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-rw-r--r--arch/s390/kernel/kprobes.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index c52fdf290301..59a9c35c4598 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -60,6 +60,8 @@ struct kprobe_insn_cache kprobe_dmainsn_slots = {
static int __kprobes is_prohibited_opcode(kprobe_opcode_t *insn)
{
+ if (!is_known_insn((unsigned char *)insn))
+ return -EINVAL;
switch (insn[0] >> 8) {
case 0x0c: /* bassm */
case 0x0b: /* bsm */