MIRRORS/linux-yocto
1
0
Fork 0
mirror of git://git.yoctoproject.org/linux-yocto.git synced 2025-10-22 23:13:01 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

um: vfio: Prevent duplicate device assignments

Browse Source 
Ensure devices are assigned only once. Reject subsequent requests
for duplicate assignments.

Fixes: a0e2cb6a90 ("um: Add VFIO-based virtual PCI driver")
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20250606124428.148164-4-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Tiwei Bie 2025-06-06 20:44:27 +08:00 committed by Johannes Berg
parent c55c7a85e0
commit bc4e2ae081
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/um/drivers/vfio_kern.c
View File

@ -570,6 +570,17 @@ static void uml_vfio_release_device(struct uml_vfio_device *dev)
kfree(dev);
}
static struct uml_vfio_device *uml_vfio_find_device(const char *device)
{
struct uml_vfio_device *dev;
list_for_each_entry(dev, &uml_vfio_devices, list) {
if (!strcmp(dev->name, device))
return dev;
}
return NULL;
}
static int uml_vfio_cmdline_set(const char *device, const struct kernel_param *kp)
{
struct uml_vfio_device *dev;
@ -582,6 +593,9 @@ static int uml_vfio_cmdline_set(const char *device, const struct kernel_param *k
uml_vfio_container.fd = fd;
}
if (uml_vfio_find_device(device))
return -EEXIST;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;