Issue #3032 has been reported by liweitianux. ---------------------------------------- Bug #3032: IPFW3: memory leakage? objcache(xxx): Exhausted! http://bugs.dragonflybsd.org/issues/3032
* Author: liweitianux * Status: New * Priority: High * Assignee: * Category: Networking * Target version: ---------------------------------------- Recently, I setup a small VPS (512MB RAM) with DFly(v4.8)+Nginx+Postfix+Dovecot services as my personal email server, and configured IPFW3 as the firewall. However, the system hang/freeze with these warnings after some time, and can only be reset: ------------------------------------------------------ Warning, objcache(mbuf pkt hdr): Exhausted! Warning, objcache(mbuf pkt hdr + cluster): Exhausted! ------------------------------------------------------ The VPS can run rather smoothly without IPFW3 enabled. So I tried to monitor the mbuf usages reported by "netstat -m", and found the "mbufs in use" was continuously increasing, and therefore, the mbufs are exhausted finally which freeze the whole system!! ====================================================== In addition, I tried to reproduce the IPFW3 problem in my home NAS (DFly master@2017-02-24, 8GB RAM, Nginx+ownCloud+PostgreSQL+transmission bt), and the system just paniced with following messages: ------------------------------------------------------ stack pointer = 0x10:0xffffff81db763720 frame pointer = 0x10:0xffffff81db763770 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = Idle current thread = pri 12 trap number = 9 panic: general protection fault cpuid = 2 Trace beginning at frame 0xffffff81db7634e8 panic() at panic+0x236 0xffffffff805e5d56 panic() at panic+0x236 0xffffffff805e5d56 trap_fatal() at trap_fatal+0x2c3 0xffffffff80a58203 trap() at trap+0x19a 0xffffffff80a58a8a calltrap() at calltrap+0x9 0xffffffff80a4125f --- trap 0000000000000009, rip = ffffffff84840dd4, rsp = ffffff81db763710, rbp = ffffff81db763770 --- ipfw_sync_send_state() at ipfw_sync_send_state+0x54 0xffffffff84840dd4 check_keep_state() at check_keep_state+0x196 0xffffffff84821d76 boot() called on cpu#2 Uptime: 12d1h18m34s Physical memory: 8113 MB Dumping 3889 MB:Warning, objcache(cluster mbuf): Exhausted! ------------------------------------------------------ For unknown reason, I failed to get a core dump. I set "debug.debugger_on_panic=0" and have a 16GB swap partition (dm_crypt). An example "netstat -m" report looks like: ------------------------------------------------------ 202336/293376 mbufs in use (current/max): 522/17248 mbuf clusters in use (current/max) 0/8368 mbuf jumbo clusters in use (current/max) 202839 mbufs and mbuf clusters allocated to data 19 mbufs and mbuf clusters allocated to packet headers 102212 Kbytes allocated to network (56% of mb_map in use) 0 requests for memory denied 0 requests for memory delayed 0 calls to protocol drain routines ------------------------------------------------------ With IPFW3 enabled, the above "mbufs in use" keeps increasing! Flushing the firewall rules does not help either. I also tried to *disable* the IPFW3 by setting "net.inet.ip.fw3.enable=1", and the mbuf usages *stop increase* (but don't decrease either). Therefore, I suspect there may be *memory leakages* within IPFW3?? What's additional information can I provide to help solve this problem? Cheers, Aly P.S., my IPFW3 rules (example output of "ipfw3 show"): ------------------------------------------------------ 00010 0 0 allow via lo0 00100 14446903 15349529336 check-state 00200 168513 106435518 allow tcp from me out via em0 keep-state 00201 5853336 6205262652 allow udp from me out via em0 keep-state 00202 1 56 allow icmp from me out via em0 keep-state 00301 3 168 deny from 172.16.0.0/12 in via em0 00303 0 0 deny from 127.0.0.0/8 in via em0 00304 3 984 deny from 0.0.0.0/8 in via em0 00305 1 328 deny from 169.254.0.0/16 in via em0 00306 0 0 deny from 192.0.2.0/24 in via em0 00307 0 0 deny from 204.152.64.0/23 in via em0 00308 0 0 deny from 224.0.0.0/3 in via em0 00310 2012 239927 allow icmp in via em0 keep-state 00315 0 0 deny tcp dst-port 113 in via em0 00320 0 0 deny tcp dst-port 137 in via em0 00321 0 0 deny tcp dst-port 138 in via em0 00322 0 0 deny tcp dst-port 139 in via em0 00323 0 0 deny tcp dst-port 81 in via em0 00332 7033 1814028 deny tcp established in via em0 00500 68 11257 allow tcp dst-port 8860 in via em0 keep-state 00510 0 0 allow tcp dst-port 80 in via em0 keep-state 00512 0 0 allow tcp dst-port 8800 in via em0 keep-state 00513 9281 3765242 allow tcp dst-port 8801 in via em0 keep-state 00700 0 0 allow tcp dst-port 22000 in via em0 keep-state 00701 737 86229 allow udp dst-port 21027 in via em0 keep-state 00800 8563201 9051221125 allow dst-port 51413 in via em0 keep-state 00801 515 263178 allow tcp from 192.168.1.0/24 dst-port 9091 in via em0 keep-state 60000 1253 185397 deny in via em0 65535 414 59978 deny ------------------------------------------------------ -- You have received this notification because you have either subscribed to it, or are involved in it. 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