From: David Howells <dhowells@redhat.com>
To: Paulo Alcantara <pc@manguebit.org>
Cc: dhowells@redhat.com, "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Simon Horman <horms@kernel.org>,
Frank Sorenson <sorenson@redhat.com>,
netdev@vger.kernel.org, linux-cifs@vger.kernel.org,
Pierguido Lambri <plambri@redhat.com>
Subject: Re: [PATCH net-next] net: dns_resolver: allow shorter names in dns_query()
Date: Thu, 23 Jul 2026 13:23:30 +0100 [thread overview]
Message-ID: <615376.1784809410@warthog.procyon.org.uk> (raw)
In-Reply-To: <20260722-net-dns_resolver-v1-1-c3385898ccf9@manguebit.org>
Paulo Alcantara <pc@manguebit.org> wrote:
> Customer reported a problem with mounting CIFS shares where the server
> hostname was 2 chars long. Turned out that the CIFS client wasn't
> able to resolve NetBIOS names shorter than 3 chars.
>
> Fix this by allowing a minimum of one character per hostname in
> dns_query().
>
> Reproducer with samba server:
>
> # 'ab' and 'srv' hotnames resolve to same ip address
> $ ssh srv ln -s 'msdfs:\\ab\\share' /home/shares/dfs/link1
> $ mount.cifs //srv/dfs/link1 /mnt -o ... [EINVAL]
>
> Reported-by: Pierguido Lambri <plambri@redhat.com>
> Signed-off-by: Paulo Alcantara <pc@manguebit.org>
Acked-by: David Howells <dhowells@redhat.com>
prev parent reply other threads:[~2026-07-23 12:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-22 21:28 [PATCH net-next] net: dns_resolver: allow shorter names in dns_query() Paulo Alcantara
2026-07-23 12:23 ` David Howells [this message]
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