Commit 34f77ac0 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds

[PATCH] m68knommu 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.
parent 6fd0e105
...@@ -421,7 +421,7 @@ unsigned long get_wchan(struct task_struct *p) ...@@ -421,7 +421,7 @@ unsigned long get_wchan(struct task_struct *p)
stack_page = (unsigned long)p; stack_page = (unsigned long)p;
fp = ((struct switch_stack *)p->thread.ksp)->a6; fp = ((struct switch_stack *)p->thread.ksp)->a6;
do { do {
if (fp < stack_page+sizeof(struct task_struct) || if (fp < stack_page+sizeof(struct thread_info) ||
fp >= 8184+stack_page) fp >= 8184+stack_page)
return 0; return 0;
pc = ((unsigned long *)fp)[1]; pc = ((unsigned long *)fp)[1];
......
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