diff options
Diffstat (limited to 'arch/x86/kernel/irq_64.c')
| -rw-r--r-- | arch/x86/kernel/irq_64.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c index 54e2b2b2e250..d04d3ecded62 100644 --- a/arch/x86/kernel/irq_64.c +++ b/arch/x86/kernel/irq_64.c @@ -38,6 +38,7 @@ int sysctl_panic_on_stackoverflow; static inline void stack_overflow_check(struct pt_regs *regs) { #ifdef CONFIG_DEBUG_STACKOVERFLOW +#define STACK_TOP_MARGIN 128 struct orig_ist *oist; u64 irq_stack_top, irq_stack_bottom; u64 estack_top, estack_bottom; @@ -47,17 +48,18 @@ static inline void stack_overflow_check(struct pt_regs *regs) return; if (regs->sp >= curbase + sizeof(struct thread_info) + - sizeof(struct pt_regs) + 128 && + sizeof(struct pt_regs) + STACK_TOP_MARGIN && regs->sp <= curbase + THREAD_SIZE) return; - irq_stack_top = (u64)__get_cpu_var(irq_stack_union.irq_stack); + irq_stack_top = (u64)__get_cpu_var(irq_stack_union.irq_stack) + + STACK_TOP_MARGIN; irq_stack_bottom = (u64)__get_cpu_var(irq_stack_ptr); if (regs->sp >= irq_stack_top && regs->sp <= irq_stack_bottom) return; oist = &__get_cpu_var(orig_ist); - estack_top = (u64)oist->ist[0] - EXCEPTION_STKSZ; + estack_top = (u64)oist->ist[0] - EXCEPTION_STKSZ + STACK_TOP_MARGIN; estack_bottom = (u64)oist->ist[N_EXCEPTION_STACKS - 1]; if (regs->sp >= estack_top && regs->sp <= estack_bottom) return; |