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 3bc6527c95af3ec3bec6f6c3397d46437d72aee5..6716584e48ab4c052a3d7cf941a1781949f885e6 100644 (file)
--- a/arch/sparc/kernel/kprobes.c
+++ b/arch/sparc/kernel/kprobes.c
@@ -46,6 +46,9 @@ struct kretprobe_blackpoint kretprobe_blacklist[] = {{NULL, NULL}};
 
 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]);