From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Cc: Gerd Hoffmann <kraxel@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>
Subject: [Qemu-devel] [PATCH] virtio-gpu: fix unmap in error path
Date: Fri, 28 Jun 2019 09:23:57 +0200 [thread overview]
Message-ID: <20190628072357.31782-1-kraxel@redhat.com> (raw)
We land here in case not everything we've asked for could be mapped.
So unmap only the bytes which have actually been mapped.
Also we didn't access anything, so acces_len can be 0.
Reported-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
hw/display/virtio-gpu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 2b0f66b1d68d..475a018c027c 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -1048,9 +1048,9 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
if (res->iov[i].iov_base) {
dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
res->iov[i].iov_base,
- res->iov[i].iov_len,
+ len,
DMA_DIRECTION_TO_DEVICE,
- res->iov[i].iov_len);
+ 0);
}
/* ...and the mappings for previous loop iterations */
res->iov_cnt = i;
--
2.18.1
next reply other threads:[~2019-06-28 7:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-28 7:23 Gerd Hoffmann [this message]
2019-06-28 14:08 ` [Qemu-devel] [PATCH] virtio-gpu: fix unmap in error path Laszlo Ersek
2019-06-28 15:31 ` Li Qiang
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