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Ubuntu 18.04. I have a CIFS mount that apparently blew up somehow. My log is being flooded every 2 seconds by this:

[4648495.276604] Status code returned 0xc000006d STATUS_LOGON_FAILURE
[4648495.276616] CIFS VFS: Send error in SessSetup = -13
[4648495.278630] CIFS VFS: Free previous auth_key.response = 000000001c0e7ea4
[4648495.331162] Status code returned 0xc000006d STATUS_LOGON_FAILURE
[4648495.331177] CIFS VFS: Send error in SessSetup = -13

Things I have tried:

> sudo umount -f -l -a -t cifs
> sudo modprobe -r -f cifs
modprobe: FATAL: Module cifs is in use.

> mount | grep cifs | wc
  0       0       0

I am able to remount the remote drive, and it works, but the broken connection is apparently still there in the kernel wreaking havoc.

How can I stop these messages?

Is there any way to reset the CIFS kernel module, or worst case just filter the messages out of the logs?

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