[patch 31/78] kasan: rename addr_has_shadow to addr_has_metadata

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From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: rename addr_has_shadow to addr_has_metadata

This is a preparatory commit for the upcoming addition of a new hardware
tag-based (MTE-based) KASAN mode.

Hardware tag-based KASAN won't be using shadow memory, but will reuse this
function.  Rename "shadow" to implementation-neutral "metadata".

No functional changes.

Link: https://lkml.kernel.org/r/370466fba590a4596b55ffd38adfd990f8886db4.1606161801.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx>
Tested-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Branislav Rankov <Branislav.Rankov@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Evgenii Stepanov <eugenis@xxxxxxxxxx>
Cc: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/kasan/kasan.h          |    2 +-
 mm/kasan/report.c         |    6 +++---
 mm/kasan/report_generic.c |    2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

--- a/mm/kasan/kasan.h~kasan-rename-addr_has_shadow-to-addr_has_metadata
+++ a/mm/kasan/kasan.h
@@ -147,7 +147,7 @@ static inline const void *kasan_shadow_t
 		<< KASAN_SHADOW_SCALE_SHIFT);
 }
 
-static inline bool addr_has_shadow(const void *addr)
+static inline bool addr_has_metadata(const void *addr)
 {
 	return (addr >= kasan_shadow_to_mem((void *)KASAN_SHADOW_START));
 }
--- a/mm/kasan/report.c~kasan-rename-addr_has_shadow-to-addr_has_metadata
+++ a/mm/kasan/report.c
@@ -361,7 +361,7 @@ static void __kasan_report(unsigned long
 	untagged_addr = reset_tag(tagged_addr);
 
 	info.access_addr = tagged_addr;
-	if (addr_has_shadow(untagged_addr))
+	if (addr_has_metadata(untagged_addr))
 		info.first_bad_addr = find_first_bad_addr(tagged_addr, size);
 	else
 		info.first_bad_addr = untagged_addr;
@@ -372,11 +372,11 @@ static void __kasan_report(unsigned long
 	start_report(&flags);
 
 	print_error_description(&info);
-	if (addr_has_shadow(untagged_addr))
+	if (addr_has_metadata(untagged_addr))
 		print_tags(get_tag(tagged_addr), info.first_bad_addr);
 	pr_err("\n");
 
-	if (addr_has_shadow(untagged_addr)) {
+	if (addr_has_metadata(untagged_addr)) {
 		print_address_description(untagged_addr, get_tag(tagged_addr));
 		pr_err("\n");
 		print_shadow_for_address(info.first_bad_addr);
--- a/mm/kasan/report_generic.c~kasan-rename-addr_has_shadow-to-addr_has_metadata
+++ a/mm/kasan/report_generic.c
@@ -118,7 +118,7 @@ const char *get_bug_type(struct kasan_ac
 	if (info->access_addr + info->access_size < info->access_addr)
 		return "out-of-bounds";
 
-	if (addr_has_shadow(info->access_addr))
+	if (addr_has_metadata(info->access_addr))
 		return get_shadow_bug_type(info);
 	return get_wild_bug_type(info);
 }
_




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