----- Original Message ----- > From: "Steve French" <smfrench@xxxxxxxxx> > To: "Andrew Martin" <amartin@xxxxxxxxxxx> > Cc: linux-cifs@xxxxxxxxxxxxxxx, "samba-technical" <samba-technical@xxxxxxxxxxxxxxx> > Sent: Tuesday, September 29, 2015 11:21:25 AM > Subject: Re: "CIFS VFS: SMB response too short (9 bytes)" when copying data from CIFS mount > > It sounds pretty straightforward if both wireshark and the Linux > kernel client agree and say that this old Samba server sent a > malformed response (presumably a CIFS ReadX response). Note that this > is an old version of Samba server - Samba 3.6 was released more than 4 > years ago. > > Try turning off unix extensions on the mount and/or setting rsize > smaller (which might change the behavior of the Samba server read > response). So try > 1) adding something like "rsize=60000" to the options you pass to the > mount command > 2) and as a different experiment try mounting with "nounix" to disable > CIFS unix extensions which would also have the affect of reducing the > maximum read size > 3) another option to try is to set max protocols in the server's > smb.conf to enable SMB2.0 support and try "vers=2.0" on mount > > My guess is that the bug is related to large CIFS read processing in > this old version of Samba. > > I also want to --- strongly --- encourage upgrade from Samba 3.6.3 to > at least Samba 4.1 (I use Samba 4.3). The additional security > features and capabilities which SMB2.1 and SMB3 bring (not just the > new protocol features and improved performance) are VERY helpful and > very important for security. > Steve, It looks like using either "nounix" or "rsize=60000" fixes the read error! I will also look into upgrading to Samba 4.1 ASAP - I would like to take advantage of the security and performance improvement of a more modern SMB protocol. Thanks again! Andrew -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
