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cifs: connect to servername instead of IP for IPC$ share 

This patch is required allows access to a Microsoft fileserver failover
cluster behind a 1:1 NAT firewall.

The change also provides stronger context for authentication and share
connection (see MS-SMB2 3.3.5.7 and MS-SRVS 3.1.6.8) as noted by
Tom Talpey, and addresses comments about the buffer size for the UNC
made by Aurélien Aptel.

Signed-off-by: Thomas Werschlein <thomas.werschlein@geo.uzh.ch>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Tom Talpey <ttalpey@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
CC: Stable <stable@vger.kernel.org>
hifive-unleashed-5.1
Thomas Werschlein 2018-08-30 18:29:20 +02:00 committed by Steve French
parent f801568332
commit 395a2076b4
1 changed files with 1 additions and 1 deletions
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2
fs/cifs/connect.c
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@ -2547,7 +2547,7 @@ cifs_setup_ipc(struct cifs_ses *ses, struct smb_vol *volume_info)
if (tcon == NULL)
return -ENOMEM;
snprintf(unc, sizeof(unc), "\\\\%s\\IPC$", ses->serverName);
snprintf(unc, sizeof(unc), "\\\\%s\\IPC$", ses->server->hostname);
/* cannot fail */
nls_codepage = load_nls_default();