diff options
Diffstat (limited to 'security/integrity/ima/ima_main.c')
| -rw-r--r-- | security/integrity/ima/ima_main.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index f99ab1a3b0f0..cdd225f65a62 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -27,6 +27,7 @@ #include <linux/fs.h> #include <linux/iversion.h> #include <linux/evm.h> +#include <linux/crash_dump.h> #include "ima.h" @@ -38,11 +39,30 @@ int ima_appraise; int __ro_after_init ima_hash_algo = HASH_ALGO_SHA1; static int hash_setup_done; +static int ima_disabled __ro_after_init; static struct notifier_block ima_lsm_policy_notifier = { .notifier_call = ima_lsm_policy_change, }; +static int __init ima_setup(char *str) +{ + if (!is_kdump_kernel()) { + pr_info("Warning: ima setup option only permitted in kdump"); + return 1; + } + + if (strncmp(str, "off", 3) == 0) + ima_disabled = 1; + else if (strncmp(str, "on", 2) == 0) + ima_disabled = 0; + else + pr_err("Invalid ima setup option: \"%s\" , please specify ima=on|off.", str); + + return 1; +} +__setup("ima=", ima_setup); + static int __init hash_setup(char *str) { struct ima_template_desc *template_desc = ima_template_desc_current(); @@ -1186,6 +1206,12 @@ static int __init init_ima(void) { int error; + /*Note that turning IMA off is intentionally limited to kdump kernel.*/ + if (ima_disabled && is_kdump_kernel()) { + pr_info("IMA functionality is disabled"); + return 0; + } + ima_appraise_parse_cmdline(); ima_init_template_list(); hash_setup(CONFIG_IMA_DEFAULT_HASH); |