diff options
| author | Steven Chen <chenste@linux.microsoft.com> | 2025-04-21 15:25:10 -0700 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2025-04-29 15:54:53 -0400 |
| commit | 9ee8888a80fe2bd20ce929ffbc1dedd57607a778 (patch) | |
| tree | 7e86ed6375fc6ac41d8fd31001b55c8033cd59fd /include/linux/kexec.h | |
| parent | 0091d9241ea24c5275be4a3e5a032862fd9de9ec (diff) | |
ima: kexec: skip IMA segment validation after kexec soft reboot
Currently, the function kexec_calculate_store_digests() calculates and
stores the digest of the segment during the kexec_file_load syscall,
where the IMA segment is also allocated.
Later, the IMA segment will be updated with the measurement log at the
kexec execute stage when a kexec reboot is initiated. Therefore, the
digests should be updated for the IMA segment in the normal case. The
problem is that the content of memory segments carried over to the new
kernel during the kexec systemcall can be changed at kexec 'execute'
stage, but the size and the location of the memory segments cannot be
changed at kexec 'execute' stage.
To address this, skip the calculation and storage of the digest for the
IMA segment in kexec_calculate_store_digests() so that it is not added
to the purgatory_sha_regions.
With this change, the IMA segment is not included in the digest
calculation, storage, and verification.
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Co-developed-by: Tushar Sugandhi <tusharsu@linux.microsoft.com>
Signed-off-by: Tushar Sugandhi <tusharsu@linux.microsoft.com>
Signed-off-by: Steven Chen <chenste@linux.microsoft.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Acked-by: Baoquan He <bhe@redhat.com>
Tested-by: Stefan Berger <stefanb@linux.ibm.com> # ppc64/kvm
[zohar@linux.ibm.com: Fixed Signed-off-by tag to match author's email ]
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'include/linux/kexec.h')
| -rw-r--r-- | include/linux/kexec.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 805743208d19..53ef1b6c8712 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -369,6 +369,9 @@ struct kimage { phys_addr_t ima_buffer_addr; size_t ima_buffer_size; + + unsigned long ima_segment_index; + bool is_ima_segment_index_set; #endif /* Core ELF header buffer */ |