sparc: Validate that kprobe address is 4-byte aligned.
Otherwise it isn't a valid instruction address.
This is the sparc equivalent of commit
b46b3d70c9c017d7c4ec49f7f3ffd0af5a622277 (kprobes: Checks probe
address is instruction boudary on x86)
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/kprobes.c b/arch/sparc/kernel/kprobes.c
index 3bc6527..6716584 100644
--- a/arch/sparc/kernel/kprobes.c
+++ b/arch/sparc/kernel/kprobes.c
@@ -46,6 +46,9 @@
int __kprobes arch_prepare_kprobe(struct kprobe *p)
{
+ if ((unsigned long) p->addr & 0x3UL)
+ return -EILSEQ;
+
p->ainsn.insn[0] = *p->addr;
flushi(&p->ainsn.insn[0]);