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-rw-r--r--arch/m68k/kernel/signal.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index e2a9421c5797..87e7f3639839 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -651,7 +651,8 @@ static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
regs->vector = formatvec & 0xfff;
} else {
struct switch_stack *sw = (struct switch_stack *)regs - 1;
- unsigned long buf[fsize / 2]; /* yes, twice as much */
+ /* yes, twice as much as max(sizeof(frame.un.fmt<x>)) */
+ unsigned long buf[sizeof(((struct frame *)0)->un) / 2];
/* that'll make sure that expansion won't crap over data */
if (copy_from_user(buf + fsize / 4, fp, fsize))