiple messages have this Message-ID (diff)
From: John Johansen <john.johansen@canonical.com> To: Casey Schaufler <casey@schaufler-ca.com>, casey.schaufler@intel.com, jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Cc: linux-audit@redhat.com, sds@tycho.nsa.gov Subject: Re: [PATCH v19 04/23] LSM: Use lsmblob in security_kernel_act_as Date: Tue, 28 Jul 2020 03:34:37 -0700 [thread overview] Message-ID: <fdbfba70-f133-9cc3-70b5-e87a66be8798@canonical.com> (raw) In-Reply-To: <20200724203226.16374-5-casey@schaufler-ca.com> On 7/24/20 1:32 PM, Casey Schaufler wrote: > Change the security_kernel_act_as interface to use a lsmblob > structure in place of the single u32 secid in support of > module stacking. Change its only caller, set_security_override, > to do the same. Change that one's only caller, > set_security_override_from_ctx, to call it with the new > parameter type. > > The security module hook is unchanged, still taking a secid. > The infrastructure passes the correct entry from the lsmblob. > lsmblob_init() is used to fill the lsmblob structure, however > this will be removed later in the series when security_secctx_to_secid() > is undated to provide a lsmblob instead of a secid. > fix ^ "undated" to updated > Reviewed-by: Kees Cook <keescook@chromium.org> > Reviewed-by: John Johansen <john.johansen@canonical.com> > Acked-by: Stephen Smalley <sds@tycho.nsa.gov> > Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> > --- > include/linux/cred.h | 3 ++- > include/linux/security.h | 5 +++-- > kernel/cred.c | 10 ++++++---- > security/security.c | 14 ++++++++++++-- > 4 files changed, 23 insertions(+), 9 deletions(-) > > diff --git a/include/linux/cred.h b/include/linux/cred.h > index 18639c069263..03ae0182cba6 100644 > --- a/include/linux/cred.h > +++ b/include/linux/cred.h > @@ -18,6 +18,7 @@ > > struct cred; > struct inode; > +struct lsmblob; > > /* > * COW Supplementary groups list > @@ -165,7 +166,7 @@ extern const struct cred *override_creds(const struct cred *); > extern void revert_creds(const struct cred *); > extern struct cred *prepare_kernel_cred(struct task_struct *); > extern int change_create_files_as(struct cred *, struct inode *); > -extern int set_security_override(struct cred *, u32); > +extern int set_security_override(struct cred *, struct lsmblob *); > extern int set_security_override_from_ctx(struct cred *, const char *); > extern int set_create_files_as(struct cred *, struct inode *); > extern int cred_fscmp(const struct cred *, const struct cred *); > diff --git a/include/linux/security.h b/include/linux/security.h > index 294410533b51..6d403a522918 100644 > --- a/include/linux/security.h > +++ b/include/linux/security.h > @@ -441,7 +441,7 @@ void security_cred_free(struct cred *cred); > int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp); > void security_transfer_creds(struct cred *new, const struct cred *old); > void security_cred_getsecid(const struct cred *c, u32 *secid); > -int security_kernel_act_as(struct cred *new, u32 secid); > +int security_kernel_act_as(struct cred *new, struct lsmblob *blob); > int security_kernel_create_files_as(struct cred *new, struct inode *inode); > int security_kernel_module_request(char *kmod_name); > int security_kernel_load_data(enum kernel_load_data_id id); > @@ -1055,7 +1055,8 @@ static inline void security_transfer_creds(struct cred *new, > { > } > > -static inline int security_kernel_act_as(struct cred *cred, u32 secid) > +static inline int security_kernel_act_as(struct cred *cred, > + struct lsmblob *blob) > { > return 0; > } > diff --git a/kernel/cred.c b/kernel/cred.c > index 421b1149c651..22e0e7cbefde 100644 > --- a/kernel/cred.c > +++ b/kernel/cred.c > @@ -733,14 +733,14 @@ EXPORT_SYMBOL(prepare_kernel_cred); > /** > * set_security_override - Set the security ID in a set of credentials > * @new: The credentials to alter > - * @secid: The LSM security ID to set > + * @blob: The LSM security information to set > * > * Set the LSM security ID in a set of credentials so that the subjective > * security is overridden when an alternative set of credentials is used. > */ > -int set_security_override(struct cred *new, u32 secid) > +int set_security_override(struct cred *new, struct lsmblob *blob) > { > - return security_kernel_act_as(new, secid); > + return security_kernel_act_as(new, blob); > } > EXPORT_SYMBOL(set_security_override); > > @@ -756,6 +756,7 @@ EXPORT_SYMBOL(set_security_override); > */ > int set_security_override_from_ctx(struct cred *new, const char *secctx) > { > + struct lsmblob blob; > u32 secid; > int ret; > > @@ -763,7 +764,8 @@ int set_security_override_from_ctx(struct cred *new, const char *secctx) > if (ret < 0) > return ret; > > - return set_security_override(new, secid); > + lsmblob_init(&blob, secid); > + return set_security_override(new, &blob); > } > EXPORT_SYMBOL(set_security_override_from_ctx); > > diff --git a/security/security.c b/security/security.c > index f9a249a93215..d6d882b1f7d5 100644 > --- a/security/security.c > +++ b/security/security.c > @@ -1692,9 +1692,19 @@ void security_cred_getsecid(const struct cred *c, u32 *secid) > } > EXPORT_SYMBOL(security_cred_getsecid); > > -int security_kernel_act_as(struct cred *new, u32 secid) > +int security_kernel_act_as(struct cred *new, struct lsmblob *blob) > { > - return call_int_hook(kernel_act_as, 0, new, secid); > + struct security_hook_list *hp; > + int rc; > + > + hlist_for_each_entry(hp, &security_hook_heads.kernel_act_as, list) { > + if (WARN_ON(hp->lsmid->slot < 0 || hp->lsmid->slot >= lsm_slot)) > + continue; > + rc = hp->hook.kernel_act_as(new, blob->secid[hp->lsmid->slot]); > + if (rc != 0) > + return rc; > + } > + return 0; > } > > int security_kernel_create_files_as(struct cred *new, struct inode *inode) > -- Linux-audit mailing list Linux-audit@redhat.com https://www.redhat.com/mailman/listinfo/linux-audit
next prev parent reply other threads:[~2020-07-28 20:29 UTC|newest] Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <20200724203226.16374-1-casey.ref@schaufler-ca.com> 2020-07-24 20:32 ` [PATCH v19 00/23] LSM: Module stacking for AppArmor Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 01/23] LSM: Infrastructure management of the sock security Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 02/23] LSM: Create and manage the lsmblob data structure Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-27 16:12 ` Stephen Smalley 2020-07-27 16:12 ` Stephen Smalley 2020-07-27 21:04 ` Casey Schaufler 2020-07-27 21:04 ` Casey Schaufler 2020-07-28 19:50 ` John Johansen 2020-07-28 19:50 ` John Johansen 2020-07-24 20:32 ` [PATCH v19 03/23] LSM: Use lsmblob in security_audit_rule_match Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 04/23] LSM: Use lsmblob in security_kernel_act_as Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-28 10:34 ` John Johansen [this message] 2020-07-28 10:34 ` John Johansen 2020-07-24 20:32 ` [PATCH v19 05/23] net: Prepare UDS for security module stacking Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-28 10:57 ` John Johansen 2020-07-28 10:57 ` John Johansen 2020-07-24 20:32 ` [PATCH v19 06/23] LSM: Use lsmblob in security_secctx_to_secid Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-28 11:11 ` John Johansen 2020-07-28 11:11 ` John Johansen 2020-07-28 23:41 ` Casey Schaufler 2020-07-28 23:41 ` Casey Schaufler 2020-07-29 0:30 ` John Johansen 2020-07-29 0:30 ` John Johansen 2020-07-24 20:32 ` [PATCH v19 07/23] LSM: Use lsmblob in security_secid_to_secctx Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 08/23] LSM: Use lsmblob in security_ipc_getsecid Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 09/23] LSM: Use lsmblob in security_task_getsecid Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 10/23] LSM: Use lsmblob in security_inode_getsecid Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 11/23] LSM: Use lsmblob in security_cred_getsecid Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 12/23] IMA: Change internal interfaces to use lsmblobs Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 13/23] LSM: Specify which LSM to display Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-27 20:36 ` James Morris 2020-07-27 20:36 ` James Morris 2020-07-27 20:40 ` John Johansen 2020-07-27 20:40 ` John Johansen 2020-07-28 18:29 ` John Johansen 2020-07-28 18:29 ` John Johansen 2020-07-24 20:32 ` [PATCH v19 14/23] LSM: Ensure the correct LSM context releaser Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 15/23] LSM: Use lsmcontext in security_secid_to_secctx Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-28 20:13 ` John Johansen 2020-07-28 20:13 ` John Johansen 2020-07-24 20:32 ` [PATCH v19 16/23] LSM: Use lsmcontext in security_inode_getsecctx Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-28 20:28 ` John Johansen 2020-07-28 20:28 ` John Johansen 2020-07-24 20:32 ` [PATCH v19 17/23] LSM: security_secid_to_secctx in netlink netfilter Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-27 20:37 ` James Morris 2020-07-27 20:37 ` James Morris 2020-07-24 20:32 ` [PATCH v19 18/23] NET: Store LSM netlabel data in a lsmblob Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 19/23] LSM: Verify LSM display sanity in binder Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-30 8:40 ` John Johansen 2020-07-30 8:40 ` John Johansen 2020-07-24 20:32 ` [PATCH v19 20/23] Audit: Add new record for multiple process LSM attributes Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-27 19:04 ` Stephen Smalley 2020-07-27 19:04 ` Stephen Smalley 2020-07-24 20:32 ` [PATCH v19 21/23] Audit: Add a new record for multiple object " Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-27 20:40 ` James Morris 2020-07-27 20:40 ` James Morris 2020-07-24 20:32 ` [PATCH v19 22/23] LSM: Add /proc attr entry for full LSM context Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-30 10:03 ` John Johansen 2020-07-30 10:03 ` John Johansen 2020-07-30 20:44 ` Casey Schaufler 2020-07-30 20:44 ` Casey Schaufler 2020-07-30 20:57 ` John Johansen 2020-07-30 20:57 ` John Johansen 2020-07-30 22:22 ` Casey Schaufler 2020-07-30 22:22 ` Casey Schaufler 2020-07-24 20:32 ` [PATCH v19 23/23] AppArmor: Remove the exclusive flag Casey Schaufler 2020-07-24 20:32 ` Casey Schaufler 2020-07-30 9:23 ` John Johansen 2020-07-30 9:23 ` John Johansen
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