zram: use __bio_add_page for adding single page to bio

[linux-block.git] / lib / stackdepot.c

diff --git a/lib/stackdepot.c b/lib/stackdepot.c
index 036da8e295d1937f9ef7af9e396f769484fa1cd8..2f5aa851834ebb36c79274a2c6183c6cea45747b 100644 (file)
--- a/lib/stackdepot.c
+++ b/lib/stackdepot.c
@@ -17,6 +17,7 @@
 #include <linux/gfp.h>
 #include <linux/jhash.h>
 #include <linux/kernel.h>
+#include <linux/kmsan.h>
 #include <linux/mm.h>
 #include <linux/mutex.h>
 #include <linux/percpu.h>
@@ -306,6 +307,11 @@ depot_alloc_stack(unsigned long *entries, int size, u32 hash, void **prealloc)
        stack->handle.extra = 0;
        memcpy(stack->entries, entries, flex_array_size(stack, entries, size));
        pool_offset += required_size;
+       /*
+        * Let KMSAN know the stored stack record is initialized. This shall
+        * prevent false positive reports if instrumented code accesses it.
+        */
+       kmsan_unpoison_memory(stack, required_size);
 
        return stack;
 }
@@ -465,6 +471,12 @@ unsigned int stack_depot_fetch(depot_stack_handle_t handle,
        struct stack_record *stack;
 
        *entries = NULL;
+       /*
+        * Let KMSAN know *entries is initialized. This shall prevent false
+        * positive reports if instrumented code accesses it.
+        */
+       kmsan_unpoison_memory(entries, sizeof(*entries));
+
        if (!handle)
                return 0;