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Code Issues Releases Wiki Activity

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: 5d4c6ac946 ("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>
This commit is contained in:
Andrey Konovalov 2023-12-21 19:35:40 +01:00 committed by Andrew Morton
parent fd4064f697
commit a3fbe303ec
1 changed files with 4 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
mm/kasan/report_tags.c
View File

@ -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;
/*