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VFIO updates 2022-09-27

Browse Source 
* Fix initial values for migration state (Kunkun Jiang)
 
  * Fix a use-after-free error path (Alex Williamson)
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Merge tag 'vfio-updates-20220927.1' of https://gitlab.com/alex.williamson/qemu into staging

VFIO updates 2022-09-27

 * Fix initial values for migration state (Kunkun Jiang)

 * Fix a use-after-free error path (Alex Williamson)

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# gpg: Signature made Tue 27 Sep 2022 16:27:24 EDT
# gpg:                using RSA key 42F6C04E540BD1A99E7B8A90239B9B6E3BB08B22
# gpg:                issuer "alex.williamson@redhat.com"
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex@shazbot.org>" [full]
# gpg:                 aka "Alex Williamson <alwillia@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex.l.williamson@gmail.com>" [full]
# Primary key fingerprint: 42F6 C04E 540B D1A9 9E7B  8A90 239B 9B6E 3BB0 8B22

* tag 'vfio-updates-20220927.1' of https://gitlab.com/alex.williamson/qemu:
  vfio/common: Fix vfio_iommu_type1_info use after free
  vfio/migration: Fix incorrect initialization value for parameters in VFIOMigration

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2022-09-28 17:03:40 -04:00
commit dc6c2342a0
2 changed files with 22 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
hw/vfio/common.c
View File

@ -2111,29 +2111,31 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as,
{
struct vfio_iommu_type1_info *info;
/*
* FIXME: This assumes that a Type1 IOMMU can map any 64-bit
* IOVA whatsoever. That's not actually true, but the current
* kernel interface doesn't tell us what it can map, and the
* existing Type1 IOMMUs generally support any IOVA we're
* going to actually try in practice.
*/
ret = vfio_get_iommu_info(container, &info);
if (ret || !(info->flags & VFIO_IOMMU_INFO_PGSIZES)) {
/* Assume 4k IOVA page size */
info->iova_pgsizes = 4096;
if (ret) {
error_setg_errno(errp, -ret, "Failed to get VFIO IOMMU info");
goto enable_discards_exit;
}
vfio_host_win_add(container, 0, (hwaddr)-1, info->iova_pgsizes);
container->pgsizes = info->iova_pgsizes;
/* The default in the kernel ("dma_entry_limit") is 65535. */
container->dma_max_mappings = 65535;
if (!ret) {
vfio_get_info_dma_avail(info, &container->dma_max_mappings);
vfio_get_iommu_info_migration(container, info);
if (info->flags & VFIO_IOMMU_INFO_PGSIZES) {
container->pgsizes = info->iova_pgsizes;
} else {
container->pgsizes = qemu_real_host_page_size();
}
if (!vfio_get_info_dma_avail(info, &container->dma_max_mappings)) {
container->dma_max_mappings = 65535;
}
vfio_get_iommu_info_migration(container, info);
g_free(info);
/*
* FIXME: We should parse VFIO_IOMMU_TYPE1_INFO_CAP_IOVA_RANGE
* information to get the actual window extent rather than assume
* a 64-bit IOVA address space.
*/
vfio_host_win_add(container, 0, (hwaddr)-1, container->pgsizes);
break;
}
case VFIO_SPAPR_TCE_v2_IOMMU:

2
hw/vfio/migration.c
View File

@ -806,6 +806,8 @@ static int vfio_migration_init(VFIODevice *vbasedev,
}
vbasedev->migration = g_new0(VFIOMigration, 1);
vbasedev->migration->device_state = VFIO_DEVICE_STATE_RUNNING;
vbasedev->migration->vm_running = runstate_is_running();
ret = vfio_region_setup(obj, vbasedev, &vbasedev->migration->region,
info->index, "migration");