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[PATCH 5/5] block/nvme: Fix memory leak from nvme_init_queue()
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH 5/5] block/nvme: Fix memory leak from nvme_init_queue() |
Date: |
Wed, 6 Oct 2021 18:49:31 +0200 |
nvme_create_queue_pair() allocates resources with qemu_vfio_dma_map(),
but we never release them. Do it in nvme_free_queue() which is called
from nvme_free_queue_pair().
Reported by valgrind:
==252858== 520,192 bytes in 1 blocks are still reachable in loss record 8,293
of 8,302
==252858== at 0x4846803: memalign (vg_replace_malloc.c:1265)
==252858== by 0x484691F: posix_memalign (vg_replace_malloc.c:1429)
==252858== by 0xB8AFE4: qemu_try_memalign (oslib-posix.c:210)
==252858== by 0xA9E315: nvme_create_queue_pair (nvme.c:229)
==252858== by 0xAA0125: nvme_init (nvme.c:799)
==252858== by 0xAA081C: nvme_file_open (nvme.c:953)
==252858== by 0xA23DDD: bdrv_open_driver (block.c:1550)
==252858== by 0xA24806: bdrv_open_common (block.c:1827)
==252858== by 0xA2889B: bdrv_open_inherit (block.c:3747)
==252858== by 0xA28DE4: bdrv_open (block.c:3840)
==252858== by 0x9E0F8E: bds_tree_init (blockdev.c:675)
==252858== by 0x9E7C74: qmp_blockdev_add (blockdev.c:3551)
Fixes: bdd6a90a9e5 ("block: Add VFIO based NVMe driver")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
block/nvme.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block/nvme.c b/block/nvme.c
index 6e476f54b9f..903c8ffa060 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -185,6 +185,7 @@ static bool nvme_init_queue(BDRVNVMeState *s, NVMeQueue *q,
static void nvme_free_queue(BDRVNVMeState *s, NVMeQueue *q)
{
+ qemu_vfio_dma_unmap(s->vfio, q->queue);
qemu_vfree(q->queue);
}
--
2.31.1