Package: smbclient Version: 2:4.2.14+dfsg-0+deb8u2 Severity: important Hello, after upgrading my kernel from 4.0.8 to 4.0.9 I am getting connection floods to my FreeNAS samba server from my debian machine. I never had this issue with 4.0.8
Linux dnet64 4.9.0-0.bpo.1-amd64 #1 SMP Debian 4.9.2-2~bpo8+1 (2017-01-26) x86_64 GNU/Linux ii smbclient 2:4.2.14+dfsg-0+deb8u2 amd64 command-line SMB/CIFS clients for Unix After mouting the cifs share(s) everything is OK for about 10 minutes, then a flood of connections happens. Here is an extract of 'netstat -an' run every second. Only one or two connections are shown for every 'netstat -an' run. The connections are opening and closing at an incredible speed (nethogs goes to 100% and doesn't show anything because it's overwhelmed). gkrellm reports about 70k/Sec traffic due to this. See how the source port numbers increase increadibly quickly to get an idea of how many connections are really happening... .... tcp 0 1 10.0.2.15:55044 192.168.2.88:445 SYN_SENT tcp 0 1 10.0.2.15:55252 192.168.2.88:445 SYN_SENT tcp 0 0 10.0.2.15:55288 192.168.2.88:445 ESTABLISHED tcp 0 1 10.0.2.15:55314 192.168.2.88:445 SYN_SENT tcp 0 1 10.0.2.15:55348 192.168.2.88:445 SYN_SENT tcp 0 0 10.0.2.15:55396 192.168.2.88:445 ESTABLISHED tcp 0 1 10.0.2.15:55454 192.168.2.88:445 SYN_SENT tcp 0 0 10.0.2.15:55500 192.168.2.88:445 ESTABLISHED tcp 0 0 10.0.2.15:55544 192.168.2.88:445 ESTABLISHED tcp 0 42 10.0.2.15:55586 192.168.2.88:445 ESTABLISHED tcp 0 0 10.0.2.15:55630 192.168.2.88:445 ESTABLISHED tcp 0 0 10.0.2.15:55676 192.168.2.88:445 ESTABLISHED tcp 0 0 10.0.2.15:55720 192.168.2.88:445 ESTABLISHED tcp 0 1 10.0.2.15:55770 192.168.2.88:445 SYN_SENT tcp 1 0 10.0.2.15:55820 192.168.2.88:445 CLOSE_WAIT tcp 0 1 10.0.2.15:55868 192.168.2.88:445 SYN_SENT tcp 0 0 10.0.2.15:55912 192.168.2.88:445 ESTABLISHED tcp 0 0 10.0.2.15:55962 192.168.2.88:445 ESTABLISHED tcp 1 0 10.0.2.15:56010 192.168.2.88:445 CLOSE_WAIT tcp 0 1 10.0.2.15:56058 192.168.2.88:445 SYN_SENT tcp 0 0 10.0.2.15:56056 192.168.2.88:445 LAST_ACK tcp 0 0 10.0.2.15:56104 192.168.2.88:445 ESTABLISHED tcp 0 0 10.0.2.15:56162 192.168.2.88:445 ESTABLISHED tcp 0 0 10.0.2.15:56202 192.168.2.88:445 ESTABLISHED tcp 0 1 10.0.2.15:56246 192.168.2.88:445 SYN_SENT tcp 0 0 10.0.2.15:56290 192.168.2.88:445 ESTABLISHED ....etc. Rebooting in 4.0.8 makes the issue go away, and I can have the shares mounted as long as I want without a connection flood. Hence I assume that it's a smbclient + Kernel 4.0.9 issue -- System Information: Debian Release: 8.7 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.9.0-0.bpo.1-amd64 (SMP w/2 CPU cores) Locale: LANG=en_DK.UTF-8, LC_CTYPE=en_DK.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: sysvinit (via /sbin/init) Versions of packages smbclient depends on: ii dpkg 1.17.27 ii libarchive13 3.1.2-11+deb8u3 ii libbsd0 0.7.0-2 ii libc6 2.19-18+deb8u7 ii libpopt0 1.16-10 ii libreadline6 6.3-8+b3 ii libsmbclient 2:4.2.14+dfsg-0+deb8u2 ii libtalloc2 2.1.2-0+deb8u1 ii libtevent0 0.9.28-0+deb8u1 ii samba-common 2:4.2.14+dfsg-0+deb8u2 ii samba-libs 2:4.2.14+dfsg-0+deb8u2 smbclient recommends no packages. Versions of packages smbclient suggests: ii cifs-utils 2:6.4-1 pn heimdal-clients <none> -- no debconf information
