diff options
| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2019-08-14 18:55:35 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2019-09-25 10:16:39 -0400 |
| commit | 3fc4a64cbaed2ddee4c60ddc06740b320e18ab82 (patch) | |
| tree | 16e5afcfcd995a237bf8950b4367c9a4457e5e4e /hw | |
| parent | 9366cf02e4e31c2a8128904d4d8290a0fad5f888 (diff) | |
vhost: Fix memory region section comparison
Using memcmp to compare structures wasn't safe,
as I found out on ARM when I was getting falce miscompares.
Use the helper function for comparing the MRSs.
Fixes: ade6d081fc33948e56e6 ("vhost: Regenerate region list from changed sections list")
Cc: qemu-stable@nongnu.org
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20190814175535.2023-4-dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/virtio/vhost.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 34accdf615..2386b511f3 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -451,8 +451,13 @@ static void vhost_commit(MemoryListener *listener) changed = true; } else { /* Same size, lets check the contents */ - changed = n_old_sections && memcmp(dev->mem_sections, old_sections, - n_old_sections * sizeof(old_sections[0])) != 0; + for (int i = 0; i < n_old_sections; i++) { + if (!MemoryRegionSection_eq(&old_sections[i], + &dev->mem_sections[i])) { + changed = true; + break; + } + } } trace_vhost_commit(dev->started, changed); |