>Number: 167793 >Category: kern >Synopsis: mbuf leak if arp address is multicast >Confidential: no >Severity: serious >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri May 11 09:20:14 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Andrey Smagin >Release: CURRENT - r235238M >Organization: >Environment: FreeBSD samnote.vvt 10.0-CURRENT FreeBSD 10.0-CURRENT #2 r235238M: Fri May 11 07:00:35 MSK 2012 r...@ns.vvt:/usr/obj/i386.i386/usr/src386/sys/SAM i386 >Description: System leak mbufs with multicast arp adresses >How-To-Repeat: Create in one box static arp table for 65533 entries 172.16.0.0/16 with multicast arp adresses, example eb:ee:00:00:xx:yy. xx yy - count number. From another box after time we will see: root samnote# netstat -m *26078/427/26505 mbufs in use (current/cache/total) *26076/170/26246/65536 mbuf clusters in use (current/cache/total/max) *26076/164 mbuf+clusters out of packet secondary zone in use (current/cache) 0/20/20/65536 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/6400 9k jumbo clusters in use (current/cache/total/max) 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max) *58671K/526K/59198K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 0/5/6656 sfbufs in use (current/peak/max) 0 requests for sfbufs denied 0 requests for sfbufs delayed 0 requests for I/O initiated by sendfile 0 calls to protocol drain routines * values will increment. after some hours network stack will fail with error: not free mbuf. By this bug I make DDOS for myself. >Fix: Don't use large number multicast arp adressed in one LAN.
>Release-Note: >Audit-Trail: >Unformatted: _______________________________________________ freebsd-bugs@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
