This is a note to let you know that I've just added the patch titled
drm/amdkfd: Check cgroup when returning DMABuf info
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amdkfd-check-cgroup-when-returning-dmabuf-info.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 2c09a65ed45bed5c98bd33ceaf66d413dc264f7a
Author: Mukul Joshi <mukul.joshi@xxxxxxx>
Date: Mon Feb 12 10:40:55 2024 -0500
drm/amdkfd: Check cgroup when returning DMABuf info
[ Upstream commit 9d7993a7ab9651afd5fb295a4992e511b2b727aa ]
Check cgroup permissions when returning DMA-buf info and
based on cgroup info return the GPU id of the GPU that have
access to the BO.
Signed-off-by: Mukul Joshi <mukul.joshi@xxxxxxx>
Reviewed-by: Felix Kuehling <felix.kuehling@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 08da993df1480..7d5ffc2bad793 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -1522,7 +1522,7 @@ static int kfd_ioctl_get_dmabuf_info(struct file *filep,
/* Find a KFD GPU device that supports the get_dmabuf_info query */
for (i = 0; kfd_topology_enum_kfd_devices(i, &dev) == 0; i++)
- if (dev)
+ if (dev && !kfd_devcgroup_check_permission(dev))
break;
if (!dev)
return -EINVAL;
@@ -1544,7 +1544,7 @@ static int kfd_ioctl_get_dmabuf_info(struct file *filep,
if (xcp_id >= 0)
args->gpu_id = dmabuf_adev->kfd.dev->nodes[xcp_id]->id;
else
- args->gpu_id = dmabuf_adev->kfd.dev->nodes[0]->id;
+ args->gpu_id = dev->id;
args->flags = flags;
/* Copy metadata buffer to user mode */
