----- Original Message ----- > From: "Steve French" <smfrench@xxxxxxxxx> > To: "Andrew Martin" <amartin@xxxxxxxxxxx> > Cc: linux-cifs@xxxxxxxxxxxxxxx > Sent: Monday, September 28, 2015 6:32:51 PM > Subject: Re: "CIFS VFS: SMB response too short (9 bytes)" when copying data from CIFS mount > > It is possible that it is a cifs client bug or a server bug but hard > to tell without seeing the trace. Obviously the client message > indicates that the SMB response from the server was invalid (malformed > due to server bug) but hard to prove that without looking at a network > trace. See the mention of wireshark at > > https://wiki.samba.org/index.php/LinuxCIFS_troubleshooting > > > Also it may be better for many use cases to mount with SMB3 > ("vers=3.0") rather than the ancient cifs dialect (unless the server > is Samba where there are "posix extensions" that the client can take > advantage of). > > What is the server version? > Steve, The server is Ubuntu 12.04 with Samba 3.6.3, so I am limited to vers=1.0. I attempted to pass vers=2.0 (since it looks like basic SMB2 support was available in Samba 3.6.3), however it failed to mount with this error: mount error(112): Host is down Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) Looking at the Wireshark capture when the "SMB response too short" message is being printed, I see the following queries sent before the malformed packet: <client> <server> SMB 268 Trans2 Request, QUERY_PATH_INFO, Query File Unix Basic, Path: /path/to/file.txt <server> <client> SMB 230 Trans2 Response, QUERY_PATH_INFO <client> <server> SMB 129 Read AndX Request, FID: 0x3134, 131022 bytes at offset 262144 <server> <client> SMB 79 [Malformed Packet] - Expert Info (Error/Malformed): Malformed Packet (Exception occurred) The server's samba log for the client during this period: http://pastebin.com/Y0diqhGY I also set /proc/fs/cifs/cifsFYI to 7 and captured the following output: http://pastebin.com/CfPUtBQg Note that the Samba share definition is as follows: http://pastebin.com/0aVCaRJH Thanks, 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
