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sparc: Validate that kprobe address is 4-byte aligned. 

Otherwise it isn't a valid instruction address.

This is the sparc equivalent of commit
b46b3d70c9 (kprobes: Checks probe
address is instruction boudary on x86)

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2009-12-09 23:57:24 -08:00
parent 08a036d583
commit 936cf25178
1 changed files with 3 additions and 0 deletions
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3
arch/sparc/kernel/kprobes.c
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@ -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]);