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? On Mon, Sep 28, 2015 at 5:39 PM, Andrew Martin <amartin@xxxxxxxxxxx> wrote: > Hello, > > I have tested this setup on Ubuntu 14.04 using 3.13.0-32-generic and > 3.19.0-28-generic with the same results (cifs-utils 6.0 in both cases). I have a > CIFS mountpoint set up on the server with the following options: > ro,relatime,vers=1.0,cache=strict,username=myusername,domain=EXAMPLE,uid=0,noforceuid,gid=0,noforcegid,addr=192.168.1.4,unix,posixpaths,serverino,acl,rsize=1048576,wsize=65536,actimeo=1 0 0 > > I am then using rsync to sync data from the mountpoint to a local directory. > Shortly after starting rsync, I see dmesg fill up with this message repeated > hundreds of times: > CIFS VFS: SMB response too short (9 bytes) > > At this point, if I watch the df output I see that no new data is being synced > locally. If I strace the rsync process, this sometimes makes rsync continue > syncing data for a minute or two, but eventually it stops again. Note that I > encountered this same issue a few months ago using perl: > http://permalink.gmane.org/gmane.linux.kernel.cifs/10640 > > What can I do to debug this? Is there a bug in the CIFS kernel driver? > > Thanks, > > Andrew Martin > -- > 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 -- Thanks, Steve -- 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
