[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v2 01/20] parallels: Set s->used_bmap to NULL in parallels_free_u
From: |
Alexander Ivanov |
Subject: |
[PATCH v2 01/20] parallels: Set s->used_bmap to NULL in parallels_free_used_bitmap() |
Date: |
Thu, 19 Oct 2023 14:58:35 +0200 |
After used bitmap freeng s->used_bmap points to the freed memory. If we try
to free used bitmap one more time it leads to double free error.
Set s->used_bmap to NULL to exclude double free error.
Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
---
block/parallels.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block/parallels.c b/block/parallels.c
index 6b46623241..ba1fdde259 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -244,6 +244,7 @@ static void parallels_free_used_bitmap(BlockDriverState *bs)
{
BDRVParallelsState *s = bs->opaque;
s->used_bmap_size = 0;
+ s->used_bmap = NULL;
g_free(s->used_bmap);
}
--
2.34.1
- [PATCH v2 00/20] parallels: Add full dirty bitmap support, Alexander Ivanov, 2023/10/19
- [PATCH v2 02/20] parallels: Move inactivation code to a separate function, Alexander Ivanov, 2023/10/19
- [PATCH v2 01/20] parallels: Set s->used_bmap to NULL in parallels_free_used_bitmap(),
Alexander Ivanov <=
- [PATCH v2 03/20] parallels: Add mark_unused() helper, Alexander Ivanov, 2023/10/19
- [PATCH v2 04/20] parallels: Move host clusters allocation to a separate function, Alexander Ivanov, 2023/10/19
- [PATCH v2 06/20] parallels: Recreate used bitmap in parallels_check_leak(), Alexander Ivanov, 2023/10/19
- [PATCH v2 08/20] parallels: Create used bitmap even if checks needed, Alexander Ivanov, 2023/10/19
- [PATCH v2 10/20] parallels: Add dirty bitmaps saving, Alexander Ivanov, 2023/10/19
- [PATCH v2 05/20] parallels: Set data_end value in parallels_check_leak(), Alexander Ivanov, 2023/10/19