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| author |   Eric Richter <erichte@linux.ibm.com> | 2018-10-09 23:00:37 +0530 |
|---|---|---|
| committer |   Mimi Zohar <zohar@linux.ibm.com> | 2018-12-11 07:13:41 -0500 |
| commit | d958083a8f6408e76850bc7394976050d7e43173 (patch) | |
| tree | 3d28df0a128bec514ed7ab644f909e3c2aea44c6 /include/linux/ima.h | |
| parent | ima: add support for arch specific policies (diff) | |
| download | linux-dev-d958083a8f6408e76850bc7394976050d7e43173.tar.xz linux-dev-d958083a8f6408e76850bc7394976050d7e43173.zip | |
x86/ima: define arch_get_ima_policy() for x86
On x86, there are two methods of verifying a kexec'ed kernel image
signature being loaded via the kexec_file_load syscall - an architecture
specific implementaton or a IMA KEXEC_KERNEL_CHECK appraisal rule. Neither
of these methods verify the kexec'ed kernel image signature being loaded
via the kexec_load syscall.
Secure boot enabled systems require kexec images to be signed. Therefore,
this patch loads an IMA KEXEC_KERNEL_CHECK policy rule on secure boot
enabled systems not configured with CONFIG_KEXEC_VERIFY_SIG enabled.
When IMA_APPRAISE_BOOTPARAM is configured, different IMA appraise modes
(eg. fix, log) can be specified on the boot command line, allowing unsigned
or invalidly signed kernel images to be kexec'ed. This patch permits
enabling IMA_APPRAISE_BOOTPARAM or IMA_ARCH_POLICY, but not both.
Signed-off-by: Eric Richter <erichte@linux.ibm.com>
Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'include/linux/ima.h')
| -rw-r--r-- | include/linux/ima.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/ima.h b/include/linux/ima.h index 62c5241b0899..5ab9134d4fd7 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -32,17 +32,18 @@ extern void ima_add_kexec_buffer(struct kimage *image); #ifdef CONFIG_X86 extern bool arch_ima_get_secureboot(void); +extern const char * const *arch_get_ima_policy(void); #else static inline bool arch_ima_get_secureboot(void) { return false; } -#endif static inline const char * const *arch_get_ima_policy(void) { return NULL; } +#endif #else static inline int ima_bprm_check(struct linux_binprm *bprm) |