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vduse: take out allocations from vduse_dev_alloc_coherent

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[ Upstream commit 489d765206 ]

The function vduse_dev_alloc_coherent will be called under rwlock in
next patches.  Make it out of the lock to avoid increasing its fail
rate.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20260119143306.1818855-10-eperezma@redhat.com>
Stable-dep-of: 9c15238034 ("VDUSE: avoid leaking information to userspace")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eugenio Pérez
2026-08-03 11:22:09 +02:00
committed by Greg Kroah-Hartman
parent db5c554b36
commit 7764e9c727
2 changed files with 1 additions and 3 deletions
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drivers/vdpa/vdpa_user/iova_domain.c
-3
View File
@@ -526,7 +526,6 @@ void vduse_domain_free_coherent(struct vduse_iova_domain *domain, size_t size,
struct iova_domain *iovad = &domain->consistent_iovad;
struct vhost_iotlb_map *map;
struct vdpa_map_file *map_file;
phys_addr_t pa;
spin_lock(&domain->iotlb_lock);
map = vhost_iotlb_itree_first(domain->iotlb, (u64)dma_addr,
@@ -538,12 +537,10 @@ void vduse_domain_free_coherent(struct vduse_iova_domain *domain, size_t size,
map_file = (struct vdpa_map_file *)map->opaque;
fput(map_file->file);
kfree(map_file);
pa = map->addr;
vhost_iotlb_map_free(domain->iotlb, map);
spin_unlock(&domain->iotlb_lock);
vduse_domain_free_iova(iovad, dma_addr, size);
free_pages_exact(phys_to_virt(pa), size);
}
static vm_fault_t vduse_domain_mmap_fault(struct vm_fault *vmf)
drivers/vdpa/vdpa_user/vduse_dev.c
+1
View File
@@ -961,6 +961,7 @@ static void vduse_dev_free_coherent(union virtio_map token, size_t size,
domain = vdev->domain;
vduse_domain_free_coherent(domain, size, dma_addr, attrs);
free_pages_exact(vaddr, size);
}
static bool vduse_dev_need_sync(union virtio_map token, dma_addr_t dma_addr)