1 files changed, 30 insertions, 49 deletions

diff --git a/mm/slub.c b/mm/slub.c
index e1644ac6ee7b..090fa14628f9 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -26,7 +26,6 @@
 #include <linux/cpuset.h>
 #include <linux/mempolicy.h>
 #include <linux/ctype.h>
-#include <linux/stackdepot.h>
 #include <linux/debugobjects.h>
 #include <linux/kallsyms.h>
 #include <linux/kfence.h>
@@ -207,8 +206,8 @@ static inline bool kmem_cache_has_cpu_partial(struct kmem_cache *s)
 #define TRACK_ADDRS_COUNT 16
 struct track {
 	unsigned long addr;	/* Called from address */
-#ifdef CONFIG_STACKDEPOT
-	depot_stack_handle_t handle;
+#ifdef CONFIG_STACKTRACE
+	unsigned long addrs[TRACK_ADDRS_COUNT];	/* Called from address */
 #endif
 	int cpu;		/* Was running on cpu */
 	int pid;		/* Pid context */
@@ -612,27 +611,22 @@ static struct track *get_track(struct kmem_cache *s, void *object,
 	return kasan_reset_tag(p + alloc);
 }
 
-#ifdef CONFIG_STACKDEPOT
-static depot_stack_handle_t save_stack_depot_trace(gfp_t flags)
-{
-	unsigned long entries[TRACK_ADDRS_COUNT];
-	depot_stack_handle_t handle;
-	unsigned int nr_entries;
-
-	nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 4);
-	handle = stack_depot_save(entries, nr_entries, flags);
-	return handle;
-}
-#endif
-
 static void set_track(struct kmem_cache *s, void *object,
 			enum track_item alloc, unsigned long addr)
 {
 	struct track *p = get_track(s, object, alloc);
 
 	if (addr) {
-#ifdef CONFIG_STACKDEPOT
-		p->handle = save_stack_depot_trace(GFP_NOWAIT);
+#ifdef CONFIG_STACKTRACE
+		unsigned int nr_entries;
+
+		metadata_access_enable();
+		nr_entries = stack_trace_save(kasan_reset_tag(p->addrs),
+					      TRACK_ADDRS_COUNT, 3);
+		metadata_access_disable();
+
+		if (nr_entries < TRACK_ADDRS_COUNT)
+			p->addrs[nr_entries] = 0;
 #endif
 		p->addr = addr;
 		p->cpu = smp_processor_id();
@@ -659,19 +653,14 @@ static void print_track(const char *s, struct track *t, unsigned long pr_time)
 
 	pr_err("%s in %pS age=%lu cpu=%u pid=%d\n",
 	       s, (void *)t->addr, pr_time - t->when, t->cpu, t->pid);
-#ifdef CONFIG_STACKDEPOT
+#ifdef CONFIG_STACKTRACE
 	{
-		depot_stack_handle_t handle;
-		unsigned long *entries;
-		unsigned int nr_entries;
-
-		handle = READ_ONCE(t->handle);
-		if (!handle) {
-			pr_err("object allocation/free stack trace missing\n");
-		} else {
-			nr_entries = stack_depot_fetch(handle, &entries);
-			stack_trace_print(entries, nr_entries, 0);
-		}
+		int i;
+		for (i = 0; i < TRACK_ADDRS_COUNT; i++)
+			if (t->addrs[i])
+				pr_err("\t%pS\n", (void *)t->addrs[i]);
+			else
+				break;
 	}
 #endif
 }
@@ -4045,26 +4034,18 @@ void kmem_obj_info(struct kmem_obj_info *kpp, void *object, struct page *page)
 	objp = fixup_red_left(s, objp);
 	trackp = get_track(s, objp, TRACK_ALLOC);
 	kpp->kp_ret = (void *)trackp->addr;
-#ifdef CONFIG_STACKDEPOT
-	{
-		depot_stack_handle_t handle;
-		unsigned long *entries;
-		unsigned int nr_entries;
-
-		handle = READ_ONCE(trackp->handle);
-		if (handle) {
-			nr_entries = stack_depot_fetch(handle, &entries);
-			for (i = 0; i < KS_ADDRS_COUNT && i < nr_entries; i++)
-				kpp->kp_stack[i] = (void *)entries[i];
-		}
+#ifdef CONFIG_STACKTRACE
+	for (i = 0; i < KS_ADDRS_COUNT && i < TRACK_ADDRS_COUNT; i++) {
+		kpp->kp_stack[i] = (void *)trackp->addrs[i];
+		if (!kpp->kp_stack[i])
+			break;
+	}
 
-		trackp = get_track(s, objp, TRACK_FREE);
-		handle = READ_ONCE(trackp->handle);
-		if (handle) {
-			nr_entries = stack_depot_fetch(handle, &entries);
-			for (i = 0; i < KS_ADDRS_COUNT && i < nr_entries; i++)
-				kpp->kp_free_stack[i] = (void *)entries[i];
-		}
+	trackp = get_track(s, objp, TRACK_FREE);
+	for (i = 0; i < KS_ADDRS_COUNT && i < TRACK_ADDRS_COUNT; i++) {
+		kpp->kp_free_stack[i] = (void *)trackp->addrs[i];
+		if (!kpp->kp_free_stack[i])
+			break;
 	}
 #endif
 #endif