Date: Wed, 27 Apr 2005 20:01:28 +0200 From: Rene Ladan <r.c.ladan@student.tue.nl> To: bzeeb+freebsd+lor@zabbadoz.net, stable@freebsd.org Subject: new fxp lor Message-ID: <20050427180127.GA15351@82-168-79-254-bbxl.xdsl.tiscali.nl>
next in thread | raw e-mail | index | archive | help
[-- Attachment #1 --] Hi, I experienced this new fxp LOR (probably when ntpd started during boot): hand-copied: lock order reversal 1st 0xcc666360 inp (udpinp) @ sys/netinet/udp_usrreq.c:772 2nd 0xc14c8264 fxp0 (network driver) @ /usr/src/sys/modules/fxp/../../dev/fxp/if_fxp.c:1232 KDB: stack backtrace: kdb_backtrace+0x2e(c06fd115, c14c8264, c14a57e0, c06fe820, c06fe7bd) witness_checkorder+0x6a6(c14c8264, 9, c06fe7bd, 4d0, c0602589) _mtx_lock_flags+0x8a(c14c8264, 0, c06fe7bd, 4d0, c14c8000) fxp_start+0x37(c14c8000, 12b, 0, c14c8000) and continuing from dmesg: if_start(c14c8000,0,c0602589,184,2) at 0xc050b1c9 = if_start+0x99 ether_output_frame(c14c8000,c15d3900,6,ca422b10,ca422aac) at 0xc050c908 = ether_output_frame+0x218 ether_output(c14c8000,c15d3900,ca422b10,c16687bc,c04bbc77) at 0xc050c6de = ether_output+0x44e ip_output(c15d3900,0,ca422b0c,0,0) at 0xc05210c7 = ip_output+0x7c7 udp_output(c16662d0,c15d3900,0,0,c148fa80) at 0xc053659a = udp_output+0x53a udp_send(c1665dec,0,c15d3900,0,0) at 0xc0536da0 = udp_send+0x30 sosend(c1665dec,0,ca422c48,c15d3900,0) at 0xc04d33b1 = sosend+0x701 kern_sendit(c148fa80,d,ca422cc4,0,0) at 0xc04d9bef = kern_sendit+0x13f sendit(c148fa80,d,ca422cc4,0,810001d) at 0xc04d9a81 = sendit+0x1a1 sendto(c148fa80,ca422d14,18,431,6) at 0xc04d9d6b = sendto+0x5b syscall(2f,2f,2f,2,0) at 0xc05d9d40 = syscall+0x2a0 Xint0x80_syscall() at 0xc05c885f = Xint0x80_syscall+0x1f --- syscall (133, FreeBSD ELF32, sendto), eip = 0x28233cff, esp = 0xbfbfd4ec, ebp = 0xbfbfd518 --- followed by another new LOR: KDB: enter: witness_checkorder lock order reversal 1st 0xc066f20c udp (udp) @ /usr/src/sys/netinet/udp_usrreq.c:246 2nd 0xc14c8264 fxp0 (network driver) @ /usr/src/sys/modules/fxp/../../dev/fxp/if_fxp.c:1232 KDB: stack backtrace: kdb_backtrace(c05fd115,c14c8264,c14a57e0,c06fe820,c06fe7bd) at 0xc04b0a7e = kdb_backtrace+0x2e witness_checkorder(c14c8264,9,c06fe7bd,4d0,c0602589) at 0xc04bbb96 = witness_checkorder+0x6a6 _mtx_lock_flags(c14c8264,0,c06fe7bd,4d0,c14c8000) at 0xc048a95a = _mtx_lock_flags+0x8a fxp_start(c14c8000,12b,0,c14c8000) at 0xc06fbdc7 = fxp_start+0x37 if_start(c14c8000,0,c0602589,184,2) at 0xc050b1c9 = if_start+0x99 ether_output_frame(c14c8000,c15d6000,6,c9be5b20,c9be5abc) at 0xc050c908 = ether_output_frame+0x218 ether_output(c14c8000,c15d6000,c9be5b20,c16687bc,18a) at 0xc050c6de = ether_output+0x44e ip_output(c15d6000,0,c9be5b1c,0,0) at 0xc05210c7 = ip_output+0x7c7 icmp_send(c15d6000,0,c05a61a8,0,0) at 0xc051e567 = icmp_send+0x87 icmp_reflect(c15d6000,c15d60c8,14,c15d6100,1c) at 0xc051e490 = icmp_reflect+0x330 icmp_error(c14d1600,3,3,0,0) at 0xc051db85 = icmp_error+0x275 udp_input(c14d1600,14,c9be5c98,c048aa6a,c066e714) at 0xc053547a = udp_input+0x5ea ip_input(c14d1600,0,c0602a22,e6,c066dcd8) at 0xc051ef22 = ip_input+0x5a2 netisr_processqueue(c066dcd8,c0643a80,1,c05f8d46,c1404040) at 0xc050e64e = netisr_processqueue+0x8e swi_net(0,0,c05f72d8,269,c0643a80) at 0xc050e8a9 = swi_net+0xe9 ithread_loop(c13dc500,c9be5d48,c05f70cf,30e,0) at 0xc047dbf2 = ithread_loop+0x172 fork_exit(c047da80,c13dc500,c9be5d48) at 0xc047cc16 = fork_exit+0xc6 fork_trampoline() at 0xc05c886c = fork_trampoline+0x8 --- trap 0x1, eip = 0, esp = 0xc9be5d7c, ebp = 0 --- The box panics with automatic dump and reboot: KDB: enter: witness_checkorder panic: blockable sleep lock (sleep mutex) tty @ /usr/src/sys/kern/kern_event.c:1495 KDB: stack backtrace: Uptime: 15m33s Dumping 191 MB 16 32 48 64 80 96 112 128 144 160 176 Dump complete This is on: FreeBSD 5.4-STABLE #0: Tue Apr 26 07:30:25 CEST 2005 root@82-168-79-254-bbxl.xdsl.tiscali.nl:/usr/obj/usr/src/sys/RENE Regards, Rene -- "It won't fit on the line." -- me, 2001 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQFCb9N3vz70qa4zXcwRAuxVAKCBCZ+3f5TwhoGzXKfeFdWS7gEEsACeNm79 01NhjZxv3+NK3QQljlBafr0= =aGZX -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050427180127.GA15351>