diff --git a/fs/file_table.c b/fs/file_table.c index 725407f374fa..1a0962981b48 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -26,7 +26,6 @@ #include #include #include -#include #include #include @@ -368,7 +367,6 @@ static void __fput(struct file *file) locks_remove_file(file); security_file_release(file); - ima_file_free(file); if (unlikely(file->f_flags & FASYNC)) { if (file->f_op->fasync) file->f_op->fasync(-1, file, 0); diff --git a/fs/namei.c b/fs/namei.c index c7ac7fdf0f25..1bf7435cdf76 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -27,7 +27,6 @@ #include #include #include -#include #include #include #include @@ -3641,8 +3640,6 @@ static int do_open(struct nameidata *nd, error = vfs_open(&nd->path, file); if (!error) error = security_file_post_open(file, op->acc_mode); - if (!error) - error = ima_file_check(file, op->acc_mode); if (!error && do_truncate) error = handle_truncate(idmap, file); if (unlikely(error > 0)) { @@ -3706,7 +3703,6 @@ static int vfs_tmpfile(struct mnt_idmap *idmap, spin_unlock(&inode->i_lock); } security_inode_post_create_tmpfile(idmap, inode); - ima_post_create_tmpfile(idmap, inode); return 0; } @@ -4052,8 +4048,6 @@ retry: case 0: case S_IFREG: error = vfs_create(idmap, path.dentry->d_inode, dentry, mode, true); - if (!error) - ima_post_path_mknod(idmap, dentry); break; case S_IFCHR: case S_IFBLK: error = vfs_mknod(idmap, path.dentry->d_inode, diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index e44d8239545b..4349dde92154 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -25,7 +25,6 @@ #include #include #include -#include #include #include #include @@ -883,12 +882,6 @@ __nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, goto out; } - host_err = ima_file_check(file, may_flags); - if (host_err) { - fput(file); - goto out; - } - if (may_flags & NFSD_MAY_64BIT_COOKIE) file->f_mode |= FMODE_64BITHASH; else diff --git a/fs/open.c b/fs/open.c index a84d21e55c39..1cf05a1413aa 100644 --- a/fs/open.c +++ b/fs/open.c @@ -29,7 +29,6 @@ #include #include #include -#include #include #include #include diff --git a/include/linux/ima.h b/include/linux/ima.h index 0f9af283cbc8..23ae24b60ecf 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -16,24 +16,6 @@ struct linux_binprm; #ifdef CONFIG_IMA extern enum hash_algo ima_get_current_hash_algo(void); -extern int ima_bprm_check(struct linux_binprm *bprm); -extern int ima_file_check(struct file *file, int mask); -extern void ima_post_create_tmpfile(struct mnt_idmap *idmap, - struct inode *inode); -extern void ima_file_free(struct file *file); -extern int ima_file_mmap(struct file *file, unsigned long reqprot, - unsigned long prot, unsigned long flags); -extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, - unsigned long prot); -extern int ima_load_data(enum kernel_load_data_id id, bool contents); -extern int ima_post_load_data(char *buf, loff_t size, - enum kernel_load_data_id id, char *description); -extern int ima_read_file(struct file *file, enum kernel_read_file_id id, - bool contents); -extern int ima_post_read_file(struct file *file, char *buf, loff_t size, - enum kernel_read_file_id id); -extern void ima_post_path_mknod(struct mnt_idmap *idmap, - struct dentry *dentry); extern int ima_file_hash(struct file *file, char *buf, size_t buf_size); extern int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size); extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size); @@ -58,68 +40,6 @@ static inline enum hash_algo ima_get_current_hash_algo(void) return HASH_ALGO__LAST; } -static inline int ima_bprm_check(struct linux_binprm *bprm) -{ - return 0; -} - -static inline int ima_file_check(struct file *file, int mask) -{ - return 0; -} - -static inline void ima_post_create_tmpfile(struct mnt_idmap *idmap, - struct inode *inode) -{ -} - -static inline void ima_file_free(struct file *file) -{ - return; -} - -static inline int ima_file_mmap(struct file *file, unsigned long reqprot, - unsigned long prot, unsigned long flags) -{ - return 0; -} - -static inline int ima_file_mprotect(struct vm_area_struct *vma, - unsigned long reqprot, unsigned long prot) -{ - return 0; -} - -static inline int ima_load_data(enum kernel_load_data_id id, bool contents) -{ - return 0; -} - -static inline int ima_post_load_data(char *buf, loff_t size, - enum kernel_load_data_id id, - char *description) -{ - return 0; -} - -static inline int ima_read_file(struct file *file, enum kernel_read_file_id id, - bool contents) -{ - return 0; -} - -static inline int ima_post_read_file(struct file *file, char *buf, loff_t size, - enum kernel_read_file_id id) -{ - return 0; -} - -static inline void ima_post_path_mknod(struct mnt_idmap *idmap, - struct dentry *dentry) -{ - return; -} - static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size) { return -EOPNOTSUPP; @@ -170,20 +90,6 @@ static inline void ima_add_kexec_buffer(struct kimage *image) {} #endif -#ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS -extern void ima_post_key_create_or_update(struct key *keyring, - struct key *key, - const void *payload, size_t plen, - unsigned long flags, bool create); -#else -static inline void ima_post_key_create_or_update(struct key *keyring, - struct key *key, - const void *payload, - size_t plen, - unsigned long flags, - bool create) {} -#endif /* CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS */ - #ifdef CONFIG_IMA_APPRAISE extern bool is_ima_appraise_enabled(void); extern void ima_inode_post_setattr(struct mnt_idmap *idmap, @@ -256,14 +162,4 @@ static inline bool ima_appraise_signature(enum kernel_read_file_id func) return false; } #endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */ - -#if defined(CONFIG_IMA) && defined(CONFIG_INTEGRITY_ASYMMETRIC_KEYS) -extern int ima_kernel_module_request(char *kmod_name); -#else -static inline int ima_kernel_module_request(char *kmod_name) -{ - return 0; -} - -#endif #endif /* _LINUX_IMA_H */ diff --git a/include/uapi/linux/lsm.h b/include/uapi/linux/lsm.h index f8aef9ade549..b3b7fd699b63 100644 --- a/include/uapi/linux/lsm.h +++ b/include/uapi/linux/lsm.h @@ -62,6 +62,7 @@ struct lsm_ctx { #define LSM_ID_LOCKDOWN 108 #define LSM_ID_BPF 109 #define LSM_ID_LANDLOCK 110 +#define LSM_ID_IMA 111 /* * LSM_ATTR_XXX definitions identify different LSM attributes diff --git a/security/integrity/Makefile b/security/integrity/Makefile index d0ffe37dc1d6..92b63039c654 100644 --- a/security/integrity/Makefile +++ b/security/integrity/Makefile @@ -18,5 +18,6 @@ integrity-$(CONFIG_LOAD_IPL_KEYS) += platform_certs/load_ipl_s390.o integrity-$(CONFIG_LOAD_PPC_KEYS) += platform_certs/efi_parser.o \ platform_certs/load_powerpc.o \ platform_certs/keyring_handler.o +# The relative order of the 'ima' and 'evm' LSMs depends on the order below. obj-$(CONFIG_IMA) += ima/ obj-$(CONFIG_EVM) += evm/ diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig index b98bfe9efd0c..475c32615006 100644 --- a/security/integrity/ima/Kconfig +++ b/security/integrity/ima/Kconfig @@ -8,6 +8,7 @@ config IMA select CRYPTO_HMAC select CRYPTO_SHA1 select CRYPTO_HASH_INFO + select SECURITY_PATH select TCG_TPM if HAS_IOMEM select TCG_TIS if TCG_TPM && X86 select TCG_CRB if TCG_TPM && ACPI diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index c29db699c996..c0412100023e 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -127,6 +127,12 @@ void ima_load_kexec_buffer(void); static inline void ima_load_kexec_buffer(void) {} #endif /* CONFIG_HAVE_IMA_KEXEC */ +#ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS +void ima_post_key_create_or_update(struct key *keyring, struct key *key, + const void *payload, size_t plen, + unsigned long flags, bool create); +#endif + /* * The default binary_runtime_measurements list format is defined as the * platform native format. The canonical format is defined as little-endian. diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 3891b83efdb3..d0826e864c29 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -189,7 +189,7 @@ static void ima_check_last_writer(struct integrity_iint_cache *iint, * * Flag files that changed, based on i_version */ -void ima_file_free(struct file *file) +static void ima_file_free(struct file *file) { struct inode *inode = file_inode(file); struct integrity_iint_cache *iint; @@ -427,8 +427,8 @@ out: * On success return 0. On integrity appraisal error, assuming the file * is in policy and IMA-appraisal is in enforcing mode, return -EACCES. */ -int ima_file_mmap(struct file *file, unsigned long reqprot, - unsigned long prot, unsigned long flags) +static int ima_file_mmap(struct file *file, unsigned long reqprot, + unsigned long prot, unsigned long flags) { u32 secid; int ret; @@ -466,8 +466,8 @@ int ima_file_mmap(struct file *file, unsigned long reqprot, * * On mprotect change success, return 0. On failure, return -EACESS. */ -int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, - unsigned long prot) +static int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, + unsigned long prot) { struct ima_template_desc *template = NULL; struct file *file; @@ -525,7 +525,7 @@ int ima_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, * On success return 0. On integrity appraisal error, assuming the file * is in policy and IMA-appraisal is in enforcing mode, return -EACCES. */ -int ima_bprm_check(struct linux_binprm *bprm) +static int ima_bprm_check(struct linux_binprm *bprm) { int ret; u32 secid; @@ -551,7 +551,7 @@ int ima_bprm_check(struct linux_binprm *bprm) * On success return 0. On integrity appraisal error, assuming the file * is in policy and IMA-appraisal is in enforcing mode, return -EACCES. */ -int ima_file_check(struct file *file, int mask) +static int ima_file_check(struct file *file, int mask) { u32 secid; @@ -560,7 +560,6 @@ int ima_file_check(struct file *file, int mask) mask & (MAY_READ | MAY_WRITE | MAY_EXEC | MAY_APPEND), FILE_CHECK); } -EXPORT_SYMBOL_GPL(ima_file_check); static int __ima_inode_hash(struct inode *inode, struct file *file, char *buf, size_t buf_size) @@ -685,8 +684,9 @@ EXPORT_SYMBOL_GPL(ima_inode_hash); * Skip calling process_measurement(), but indicate which newly, created * tmpfiles are in policy. */ -void ima_post_create_tmpfile(struct mnt_idmap *idmap, - struct inode *inode) +static void ima_post_create_tmpfile(struct mnt_idmap *idmap, + struct inode *inode) + { struct integrity_iint_cache *iint; int must_appraise; @@ -717,8 +717,7 @@ void ima_post_create_tmpfile(struct mnt_idmap *idmap, * Mark files created via the mknodat syscall as new, so that the * file data can be written later. */ -void ima_post_path_mknod(struct mnt_idmap *idmap, - struct dentry *dentry) +static void ima_post_path_mknod(struct mnt_idmap *idmap, struct dentry *dentry) { struct integrity_iint_cache *iint; struct inode *inode = dentry->d_inode; @@ -753,8 +752,8 @@ void ima_post_path_mknod(struct mnt_idmap *idmap, * * For permission return 0, otherwise return -EACCES. */ -int ima_read_file(struct file *file, enum kernel_read_file_id read_id, - bool contents) +static int ima_read_file(struct file *file, enum kernel_read_file_id read_id, + bool contents) { enum ima_hooks func; u32 secid; @@ -803,8 +802,8 @@ const int read_idmap[READING_MAX_ID] = { * On success return 0. On integrity appraisal error, assuming the file * is in policy and IMA-appraisal is in enforcing mode, return -EACCES. */ -int ima_post_read_file(struct file *file, char *buf, loff_t size, - enum kernel_read_file_id read_id) +static int ima_post_read_file(struct file *file, char *buf, loff_t size, + enum kernel_read_file_id read_id) { enum ima_hooks func; u32 secid; @@ -837,7 +836,7 @@ int ima_post_read_file(struct file *file, char *buf, loff_t size, * * For permission return 0, otherwise return -EACCES. */ -int ima_load_data(enum kernel_load_data_id id, bool contents) +static int ima_load_data(enum kernel_load_data_id id, bool contents) { bool ima_enforce, sig_enforce; @@ -891,9 +890,9 @@ int ima_load_data(enum kernel_load_data_id id, bool contents) * On success return 0. On integrity appraisal error, assuming the file * is in policy and IMA-appraisal is in enforcing mode, return -EACCES. */ -int ima_post_load_data(char *buf, loff_t size, - enum kernel_load_data_id load_id, - char *description) +static int ima_post_load_data(char *buf, loff_t size, + enum kernel_load_data_id load_id, + char *description) { if (load_id == LOADING_FIRMWARE) { if ((ima_appraise & IMA_APPRAISE_FIRMWARE) && @@ -1114,7 +1113,7 @@ EXPORT_SYMBOL_GPL(ima_measure_critical_data); * * Return: Zero if it is safe to load the kernel module, -EINVAL otherwise. */ -int ima_kernel_module_request(char *kmod_name) +static int ima_kernel_module_request(char *kmod_name) { if (strncmp(kmod_name, "crypto-pkcs1pad(rsa,", 20) == 0) return -EINVAL; @@ -1155,4 +1154,41 @@ static int __init init_ima(void) return error; } +static struct security_hook_list ima_hooks[] __ro_after_init = { + LSM_HOOK_INIT(bprm_check_security, ima_bprm_check), + LSM_HOOK_INIT(file_post_open, ima_file_check), + LSM_HOOK_INIT(inode_post_create_tmpfile, ima_post_create_tmpfile), + LSM_HOOK_INIT(file_release, ima_file_free), + LSM_HOOK_INIT(mmap_file, ima_file_mmap), + LSM_HOOK_INIT(file_mprotect, ima_file_mprotect), + LSM_HOOK_INIT(kernel_load_data, ima_load_data), + LSM_HOOK_INIT(kernel_post_load_data, ima_post_load_data), + LSM_HOOK_INIT(kernel_read_file, ima_read_file), + LSM_HOOK_INIT(kernel_post_read_file, ima_post_read_file), + LSM_HOOK_INIT(path_post_mknod, ima_post_path_mknod), +#ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS + LSM_HOOK_INIT(key_post_create_or_update, ima_post_key_create_or_update), +#endif +#ifdef CONFIG_INTEGRITY_ASYMMETRIC_KEYS + LSM_HOOK_INIT(kernel_module_request, ima_kernel_module_request), +#endif +}; + +static const struct lsm_id ima_lsmid = { + .name = "ima", + .id = LSM_ID_IMA, +}; + +static int __init init_ima_lsm(void) +{ + security_add_hooks(ima_hooks, ARRAY_SIZE(ima_hooks), &ima_lsmid); + return 0; +} + +DEFINE_LSM(ima) = { + .name = "ima", + .init = init_ima_lsm, + .order = LSM_ORDER_LAST, +}; + late_initcall(init_ima); /* Start IMA after the TPM is available */ diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h index 9561db7cf6b4..59eaddd84434 100644 --- a/security/integrity/integrity.h +++ b/security/integrity/integrity.h @@ -18,6 +18,7 @@ #include #include #include +#include /* iint action cache flags */ #define IMA_MEASURE 0x00000001 diff --git a/security/keys/key.c b/security/keys/key.c index 31a8b9408b7c..560790038329 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -13,7 +13,6 @@ #include #include #include -#include #include #include "internal.h" @@ -932,8 +931,6 @@ static key_ref_t __key_create_or_update(key_ref_t keyring_ref, security_key_post_create_or_update(keyring, key, payload, plen, flags, true); - ima_post_key_create_or_update(keyring, key, payload, plen, - flags, true); key_ref = make_key_ref(key, is_key_possessed(keyring_ref)); @@ -965,13 +962,9 @@ error: key_ref = __key_update(key_ref, &prep); - if (!IS_ERR(key_ref)) { + if (!IS_ERR(key_ref)) security_key_post_create_or_update(keyring, key, payload, plen, flags, false); - ima_post_key_create_or_update(keyring, key, - payload, plen, - flags, false); - } goto error_free_prep; } diff --git a/security/security.c b/security/security.c index bc3c6790aeaf..8495890a5a37 100644 --- a/security/security.c +++ b/security/security.c @@ -50,7 +50,8 @@ (IS_ENABLED(CONFIG_SECURITY_SAFESETID) ? 1 : 0) + \ (IS_ENABLED(CONFIG_SECURITY_LOCKDOWN_LSM) ? 1 : 0) + \ (IS_ENABLED(CONFIG_BPF_LSM) ? 1 : 0) + \ - (IS_ENABLED(CONFIG_SECURITY_LANDLOCK) ? 1 : 0)) + (IS_ENABLED(CONFIG_SECURITY_LANDLOCK) ? 1 : 0) + \ + (IS_ENABLED(CONFIG_IMA) ? 1 : 0)) /* * These are descriptions of the reasons that can be passed to the @@ -1182,12 +1183,7 @@ int security_bprm_creds_from_file(struct linux_binprm *bprm, const struct file * */ int security_bprm_check(struct linux_binprm *bprm) { - int ret; - - ret = call_int_hook(bprm_check_security, 0, bprm); - if (ret) - return ret; - return ima_bprm_check(bprm); + return call_int_hook(bprm_check_security, 0, bprm); } /** @@ -2895,13 +2891,8 @@ static inline unsigned long mmap_prot(struct file *file, unsigned long prot) int security_mmap_file(struct file *file, unsigned long prot, unsigned long flags) { - unsigned long prot_adj = mmap_prot(file, prot); - int ret; - - ret = call_int_hook(mmap_file, 0, file, prot, prot_adj, flags); - if (ret) - return ret; - return ima_file_mmap(file, prot, prot_adj, flags); + return call_int_hook(mmap_file, 0, file, prot, mmap_prot(file, prot), + flags); } /** @@ -2930,12 +2921,7 @@ int security_mmap_addr(unsigned long addr) int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, unsigned long prot) { - int ret; - - ret = call_int_hook(file_mprotect, 0, vma, reqprot, prot); - if (ret) - return ret; - return ima_file_mprotect(vma, reqprot, prot); + return call_int_hook(file_mprotect, 0, vma, reqprot, prot); } /** @@ -3244,12 +3230,7 @@ int security_kernel_create_files_as(struct cred *new, struct inode *inode) */ int security_kernel_module_request(char *kmod_name) { - int ret; - - ret = call_int_hook(kernel_module_request, 0, kmod_name); - if (ret) - return ret; - return ima_kernel_module_request(kmod_name); + return call_int_hook(kernel_module_request, 0, kmod_name); } /** @@ -3265,12 +3246,7 @@ int security_kernel_module_request(char *kmod_name) int security_kernel_read_file(struct file *file, enum kernel_read_file_id id, bool contents) { - int ret; - - ret = call_int_hook(kernel_read_file, 0, file, id, contents); - if (ret) - return ret; - return ima_read_file(file, id, contents); + return call_int_hook(kernel_read_file, 0, file, id, contents); } EXPORT_SYMBOL_GPL(security_kernel_read_file); @@ -3290,12 +3266,7 @@ EXPORT_SYMBOL_GPL(security_kernel_read_file); int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, enum kernel_read_file_id id) { - int ret; - - ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); - if (ret) - return ret; - return ima_post_read_file(file, buf, size, id); + return call_int_hook(kernel_post_read_file, 0, file, buf, size, id); } EXPORT_SYMBOL_GPL(security_kernel_post_read_file); @@ -3310,12 +3281,7 @@ EXPORT_SYMBOL_GPL(security_kernel_post_read_file); */ int security_kernel_load_data(enum kernel_load_data_id id, bool contents) { - int ret; - - ret = call_int_hook(kernel_load_data, 0, id, contents); - if (ret) - return ret; - return ima_load_data(id, contents); + return call_int_hook(kernel_load_data, 0, id, contents); } EXPORT_SYMBOL_GPL(security_kernel_load_data); @@ -3337,13 +3303,8 @@ int security_kernel_post_load_data(char *buf, loff_t size, enum kernel_load_data_id id, char *description) { - int ret; - - ret = call_int_hook(kernel_post_load_data, 0, buf, size, id, - description); - if (ret) - return ret; - return ima_post_load_data(buf, size, id, description); + return call_int_hook(kernel_post_load_data, 0, buf, size, id, + description); } EXPORT_SYMBOL_GPL(security_kernel_post_load_data); diff --git a/tools/testing/selftests/lsm/lsm_list_modules_test.c b/tools/testing/selftests/lsm/lsm_list_modules_test.c index 9df29b1e3497..17333787cb2f 100644 --- a/tools/testing/selftests/lsm/lsm_list_modules_test.c +++ b/tools/testing/selftests/lsm/lsm_list_modules_test.c @@ -122,6 +122,9 @@ TEST(correct_lsm_list_modules) case LSM_ID_LANDLOCK: name = "landlock"; break; + case LSM_ID_IMA: + name = "ima"; + break; default: name = "INVALID"; break;