Currently for s390, lockdown doesn't prevent unsigned kernel image from being kexec'ed when secure IPL is disabled. Fix it by always verifying the signature regardless secure IPL is enabled or not. Fixes: 155bdd30af17 ("kexec_file: Restrict at runtime if the kernel is locked down") Cc: Matthew Garrett <mjg59@xxxxxxxxxxxxx> Cc: Jiri Bohac <jbohac@xxxxxxx> Cc: David Howells <dhowells@xxxxxxxxxx> Cc: Philipp Rudo <prudo@xxxxxxxxxx> Cc: kexec@xxxxxxxxxxxxxxxxxxx Cc: linux-s390@xxxxxxxxxxxxxxx Signed-off-by: Coiby Xu <coxu@xxxxxxxxxx> --- arch/s390/kernel/machine_kexec_file.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/arch/s390/kernel/machine_kexec_file.c b/arch/s390/kernel/machine_kexec_file.c index fc6d5f58debe..627685426ac2 100644 --- a/arch/s390/kernel/machine_kexec_file.c +++ b/arch/s390/kernel/machine_kexec_file.c @@ -33,10 +33,6 @@ int s390_verify_sig(const char *kernel, unsigned long kernel_len) unsigned long sig_len; int ret; - /* Skip signature verification when not secure IPLed. */ - if (!ipl_secure_flag) - return 0; - if (marker_len > kernel_len) return -EKEYREJECTED; -- 2.38.1 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec