Secure storage access exceptions in vmalloc area need to be handled separately since folio_try_get() or virt_to_phys() do not work on such addresses. Given that there cannot be a valid access let such exceptions fail immediately. The kernel will either fixup or crash. Tested-by: Christian Borntraeger Signed-off-by: Heiko Carstens --- arch/s390/mm/fault.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index f150d97cac2e..e650cdfa2523 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -438,6 +438,8 @@ void do_secure_storage_access(struct pt_regs *regs) panic("Unexpected PGM 0x3d with TEID bit 61=0"); } if (is_kernel_fault(regs)) { + if (is_vmalloc_addr((void *)addr)) + return handle_fault_error_nolock(regs, 0); folio = virt_to_folio((void *)addr); if (unlikely(!folio_try_get(folio))) return; -- 2.53.0