diff options
Diffstat (limited to 'security/integrity/ima/ima_main.c')
| -rw-r--r-- | security/integrity/ima/ima_main.c | 45 |
1 files changed, 37 insertions, 8 deletions
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 1be99a27a7f3..757765354158 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -153,8 +153,8 @@ void ima_file_free(struct file *file) ima_check_last_writer(iint, inode, file); } -static int process_measurement(struct file *file, int mask, - enum ima_hooks func, int opened) +static int process_measurement(struct file *file, char *buf, loff_t size, + int mask, enum ima_hooks func, int opened) { struct inode *inode = file_inode(file); struct integrity_iint_cache *iint = NULL; @@ -226,7 +226,7 @@ static int process_measurement(struct file *file, int mask, hash_algo = ima_get_hash_algo(xattr_value, xattr_len); - rc = ima_collect_measurement(iint, file, hash_algo); + rc = ima_collect_measurement(iint, file, buf, size, hash_algo); if (rc != 0) { if (file->f_flags & O_DIRECT) rc = (iint->flags & IMA_PERMIT_DIRECTIO) ? 0 : -EACCES; @@ -273,7 +273,8 @@ out: int ima_file_mmap(struct file *file, unsigned long prot) { if (file && (prot & PROT_EXEC)) - return process_measurement(file, MAY_EXEC, MMAP_CHECK, 0); + return process_measurement(file, NULL, 0, MAY_EXEC, + MMAP_CHECK, 0); return 0; } @@ -292,7 +293,8 @@ int ima_file_mmap(struct file *file, unsigned long prot) */ int ima_bprm_check(struct linux_binprm *bprm) { - return process_measurement(bprm->file, MAY_EXEC, BPRM_CHECK, 0); + return process_measurement(bprm->file, NULL, 0, MAY_EXEC, + BPRM_CHECK, 0); } /** @@ -307,7 +309,7 @@ int ima_bprm_check(struct linux_binprm *bprm) */ int ima_file_check(struct file *file, int mask, int opened) { - return process_measurement(file, + return process_measurement(file, NULL, 0, mask & (MAY_READ | MAY_WRITE | MAY_EXEC), FILE_CHECK, opened); } @@ -332,7 +334,7 @@ int ima_module_check(struct file *file) #endif return 0; /* We rely on module signature checking */ } - return process_measurement(file, MAY_EXEC, MODULE_CHECK, 0); + return process_measurement(file, NULL, 0, MAY_EXEC, MODULE_CHECK, 0); } int ima_fw_from_file(struct file *file, char *buf, size_t size) @@ -343,7 +345,34 @@ int ima_fw_from_file(struct file *file, char *buf, size_t size) return -EACCES; /* INTEGRITY_UNKNOWN */ return 0; } - return process_measurement(file, MAY_EXEC, FIRMWARE_CHECK, 0); + return process_measurement(file, NULL, 0, MAY_EXEC, FIRMWARE_CHECK, 0); +} + +/** + * ima_post_read_file - in memory collect/appraise/audit measurement + * @file: pointer to the file to be measured/appraised/audit + * @buf: pointer to in memory file contents + * @size: size of in memory file contents + * @read_id: caller identifier + * + * Measure/appraise/audit in memory file based on policy. Policy rules + * are written in terms of a policy identifier. + * + * 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, void *buf, loff_t size, + enum kernel_read_file_id read_id) +{ + enum ima_hooks func = FILE_CHECK; + + if (!file || !buf || size == 0) { /* should never happen */ + if (ima_appraise & IMA_APPRAISE_ENFORCE) + return -EACCES; + return 0; + } + + return process_measurement(file, buf, size, MAY_READ, func, 0); } static int __init init_ima(void) |