CIFS with SMB2+ crashes with kernel BUG at lib/string.c:1052 called from smb21_set_oplock_level

Solution Verified - Updated -

Issue

  • A CIFS client with SMB3 crashes with kernel BUG at lib/string.c:1052 called from smb21_set_oplock_level

Environment

  • Red Hat Enterprise Linux 8
    • seen on kernel 4.18.0-80.el7 and 4,18.0-147.el8
  • cifs with SMB2+

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