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s390/ipl: fix virtual vs physical address confusion 

The value of ipl_cert_list_addr boot variable contains
a physical address, which is used directly. That works
because virtual and physical address spaces are currently
the same, but otherwise it is wrong.

While at it, fix also a comment for the platform keyring.

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lore.kernel.org/r/20230816132942.2540411-1-agordeev@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2023-08-16 15:29:42 +02:00 committed by Heiko Carstens
parent 386cb81e4b
commit 979fe44af8
3 changed files with 5 additions and 5 deletions
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4
arch/s390/kernel/machine_kexec_file.c
View File

@ -188,7 +188,7 @@ static int kexec_file_add_ipl_report(struct kimage *image,
data->memsz = ALIGN(data->memsz, PAGE_SIZE);
buf.mem = data->memsz;
ptr = (void *)ipl_cert_list_addr;
ptr = __va(ipl_cert_list_addr);
end = ptr + ipl_cert_list_size;
ncerts = 0;
while (ptr < end) {
@ -200,7 +200,7 @@ static int kexec_file_add_ipl_report(struct kimage *image,
addr = data->memsz + data->report->size;
addr += ncerts * sizeof(struct ipl_rb_certificate_entry);
ptr = (void *)ipl_cert_list_addr;
ptr = __va(ipl_cert_list_addr);
while (ptr < end) {
len = *(unsigned int *)ptr;
ptr += sizeof(len);

2
arch/s390/kernel/setup.c
View File

@ -875,7 +875,7 @@ static void __init log_component_list(void)
pr_info("Linux is running with Secure-IPL enabled\n");
else
pr_info("Linux is running with Secure-IPL disabled\n");
ptr = (void *) early_ipl_comp_list_addr;
ptr = __va(early_ipl_comp_list_addr);
end = (void *) ptr + early_ipl_comp_list_size;
pr_info("The IPL report contains the following components:\n");
while (ptr < end) {

4
security/integrity/platform_certs/load_ipl_s390.c
View File

@ -22,8 +22,8 @@ static int __init load_ipl_certs(void)
if (!ipl_cert_list_addr)
return 0;
/* Copy the certificates to the system keyring */
ptr = (void *) ipl_cert_list_addr;
/* Copy the certificates to the platform keyring */
ptr = __va(ipl_cert_list_addr);
end = ptr + ipl_cert_list_size;
while ((void *) ptr < end) {
len = *(unsigned int *) ptr;