X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=arch%2Fpowerpc%2Fperf%2Fcallchain.c;h=9e254aed1f61a2883f08bb9d0606a04ae52327f3;hb=c03be0a3f3cc656eab5c427b78959b8f1b169a11;hp=082f6d0308a472916365d203e2cc19e1bd4563db;hpb=2d02e7d7d04f54fa573685a92c4a34eb8a76c9de;p=linux-2.6-microblaze.git

diff --git a/arch/powerpc/perf/callchain.c b/arch/powerpc/perf/callchain.c
index 082f6d0308a4..9e254aed1f61 100644
--- a/arch/powerpc/perf/callchain.c
+++ b/arch/powerpc/perf/callchain.c
@@ -61,12 +61,13 @@ perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *re
 		next_sp = fp[0];
 
 		if (next_sp == sp + STACK_INT_FRAME_SIZE &&
+		    validate_sp(sp, current, STACK_INT_FRAME_SIZE) &&
 		    fp[STACK_FRAME_MARKER] == STACK_FRAME_REGS_MARKER) {
 			/*
 			 * This looks like an interrupt frame for an
 			 * interrupt that occurred in the kernel
 			 */
-			regs = (struct pt_regs *)(sp + STACK_FRAME_OVERHEAD);
+			regs = (struct pt_regs *)(sp + STACK_INT_FRAME_REGS);
 			next_ip = regs->nip;
 			lr = regs->link;
 			level = 0;