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virtio: Protect vqs list access

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[ Upstream commit 0e566c8f0f2e8325e35f6f97e13cde5356b41814 ]

VQs may be accessed to mark the device broken while they are
created/destroyed. Hence protect the access to the vqs list.

Fixes: e2dcdfe95c ("virtio: virtio_break_device() to mark all virtqueues broken.")
Signed-off-by: Parav Pandit <parav@nvidia.com>
Link: https://lore.kernel.org/r/20210721142648.1525924-4-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Parav Pandit
2021-07-21 17:26:47 +03:00
committed by Sasha Levin
parent 9108120fbe
commit 293180f593
3 changed files with 10 additions and 0 deletions
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include/linux/virtio.h
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@@ -110,6 +110,7 @@ struct virtio_device {
bool config_enabled;
bool config_change_pending;
spinlock_t config_lock;
spinlock_t vqs_list_lock; /* Protects VQs list access */
struct device dev;
struct virtio_device_id id;
const struct virtio_config_ops *config;