1 files changed, 18 insertions, 6 deletions

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 06f58309fed2..c90e417bb963 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -127,7 +127,7 @@ static void *alloc_insn_page(void)
 
 static void free_insn_page(void *page)
 {
-        module_free(NULL, page);
+        module_memfree(page);
 }
 
 struct kprobe_insn_cache kprobe_insn_slots = {
@@ -717,7 +717,7 @@ static void prepare_optimized_kprobe(struct kprobe *p)
         struct optimized_kprobe *op;
 
         op = container_of(p, struct optimized_kprobe, kp);
-        arch_prepare_optimized_kprobe(op);
+        arch_prepare_optimized_kprobe(op, p);
 }
 
 /* Allocate new optimized_kprobe and try to prepare optimized instructions */
@@ -731,7 +731,7 @@ static struct kprobe *alloc_aggr_kprobe(struct kprobe *p)
 
         INIT_LIST_HEAD(&op->list);
         op->kp.addr = p->addr;
-        arch_prepare_optimized_kprobe(op);
+        arch_prepare_optimized_kprobe(op, p);
 
         return &op->kp;
 }
@@ -869,7 +869,8 @@ static void __disarm_kprobe(struct kprobe *p, bool reopt)
 {
         struct kprobe *_p;
 
-        unoptimize_kprobe(p, false);    /* Try to unoptimize */
+        /* Try to unoptimize */
+        unoptimize_kprobe(p, kprobes_all_disarmed);
 
         if (!kprobe_queued(p)) {
                 arch_disarm_kprobe(p);
@@ -1571,7 +1572,13 @@ static struct kprobe *__disable_kprobe(struct kprobe *p)
 
                 /* Try to disarm and disable this/parent probe */
                 if (p == orig_p || aggr_kprobe_disabled(orig_p)) {
-                        disarm_kprobe(orig_p, true);
+                        /*
+                         * If kprobes_all_disarmed is set, orig_p
+                         * should have already been disarmed, so
+                         * skip unneed disarming process.
+                         */
+                        if (!kprobes_all_disarmed)
+                                disarm_kprobe(orig_p, true);
                         orig_p->flags |= KPROBE_FLAG_DISABLED;
                 }
         }
@@ -2320,6 +2327,12 @@ static void arm_all_kprobes(void)
         if (!kprobes_all_disarmed)
                 goto already_enabled;
 
+        /*
+         * optimize_kprobe() called by arm_kprobe() checks
+         * kprobes_all_disarmed, so set kprobes_all_disarmed before
+         * arm_kprobe.
+         */
+        kprobes_all_disarmed = false;
         /* Arming kprobes doesn't optimize kprobe itself */
         for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
                 head = &kprobe_table[i];
@@ -2328,7 +2341,6 @@ static void arm_all_kprobes(void)
                                 arm_kprobe(p);
         }
 
-        kprobes_all_disarmed = false;
         printk(KERN_INFO "Kprobes globally enabled\n");
 
 already_enabled: