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vfio/iommufd: Restore vbasedev's reference to hwpt after CPR transfer

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After CPR transfer, if there are more than one VFIO devices, device is
not added to hwpt->device_list and its reference to hwpt isn't restored
on destination. We still need to call iommufd_cdev_attach_container() to
restore it after a matching container is found, or else SIGSEV triggers.

Fixes: 4296ee0745 ("vfio/iommufd: reconstruct device")
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Steve Sistare <steven.sistare@oracle.com>
Link: https://lore.kernel.org/qemu-devel/20250928085432.40107-5-zhenzhong.duan@intel.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Zhenzhong Duan
2025-09-28 04:54:30 -04:00
committed by Cédric Le Goater
parent d59db04aed
commit 8bf49fff0d
1 changed files with 2 additions and 3 deletions
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hw/vfio/iommufd.c
+2 -3
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@@ -560,10 +560,9 @@ static bool iommufd_cdev_attach(const char *name, VFIODevice *vbasedev,
continue;
}
if (!cpr_is_incoming()) {
if (!cpr_is_incoming() ||
(vbasedev->cpr.ioas_id == container->ioas_id)) {
res = iommufd_cdev_attach_container(vbasedev, container, &err);
} else if (vbasedev->cpr.ioas_id == container->ioas_id) {
res = true;
} else {
continue;
}