+ kasan-simplify-kasan_update_kunit_status-and-call-sites.patch added to -mm tree

+ kasan-simplify-kasan_update_kunit_status-and-call-sites.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: kasan: simplify kasan_update_kunit_status() and call sites
has been added to the -mm tree.  Its filename is
     kasan-simplify-kasan_update_kunit_status-and-call-sites.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/kasan-simplify-kasan_update_kunit_status-and-call-sites.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/kasan-simplify-kasan_update_kunit_status-and-call-sites.patch

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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there every 3-4 working days

------------------------------------------------------
From: Andrey Konovalov <andreyknvl@google.com>
Subject: kasan: simplify kasan_update_kunit_status() and call sites

- Rename kasan_update_kunit_status() to update_kunit_status()
  (the function is static).

- Move the IS_ENABLED(CONFIG_KUNIT) to the function's
  definition instead of duplicating it at call sites.

- Obtain and check current->kunit_test within the function.

Link: https://lkml.kernel.org/r/dac26d811ae31856c3d7666de0b108a3735d962d.1646237226.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kasan/report.c |   30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

--- a/mm/kasan/report.c~kasan-simplify-kasan_update_kunit_status-and-call-sites
+++ a/mm/kasan/report.c
@@ -357,24 +357,31 @@ static bool report_enabled(void)
 }
 
 #if IS_ENABLED(CONFIG_KUNIT)
-static void kasan_update_kunit_status(struct kunit *cur_test, bool sync)
+static void update_kunit_status(bool sync)
 {
+	struct kunit *test;
 	struct kunit_resource *resource;
 	struct kunit_kasan_status *status;
 
-	resource = kunit_find_named_resource(cur_test, "kasan_status");
+	test = current->kunit_test;
+	if (!test)
+		return;
 
+	resource = kunit_find_named_resource(test, "kasan_status");
 	if (!resource) {
-		kunit_set_failure(cur_test);
+		kunit_set_failure(test);
 		return;
 	}
 
 	status = (struct kunit_kasan_status *)resource->data;
 	WRITE_ONCE(status->report_found, true);
 	WRITE_ONCE(status->sync_fault, sync);
+
 	kunit_put_resource(resource);
 }
-#endif /* IS_ENABLED(CONFIG_KUNIT) */
+#else
+static void update_kunit_status(bool sync) { }
+#endif
 
 void kasan_report_invalid_free(void *object, unsigned long ip)
 {
@@ -383,10 +390,7 @@ void kasan_report_invalid_free(void *obj
 
 	object = kasan_reset_tag(object);
 
-#if IS_ENABLED(CONFIG_KUNIT)
-	if (current->kunit_test)
-		kasan_update_kunit_status(current->kunit_test, true);
-#endif /* IS_ENABLED(CONFIG_KUNIT) */
+	update_kunit_status(true);
 
 	start_report(&flags);
 	pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", (void *)ip);
@@ -402,10 +406,7 @@ void kasan_report_async(void)
 {
 	unsigned long flags;
 
-#if IS_ENABLED(CONFIG_KUNIT)
-	if (current->kunit_test)
-		kasan_update_kunit_status(current->kunit_test, false);
-#endif /* IS_ENABLED(CONFIG_KUNIT) */
+	update_kunit_status(false);
 
 	start_report(&flags);
 	pr_err("BUG: KASAN: invalid-access\n");
@@ -424,10 +425,7 @@ static void __kasan_report(unsigned long
 	void *untagged_addr;
 	unsigned long flags;
 
-#if IS_ENABLED(CONFIG_KUNIT)
-	if (current->kunit_test)
-		kasan_update_kunit_status(current->kunit_test, true);
-#endif /* IS_ENABLED(CONFIG_KUNIT) */
+	update_kunit_status(true);
 
 	disable_trace_on_warning();
 
_

Patches currently in -mm which might be from andreyknvl@google.com are

kasan-page_alloc-deduplicate-should_skip_kasan_poison.patch
kasan-page_alloc-move-tag_clear_highpage-out-of-kernel_init_free_pages.patch
kasan-page_alloc-merge-kasan_free_pages-into-free_pages_prepare.patch
kasan-page_alloc-simplify-kasan_poison_pages-call-site.patch
kasan-page_alloc-init-memory-of-skipped-pages-on-free.patch
kasan-drop-skip_kasan_poison-variable-in-free_pages_prepare.patch
mm-clarify-__gfp_zerotags-comment.patch
kasan-only-apply-__gfp_zerotags-when-memory-is-zeroed.patch
kasan-page_alloc-refactor-init-checks-in-post_alloc_hook.patch
kasan-page_alloc-merge-kasan_alloc_pages-into-post_alloc_hook.patch
kasan-page_alloc-combine-tag_clear_highpage-calls-in-post_alloc_hook.patch
kasan-page_alloc-move-setpageskipkasanpoison-in-post_alloc_hook.patch
kasan-page_alloc-move-kernel_init_free_pages-in-post_alloc_hook.patch
kasan-page_alloc-rework-kasan_unpoison_pages-call-site.patch
kasan-clean-up-metadata-byte-definitions.patch
kasan-define-kasan_vmalloc_invalid-for-sw_tags.patch
kasan-x86-arm64-s390-rename-functions-for-modules-shadow.patch
kasan-vmalloc-drop-outdated-vm_kasan-comment.patch
kasan-reorder-vmalloc-hooks.patch
kasan-add-wrappers-for-vmalloc-hooks.patch
kasan-vmalloc-reset-tags-in-vmalloc-functions.patch
kasan-fork-reset-pointer-tags-of-vmapped-stacks.patch
kasan-arm64-reset-pointer-tags-of-vmapped-stacks.patch
kasan-fork-reset-pointer-tags-of-vmapped-stacks-fix.patch
kasan-vmalloc-add-vmalloc-tagging-for-sw_tags.patch
kasan-vmalloc-arm64-mark-vmalloc-mappings-as-pgprot_tagged.patch
kasan-vmalloc-unpoison-vm_alloc-pages-after-mapping.patch
kasan-mm-only-define-___gfp_skip_kasan_poison-with-hw_tags.patch
kasan-page_alloc-allow-skipping-unpoisoning-for-hw_tags.patch
kasan-page_alloc-allow-skipping-memory-init-for-hw_tags.patch
kasan-vmalloc-add-vmalloc-tagging-for-hw_tags.patch
kasan-vmalloc-only-tag-normal-vmalloc-allocations.patch
kasan-arm64-dont-tag-executable-vmalloc-allocations.patch
kasan-mark-kasan_arg_stacktrace-as-__initdata.patch
kasan-clean-up-feature-flags-for-hw_tags-mode.patch
kasan-add-kasanvmalloc-command-line-flag.patch
kasan-allow-enabling-kasan_vmalloc-and-sw-hw_tags.patch
arm64-select-kasan_vmalloc-for-sw-hw_tags-modes.patch
kasan-documentation-updates.patch
kasan-improve-vmalloc-tests.patch
kasan-improve-vmalloc-tests-fix-2.patch
kasan-improve-vmalloc-tests-fix-3.patch
kasan-test-support-async-again-and-asymm-modes-for-hw_tags.patch
kasan-print-virtual-mapping-info-in-reports.patch
kasan-drop-addr-check-from-describe_object_addr.patch
kasan-more-line-breaks-in-reports.patch
kasan-rearrange-stack-frame-info-in-reports.patch
kasan-improve-stack-frame-info-in-reports.patch
kasan-print-basic-stack-frame-info-for-sw_tags.patch
kasan-simplify-async-check-in-end_report.patch
kasan-simplify-kasan_update_kunit_status-and-call-sites.patch
kasan-check-config_kasan_kunit_test-instead-of-config_kunit.patch
kasan-move-update_kunit_status-to-start_report.patch
kasan-move-disable_trace_on_warning-to-start_report.patch
kasan-split-out-print_report-from-__kasan_report.patch
kasan-simplify-kasan_find_first_bad_addr-call-sites.patch
kasan-restructure-kasan_report.patch
kasan-merge-__kasan_report-into-kasan_report.patch
kasan-call-print_report-from-kasan_report_invalid_free.patch
kasan-move-and-simplify-kasan_report_async.patch
kasan-rename-kasan_access_info-to-kasan_report_info.patch
kasan-add-comment-about-uaccess-regions-to-kasan_report.patch
kasan-respect-kasan_bit_reported-in-all-reporting-routines.patch
kasan-reorder-reporting-functions.patch
kasan-move-and-hide-kasan_save_enable-restore_multi_shot.patch
kasan-disable-lockdep-when-printing-reports.patch