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Tue, 4 Jan 2022 17:04:30 +0000 (GMT) From: Stefan Berger To: linux-integrity@vger.kernel.org Cc: zohar@linux.ibm.com, serge@hallyn.com, christian.brauner@ubuntu.com, containers@lists.linux.dev, dmitry.kasatkin@gmail.com, ebiederm@xmission.com, krzysztof.struczynski@huawei.com, roberto.sassu@huawei.com, mpeters@redhat.com, lhinds@redhat.com, lsturman@redhat.com, puiterwi@redhat.com, jejb@linux.ibm.com, jamjoom@us.ibm.com, linux-kernel@vger.kernel.org, paul@paul-moore.com, rgb@redhat.com, linux-security-module@vger.kernel.org, jmorris@namei.org, Stefan Berger Subject: [PATCH v8 12/19] userns: Add pointer to ima_namespace to user_namespace Date: Tue, 4 Jan 2022 12:04:09 -0500 Message-Id: <20220104170416.1923685-13-stefanb@linux.vnet.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220104170416.1923685-1-stefanb@linux.vnet.ibm.com> References: <20220104170416.1923685-1-stefanb@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: PEzQL0DKK7mApvKDLVYEbiwCoZMenG2v X-Proofpoint-GUID: lVZ_69bKV-Yxq1gtwThSYGHK6KbsrUot X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-04_08,2022-01-04_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 mlxlogscore=999 spamscore=0 suspectscore=0 lowpriorityscore=0 mlxscore=0 impostorscore=0 bulkscore=0 clxscore=1015 phishscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2201040114 Precedence: bulk List-ID: From: Stefan Berger Add a pointer to ima_namespace to the user_namespace and initialize the init_user_ns with a pointer to init_ima_ns. Signed-off-by: Stefan Berger --- include/linux/ima.h | 2 ++ include/linux/user_namespace.h | 4 ++++ kernel/user.c | 4 ++++ security/integrity/ima/ima.h | 8 ++++++++ 4 files changed, 18 insertions(+) diff --git a/include/linux/ima.h b/include/linux/ima.h index fcee2a51bb87..e1d65162d1fb 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -14,6 +14,8 @@ #include struct linux_binprm; +extern struct ima_namespace init_ima_ns; + #ifdef CONFIG_IMA extern enum hash_algo ima_get_current_hash_algo(void); extern int ima_bprm_check(struct linux_binprm *bprm); diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h index 33a4240e6a6f..019e8cf7b633 100644 --- a/include/linux/user_namespace.h +++ b/include/linux/user_namespace.h @@ -36,6 +36,7 @@ struct uid_gid_map { /* 64 bytes -- 1 cache line */ #define USERNS_INIT_FLAGS USERNS_SETGROUPS_ALLOWED struct ucounts; +struct ima_namespace; enum ucount_type { UCOUNT_USER_NAMESPACES, @@ -99,6 +100,9 @@ struct user_namespace { #endif struct ucounts *ucounts; long ucount_max[UCOUNT_COUNTS]; +#ifdef CONFIG_IMA_NS + struct ima_namespace *ima_ns; +#endif } __randomize_layout; struct ucounts { diff --git a/kernel/user.c b/kernel/user.c index e2cf8c22b539..e5d1f4b9b8ba 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -19,6 +19,7 @@ #include #include #include +#include /* * userns count is 1 for root user, 1 for init_uts_ns, @@ -67,6 +68,9 @@ struct user_namespace init_user_ns = { .keyring_name_list = LIST_HEAD_INIT(init_user_ns.keyring_name_list), .keyring_sem = __RWSEM_INITIALIZER(init_user_ns.keyring_sem), #endif +#ifdef CONFIG_IMA_NS + .ima_ns = &init_ima_ns, +#endif }; EXPORT_SYMBOL_GPL(init_user_ns); diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 1c1e859721ee..f63c6f22b853 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -490,6 +490,14 @@ struct user_namespace *ima_user_ns_from_file(const struct file *filp) return file_inode(filp)->i_sb->s_user_ns; } +static inline struct ima_namespace +*ima_ns_from_user_ns(struct user_namespace *user_ns) +{ + if (user_ns == &init_user_ns) + return &init_ima_ns; + return NULL; +} + static inline struct ima_namespace *get_current_ns(void) { return &init_ima_ns;