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cifs: print warning mounting with vers=1.0

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We really, really don't want people using insecure dialects
unless they realize what they are doing ...

Add mount warning if mounting with vers=1.0 (older SMB1/CIFS
dialect) instead of the default (SMB2.1 or later, typically
SMB3.1.1).

Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
This commit is contained in:
Steve French 2020-02-28 01:32:37 -06:00
parent cf5371ae46
commit 8fe0c2c2cb
1 changed files with 3 additions and 0 deletions
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3
fs/cifs/connect.c
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@ -1471,6 +1471,9 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol, bool is_smb3)
cifs_dbg(VFS, "vers=1.0 (cifs) not permitted when mounting with smb3\n");
return 1;
}
cifs_dbg(VFS, "Use of the less secure dialect vers=1.0 "
"is not recommended unless required for "
"access to very old servers\n");
vol->ops = &smb1_operations;
vol->vals = &smb1_values;
break;