+ kasan-simplify-kasan_complete_mode_report_info-for-tag-based-modes.patch added to mm-unstable branch

+ kasan-simplify-kasan_complete_mode_report_info-for-tag-based-modes.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: kasan: simplify kasan_complete_mode_report_info for tag-based modes
has been added to the -mm mm-unstable branch.  Its filename is
     kasan-simplify-kasan_complete_mode_report_info-for-tag-based-modes.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-simplify-kasan_complete_mode_report_info-for-tag-based-modes.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrey Konovalov <andreyknvl@google.com>
Subject: kasan: simplify kasan_complete_mode_report_info for tag-based modes
Date: Thu, 21 Dec 2023 19:35:40 +0100

memcpy the alloc/free tracks when collecting the information about a bad
access instead of copying fields one by one.

Link: https://lkml.kernel.org/r/20231221183540.168428-4-andrey.konovalov@linux.dev
Fixes: 5d4c6ac94694 ("kasan: record and report more information")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Juntong Deng <juntong.deng@outlook.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kasan/report_tags.c |   23 ++++-------------------
 1 file changed, 4 insertions(+), 19 deletions(-)

--- a/mm/kasan/report_tags.c~kasan-simplify-kasan_complete_mode_report_info-for-tag-based-modes
+++ a/mm/kasan/report_tags.c
@@ -27,15 +27,6 @@ static const char *get_common_bug_type(s
 	return "invalid-access";
 }
 
-#ifdef CONFIG_KASAN_EXTRA_INFO
-static void kasan_complete_extra_report_info(struct kasan_track *track,
-					 struct kasan_stack_ring_entry *entry)
-{
-	track->cpu = entry->track.cpu;
-	track->timestamp = entry->track.timestamp;
-}
-#endif /* CONFIG_KASAN_EXTRA_INFO */
-
 void kasan_complete_mode_report_info(struct kasan_report_info *info)
 {
 	unsigned long flags;
@@ -80,11 +71,8 @@ void kasan_complete_mode_report_info(str
 			if (free_found)
 				break;
 
-			info->free_track.pid = entry->track.pid;
-			info->free_track.stack = entry->track.stack;
-#ifdef CONFIG_KASAN_EXTRA_INFO
-			kasan_complete_extra_report_info(&info->free_track, entry);
-#endif /* CONFIG_KASAN_EXTRA_INFO */
+			memcpy(&info->free_track, &entry->track,
+			       sizeof(info->free_track));
 			free_found = true;
 
 			/*
@@ -98,11 +86,8 @@ void kasan_complete_mode_report_info(str
 			if (alloc_found)
 				break;
 
-			info->alloc_track.pid = entry->track.pid;
-			info->alloc_track.stack = entry->track.stack;
-#ifdef CONFIG_KASAN_EXTRA_INFO
-			kasan_complete_extra_report_info(&info->alloc_track, entry);
-#endif /* CONFIG_KASAN_EXTRA_INFO */
+			memcpy(&info->alloc_track, &entry->track,
+			       sizeof(info->alloc_track));
 			alloc_found = true;
 
 			/*
_

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

kasan-rename-kasan_slab_free_mempool-to-kasan_mempool_poison_object.patch
kasan-move-kasan_mempool_poison_object.patch
kasan-document-kasan_mempool_poison_object.patch
kasan-add-return-value-for-kasan_mempool_poison_object.patch
kasan-introduce-kasan_mempool_unpoison_object.patch
kasan-introduce-kasan_mempool_poison_pages.patch
kasan-introduce-kasan_mempool_unpoison_pages.patch
kasan-clean-up-__kasan_mempool_poison_object.patch
kasan-save-free-stack-traces-for-slab-mempools.patch
kasan-clean-up-and-rename-____kasan_kmalloc.patch
kasan-introduce-poison_kmalloc_large_redzone.patch
kasan-save-alloc-stack-traces-for-mempool.patch
mempool-skip-slub_debug-poisoning-when-kasan-is-enabled.patch
mempool-use-new-mempool-kasan-hooks.patch
mempool-introduce-mempool_use_prealloc_only.patch
kasan-add-mempool-tests.patch
kasan-rename-pagealloc-tests.patch
kasan-reorder-tests.patch
kasan-rename-and-document-kasan_unpoison_object_data.patch
skbuff-use-mempool-kasan-hooks.patch
io_uring-use-mempool-kasan-hook.patch
lib-stackdepot-add-printk_deferred_enter-exit-guards.patch
kasan-handle-concurrent-kasan_record_aux_stack-calls.patch
kasan-memset-free-track-in-qlink_free.patch
lib-stackdepot-fix-comment-in-include-linux-stackdepoth.patch
kasan-arm64-improve-comments-for-kasan_shadow_start-end.patch
mm-kasan-use-kasan_tag_kernel-instead-of-0xff.patch
kasan-improve-kasan_non_canonical_hook.patch
kasan-clean-up-kasan_requires_meta.patch
kasan-update-kasan_poison-documentation-comment.patch
kasan-clean-up-is_kfence_address-checks.patch
kasan-respect-config_kasan_vmalloc-for-kasan_flag_vmalloc.patch
kasan-check-kasan_vmalloc_enabled-in-vmalloc-tests.patch
kasan-export-kasan_poison-as-gpl.patch
kasan-remove-slub-checks-for-page_alloc-fallbacks-in-tests.patch
kasan-speed-up-match_all_mem_tag-test-for-sw_tags.patch
kasan-clean-up-kasan_cache_create.patch
kasan-reuse-kasan_track-in-kasan_stack_ring_entry.patch
kasan-simplify-saving-extra-info-into-tracks.patch
kasan-simplify-kasan_complete_mode_report_info-for-tag-based-modes.patch