Date: Fri, 25 May 2007 13:45:27 +0200 From: Volker <volker@vwsoft.com> To: freebsd-stable@FreeBSD.ORG Subject: Re: ghosthunting: machine freeze 6.2R Message-ID: <4656CC57.7010705@vwsoft.com> In-Reply-To: <4656A73E.9040109@vwsoft.com> References: <200705230717.l4N7HuPW010071@lurza.secnetix.de> <465408F9.6080302@vwsoft.com> <4654C0C4.2030405@vwsoft.com> <20070523215818.GB64723@xor.obsecurity.org> <4656A73E.9040109@vwsoft.com>
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Using a debug kernel, the machine came up quickly with this LOR after the reboot: lock order reversal: 1st 0xc077078c tcp (tcp) @ /usr/src/sys/netinet/tcp_input.c:625 2nd 0xc4f18180 pf task mtx (pf task mtx) @ /usr/src/sys/modules/pf/../../contrib/pf/net/pf.c:6386 KDB: stack backtrace: kdb_backtrace(0,ffffffff,c072fcd0,c072e1c8,c06f6124,...) at kdb_backtrace+0x29 witness_checkorder(c4f18180,9,c4f1536e,18f2) at witness_checkorder+0x578 _mtx_lock_flags(c4f18180,0,c4f1536e,18f2,c4f18180,...) at _mtx_lock_flags+0x78 pf_test(2,c4bdec00,e35c5ac4,0,0,...) at pf_test+0x81 pf_check_out(0,e35c5ac4,c4bdec00,2,0) at pf_check_out+0x3d pfil_run_hooks(c0770340,e35c5b40,c4bdec00,2,0,...) at pfil_run_hooks+0xc9 ip_output(c50c8200,0,e35c5b0c,0,0,0) at ip_output+0x83a tcp_respond(0,c4f85810,c4f85824,c50c8200,0,7a481ad6,4) at tcp_respond+0x3e1 tcp_input(c50c8200,14,1,93d306d9,0,...) at tcp_input+0x3124 ip_input(c50c8200) at ip_input+0x785 netisr_processqueue(c076dfd8) at netisr_processqueue+0x6e swi_net(0) at swi_net+0xc2 ithread_execute_handlers(c4afca78,c4b4b180) at ithread_execute_handlers+0xe6 ithread_loop(c4adb990,e35c5d38,c4adb990,c0505918,0,...) at ithread_loop+0x67 fork_exit(c0505918,c4adb990,e35c5d38) at fork_exit+0xa0 fork_trampoline() at fork_trampoline+0x8 --- trap 0x1, eip = 0, esp = 0xe35c5d6c, ebp = 0 --- Expensive timeout(9) function: 0xc0528fb4(0) 0.002565972 s Is it a known LOR? `uname -a' FreeBSD ... 6.2-RELEASE-p5 FreeBSD 6.2-RELEASE-p5 #0: Fri May 25 12:34:43 CEST 2007 root@...:/usr/obj/usr/src/sys/GwMbg.debug i386 I'll keep watching this machine now it has debug functionality in kernel. Volker
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