diff options
| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2016-12-19 16:22:48 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-20 09:48:44 -0800 |
| commit | 7b8589cc29e7c35dcfd2d5138979f17b48f90110 (patch) | |
| tree | 034068b5b20ee7e55247197c5df5d94e6aeadee6 /kernel/kexec_file.c | |
| parent | ab6b1d1fc4aae6b8bd6fb1422405568094c9b40f (diff) | |
| download | lwn-7b8589cc29e7c35dcfd2d5138979f17b48f90110.tar.gz lwn-7b8589cc29e7c35dcfd2d5138979f17b48f90110.zip | |
ima: on soft reboot, save the measurement list
The TPM PCRs are only reset on a hard reboot. In order to validate a
TPM's quote after a soft reboot (eg. kexec -e), the IMA measurement
list of the running kernel must be saved and restored on boot.
This patch uses the kexec buffer passing mechanism to pass the
serialized IMA binary_runtime_measurements to the next kernel.
Link: http://lkml.kernel.org/r/1480554346-29071-7-git-send-email-zohar@linux.vnet.ibm.com
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
Cc: Andreas Steffen <andreas.steffen@strongswan.org>
Cc: Josh Sklar <sklar@linux.vnet.ibm.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kexec_file.c')
| -rw-r--r-- | kernel/kexec_file.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index 0c2df7f73792..b56a558e406d 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -19,6 +19,7 @@ #include <linux/mutex.h> #include <linux/list.h> #include <linux/fs.h> +#include <linux/ima.h> #include <crypto/hash.h> #include <crypto/sha.h> #include <linux/syscalls.h> @@ -132,6 +133,9 @@ kimage_file_prepare_segments(struct kimage *image, int kernel_fd, int initrd_fd, return ret; image->kernel_buf_len = size; + /* IMA needs to pass the measurement list to the next kernel. */ + ima_add_kexec_buffer(image); + /* Call arch image probe handlers */ ret = arch_kexec_kernel_image_probe(image, image->kernel_buf, image->kernel_buf_len); |