[PATCH 1/3] ima: add error mesage to kexec_load

[Mimi Zohar]

Reject the kexec_load syscall with some indication of the problem.

Signed-off-by: Mimi Zohar <zo...@linux.ibm.com>
---
 security/integrity/ima/ima_main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/security/integrity/ima/ima_main.c 
b/security/integrity/ima/ima_main.c
index 41e4771980d5..df0b2ee49fa2 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -513,8 +513,10 @@ int ima_load_data(enum kernel_load_data_id id)
        switch (id) {
        case LOADING_KEXEC_IMAGE:
                if (IS_ENABLED(CONFIG_KEXEC_VERIFY_SIG)
-                   && arch_ima_get_secureboot())
+                   && arch_ima_get_secureboot()) {
+                       pr_err("impossible to appraise a kernel image without a 
file descriptor; try using kexec_file_load syscall.\n");
                        return -EACCES;
+               }
 
                if (ima_enforce && (ima_appraise & IMA_APPRAISE_KEXEC)) {
                        pr_err("impossible to appraise a kernel image without a 
file descriptor; try using kexec_file_load syscall.\n");
-- 
2.7.5