[PATCH] vhost-vdpa: honor CAP_IPC_LOCK
From: Jason Wang <hidden>
Date: 2021-03-02 09:49:56
Also in:
kvm, lkml, netdev
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
When CAP_IPC_LOCK is set we should not check locked memory against rlimit as what has been implemented in mlock(). Signed-off-by: Jason Wang <redacted> --- drivers/vhost/vdpa.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index ef688c8c0e0e..e93572e2e344 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c@@ -638,7 +638,8 @@ static int vhost_vdpa_process_iotlb_update(struct vhost_vdpa *v, mmap_read_lock(dev->mm); lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT; - if (npages + atomic64_read(&dev->mm->pinned_vm) > lock_limit) { + if (!capable(CAP_IPC_LOCK) && + (npages + atomic64_read(&dev->mm->pinned_vm) > lock_limit)) { ret = -ENOMEM; goto unlock; }
--
2.18.1
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