1 files changed, 14 insertions, 14 deletions

diff --git a/arch/x86_64/kernel/kprobes.c b/arch/x86_64/kernel/kprobes.c
index 76a28b007be9..ebfa2c9241ca 100644
--- a/arch/x86_64/kernel/kprobes.c
+++ b/arch/x86_64/kernel/kprobes.c
@@ -302,9 +302,6 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
         int ret = 0;
         kprobe_opcode_t *addr = (kprobe_opcode_t *)(regs->rip - sizeof(kprobe_opcode_t));
 
-        /* We're in an interrupt, but this is clear and BUG()-safe. */
-        preempt_disable();
-
         /* Check we're not actually recursing */
         if (kprobe_running()) {
                 /* We *are* holding lock here, so this is safe.
@@ -372,6 +369,11 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
                 goto no_kprobe;
         }
 
+        /*
+         * This preempt_disable() matches the preempt_enable_no_resched()
+         * in post_kprobe_handler()
+         */
+        preempt_disable();
         kprobe_status = KPROBE_HIT_ACTIVE;
         set_current_kprobe(p, regs);
 
@@ -385,7 +387,6 @@ ss_probe:
         return 1;
 
 no_kprobe:
-        preempt_enable_no_resched();
         return ret;
 }
 
@@ -456,7 +457,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
         /*
          * By returning a non-zero value, we are telling
          * kprobe_handler() that we have handled unlocking
-         * and re-enabling preemption.
+         * and re-enabling preemption
          */
         return 1;
 }
@@ -599,29 +600,29 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
                                        unsigned long val, void *data)
 {
         struct die_args *args = (struct die_args *)data;
+        int ret = NOTIFY_DONE;
+
+        preempt_disable();
         switch (val) {
         case DIE_INT3:
                 if (kprobe_handler(args->regs))
-                        return NOTIFY_STOP;
+                        ret = NOTIFY_STOP;
                 break;
         case DIE_DEBUG:
                 if (post_kprobe_handler(args->regs))
-                        return NOTIFY_STOP;
+                        ret = NOTIFY_STOP;
                 break;
         case DIE_GPF:
-                if (kprobe_running() &&
-                    kprobe_fault_handler(args->regs, args->trapnr))
-                        return NOTIFY_STOP;
-                break;
         case DIE_PAGE_FAULT:
                 if (kprobe_running() &&
                     kprobe_fault_handler(args->regs, args->trapnr))
-                        return NOTIFY_STOP;
+                        ret = NOTIFY_STOP;
                 break;
         default:
                 break;
         }
-        return NOTIFY_DONE;
+        preempt_enable();
+        return ret;
 }
 
 int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
@@ -647,7 +648,6 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
 
 void __kprobes jprobe_return(void)
 {
-        preempt_enable_no_resched();
         asm volatile ("       xchg   %%rbx,%%rsp     \n"
                       "       int3                      \n"
                       "       .globl jprobe_return_end  \n"