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ima: force signature verification when CONFIG_KEXEC_SIG is configured

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Currently, an unsigned kernel could be kexec'ed when IMA arch specific
policy is configured unless lockdown is enabled. Enforce kernel
signature verification check in the kexec_file_load syscall when IMA
arch specific policy is configured.

Fixes: 99d5cadfde ("kexec_file: split KEXEC_VERIFY_SIG into KEXEC_SIG and KEXEC_SIG_FORCE")
Reported-and-suggested-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Coiby Xu
2022-07-13 15:21:11 +08:00
committed by Mimi Zohar
parent d2ee2cfc4a
commit af16df54b8
3 changed files with 18 additions and 1 deletions
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2
security/integrity/ima/ima_efi.c
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@@ -67,6 +67,8 @@ const char * const *arch_get_ima_policy(void)
if (IS_ENABLED(CONFIG_IMA_ARCH_POLICY) && arch_ima_get_secureboot()) {
if (IS_ENABLED(CONFIG_MODULE_SIG))
set_module_sig_enforced();
if (IS_ENABLED(CONFIG_KEXEC_SIG))
set_kexec_sig_enforced();
return sb_arch_rules;
}
return NULL;