smb: client: Handle kstrdup failures for passwords

Paulo Alcantararequested to merge
paalcant/centos-stream-9:RHEL-65939 into main

JIRA: https://issues.redhat.com/browse/RHEL-65939

CVE: CVE-2024-50120

Signed-off-by: Paulo Alcantara paalcant@redhat.com

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