[PATCH] m68k stack bounds checking

From: William Lee Irwin III <wli@holomorphy.com>

The stack is now shared with struct thread_info on most arches, not task_t.
This mostly affects get_wchan() and stack usage debug.

diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index fc2c753c332bc829b356db57d80208104f3672c5..a270b5ff3aca73874db8f500ee5949808b9a9a85 100644 (file)
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -399,7 +399,7 @@ unsigned long get_wchan(struct task_struct *p)
        stack_page = (unsigned long)(p->thread_info);
        fp = ((struct switch_stack *)p->thread.ksp)->a6;
        do {
-               if (fp < stack_page+sizeof(struct task_struct) ||
+               if (fp < stack_page+sizeof(struct thread_info) ||
                    fp >= 8184+stack_page)
                        return 0;
                pc = ((unsigned long *)fp)[1];