From a3fbe303ec9db45dbabc923ea9c5323900176079 Mon Sep 17 00:00:00 2001 From: Andrey Konovalov Date: Thu, 21 Dec 2023 19:35:40 +0100 Subject: [PATCH] kasan: simplify kasan_complete_mode_report_info for tag-based modes 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 Reviewed-by: Marco Elver Cc: Alexander Potapenko Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Juntong Deng Signed-off-by: Andrew Morton --- mm/kasan/report_tags.c | 23 ++++------------------- 1 file changed, 4 insertions(+), 19 deletions(-) diff --git a/mm/kasan/report_tags.c b/mm/kasan/report_tags.c index 688b9d70b04ae5..d15f8f580e2c5f 100644 --- a/mm/kasan/report_tags.c +++ b/mm/kasan/report_tags.c @@ -27,15 +27,6 @@ static const char *get_common_bug_type(struct kasan_report_info *info) 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(struct kasan_report_info *info) 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(struct kasan_report_info *info) 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; /*