This is a note to let you know that I've just added the patch titled
KVM: use after free in kvm_ioctl_create_device()
to the 4.8-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:
kvm-use-after-free-in-kvm_ioctl_create_device.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a0f1d21c1ccb1da66629627a74059dd7f5ac9c61 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Wed, 30 Nov 2016 22:21:05 +0300
Subject: KVM: use after free in kvm_ioctl_create_device()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
commit a0f1d21c1ccb1da66629627a74059dd7f5ac9c61 upstream.
We should move the ops->destroy(dev) after the list_del(&dev->vm_node)
so that we don't use "dev" after freeing it.
Fixes: a28ebea2adc4 ("KVM: Protect device ops->create and list_add with kvm->lock")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Radim Krčmář <rkrcmar@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
virt/kvm/kvm_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2852,10 +2852,10 @@ static int kvm_ioctl_create_device(struc
ret = anon_inode_getfd(ops->name, &kvm_device_fops, dev, O_RDWR | O_CLOEXEC);
if (ret < 0) {
- ops->destroy(dev);
mutex_lock(&kvm->lock);
list_del(&dev->vm_node);
mutex_unlock(&kvm->lock);
+ ops->destroy(dev);
return ret;
}
Patches currently in stable-queue which might be from dan.carpenter@xxxxxxxxxx are
queue-4.8/drm-i915-don-t-touch-null-sg-on-i915_gem_object_get_pages_gtt-error.patch
queue-4.8/kvm-use-after-free-in-kvm_ioctl_create_device.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html