VMCI: Use set_page_dirty_lock() when unregistering guest memory

When the VMCI host support releases guest memory in the case where
the VM was killed, the pinned guest pages aren't locked. Use
set_page_dirty_lock() instead of set_page_dirty().

Testing done: Killed VM while having an active VMCI based vSocket
connection and observed warning from ext4. With this fix, no
warning was observed. Ran various vSocket tests without issues.

Fixes: 06164d2b72aa ("VMCI: queue pairs implementation.")
Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: Jorgen Hansen <jhansen@vmware.com>
Link: https://lore.kernel.org/r/1611160360-30299-1-git-send-email-jhansen@vmware.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c
index a3691c1..525ef96 100644 (file)
--- a/drivers/misc/vmw_vmci/vmci_queue_pair.c
+++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c
@@ -630,7 +630,7 @@ static void qp_release_pages(struct page **pages,
 
        for (i = 0; i < num_pages; i++) {
                if (dirty)
-                       set_page_dirty(pages[i]);
+                       set_page_dirty_lock(pages[i]);
 
                put_page(pages[i]);
                pages[i] = NULL;