This is a note to let you know that I've just added the patch titled
drm/i915/gvt: Get reference to KVM iff attachment to VM is successful
to the 6.0-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-i915-gvt-get-reference-to-kvm-iff-attachment-to-vm-is-successful.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9ed1fdee9ee324f3505ff066287ee53143caaaa2 Mon Sep 17 00:00:00 2001
From: Sean Christopherson <seanjc@xxxxxxxxxx>
Date: Fri, 11 Nov 2022 00:22:24 +0000
Subject: drm/i915/gvt: Get reference to KVM iff attachment to VM is successful
From: Sean Christopherson <seanjc@xxxxxxxxxx>
commit 9ed1fdee9ee324f3505ff066287ee53143caaaa2 upstream.
Get a reference to KVM if and only if a vGPU is successfully attached to
the VM to avoid leaking a reference if there's no available vGPU. On
open_device() failure, vfio_device_open() doesn't invoke close_device().
Fixes: 421cfe6596f6 ("vfio: remove VFIO_GROUP_NOTIFY_SET_KVM")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/20221111002225.2418386-2-seanjc@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gvt/kvmgt.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -765,8 +765,6 @@ static int intel_vgpu_open_device(struct
return -ESRCH;
}
- kvm_get_kvm(vgpu->vfio_device.kvm);
-
if (__kvmgt_vgpu_exist(vgpu))
return -EEXIST;
@@ -777,6 +775,7 @@ static int intel_vgpu_open_device(struct
vgpu->track_node.track_write = kvmgt_page_track_write;
vgpu->track_node.track_flush_slot = kvmgt_page_track_flush_slot;
+ kvm_get_kvm(vgpu->vfio_device.kvm);
kvm_page_track_register_notifier(vgpu->vfio_device.kvm,
&vgpu->track_node);
Patches currently in stable-queue which might be from seanjc@xxxxxxxxxx are
queue-6.0/kvm-x86-xen-validate-port-number-in-schedop_poll.patch
queue-6.0/init-kconfig-fix-cc_has_asm_goto_tied_output-test-wi.patch
queue-6.0/drm-i915-gvt-get-reference-to-kvm-iff-attachment-to-vm-is-successful.patch
queue-6.0/kvm-x86-xen-only-do-in-kernel-acceleration-of-hypercalls-for-guest-cpl0.patch
queue-6.0/kvm-update-gfn_to_pfn_cache-khva-when-it-moves-within-the-same-page.patch
