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kasan: reuse kasan_track in kasan_stack_ring_entry

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Avoid duplicating fields of kasan_track in kasan_stack_ring_entry: reuse
the structure.

Link: https://lkml.kernel.org/r/20231221183540.168428-2-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 19:35:38 +01:00 committed by Andrew Morton
parent f6940e8adc
commit 04afc540e5
3 changed files with 13 additions and 18 deletions
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7
mm/kasan/kasan.h
View File

@ -293,13 +293,8 @@ struct kasan_free_meta {
struct kasan_stack_ring_entry {
void *ptr;
size_t size;
u32 pid;
depot_stack_handle_t stack;
struct kasan_track track;
bool is_free;
#ifdef CONFIG_KASAN_EXTRA_INFO
u64 cpu:20;
u64 timestamp:44;
#endif /* CONFIG_KASAN_EXTRA_INFO */
};
struct kasan_stack_ring {

12
mm/kasan/report_tags.c
View File

@ -31,8 +31,8 @@ static const char *get_common_bug_type(struct kasan_report_info *info)
static void kasan_complete_extra_report_info(struct kasan_track *track,
struct kasan_stack_ring_entry *entry)
{
track->cpu = entry->cpu;
track->timestamp = entry->timestamp;
track->cpu = entry->track.cpu;
track->timestamp = entry->track.timestamp;
}
#endif /* CONFIG_KASAN_EXTRA_INFO */
@ -80,8 +80,8 @@ void kasan_complete_mode_report_info(struct kasan_report_info *info)
if (free_found)
break;
info->free_track.pid = entry->pid;
info->free_track.stack = entry->stack;
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 */
@ -98,8 +98,8 @@ void kasan_complete_mode_report_info(struct kasan_report_info *info)
if (alloc_found)
break;
info->alloc_track.pid = entry->pid;
info->alloc_track.stack = entry->stack;
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 */

12
mm/kasan/tags.c
View File

@ -100,8 +100,8 @@ static void save_extra_info(struct kasan_stack_ring_entry *entry)
u32 cpu = raw_smp_processor_id();
u64 ts_nsec = local_clock();
entry->cpu = cpu;
entry->timestamp = ts_nsec >> 3;
entry->track.cpu = cpu;
entry->track.timestamp = ts_nsec >> 3;
}
#endif /* CONFIG_KASAN_EXTRA_INFO */
@ -134,15 +134,15 @@ next:
if (!try_cmpxchg(&entry->ptr, &old_ptr, STACK_RING_BUSY_PTR))
goto next; /* Busy slot. */
old_stack = entry->stack;
old_stack = entry->track.stack;
entry->size = cache->object_size;
entry->pid = current->pid;
entry->stack = stack;
entry->is_free = is_free;
entry->track.pid = current->pid;
entry->track.stack = stack;
#ifdef CONFIG_KASAN_EXTRA_INFO
save_extra_info(entry);
#endif /* CONFIG_KASAN_EXTRA_INFO */
entry->is_free = is_free;
entry->ptr = object;