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Diffstat (limited to 'arch/arm64/mm/fault.c')
-rw-r--r--arch/arm64/mm/fault.c39
1 files changed, 24 insertions, 15 deletions
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index e22849a90..b1166d1e5 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -262,10 +262,6 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr,
tsk = current;
mm = tsk->mm;
- /* Enable interrupts if they were enabled in the parent context. */
- if (interrupts_enabled(regs))
- local_irq_enable();
-
/*
* If we're in an interrupt or have no user context, we must not take
* the fault.
@@ -446,7 +442,7 @@ static int do_bad(unsigned long addr, unsigned int esr, struct pt_regs *regs)
return 1;
}
-static struct fault_info {
+static const struct fault_info {
int (*fn)(unsigned long addr, unsigned int esr, struct pt_regs *regs);
int sig;
int code;
@@ -606,20 +602,33 @@ asmlinkage int __exception do_debug_exception(unsigned long addr,
{
const struct fault_info *inf = debug_fault_info + DBG_ESR_EVT(esr);
struct siginfo info;
+ int rv;
- if (!inf->fn(addr, esr, regs))
- return 1;
+ /*
+ * Tell lockdep we disabled irqs in entry.S. Do nothing if they were
+ * already disabled to preserve the last enabled/disabled addresses.
+ */
+ if (interrupts_enabled(regs))
+ trace_hardirqs_off();
- pr_alert("Unhandled debug exception: %s (0x%08x) at 0x%016lx\n",
- inf->name, esr, addr);
+ if (!inf->fn(addr, esr, regs)) {
+ rv = 1;
+ } else {
+ pr_alert("Unhandled debug exception: %s (0x%08x) at 0x%016lx\n",
+ inf->name, esr, addr);
+
+ info.si_signo = inf->sig;
+ info.si_errno = 0;
+ info.si_code = inf->code;
+ info.si_addr = (void __user *)addr;
+ arm64_notify_die("", regs, &info, 0);
+ rv = 0;
+ }
- info.si_signo = inf->sig;
- info.si_errno = 0;
- info.si_code = inf->code;
- info.si_addr = (void __user *)addr;
- arm64_notify_die("", regs, &info, 0);
+ if (interrupts_enabled(regs))
+ trace_hardirqs_on();
- return 0;
+ return rv;
}
#ifdef CONFIG_ARM64_PAN