ima: do not copy measurement list to kdump kernel

Kdump kernel doesn't need IMA to do integrity measurement.
Hence the measurement list in 1st kernel doesn't need to be copied to
kdump kernel.

Here skip allocating buffer for measurement list copying if loading
kdump kernel. Then there won't be the later handling related to
ima_kexec_buffer.

Signed-off-by: Steven Chen <chenste@linux.microsoft.com>
Tested-by: Baoquan He <bhe@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

diff --git a/security/integrity/ima/ima_kexec.c b/security/integrity/ima/ima_kexec.c
index 38cb2500f4c3cc37894761d25e66ce0ad04b42d8..7362f68f2d8b17dadf103130acf437358c59ad9e 100644 (file)
--- a/security/integrity/ima/ima_kexec.c
+++ b/security/integrity/ima/ima_kexec.c
@@ -146,6 +146,9 @@ void ima_add_kexec_buffer(struct kimage *image)
        void *kexec_buffer = NULL;
        int ret;
 
+       if (image->type == KEXEC_TYPE_CRASH)
+               return;
+
        /*
         * Reserve extra memory for measurements added during kexec.
         */