Date: Wed, 3 Oct 2007 21:12:15 -0700 From: "\"John Merryweather Cooper\" <John Merryweather Cooper" <john_m_cooper@yahoo.com> To: "FreeBSD gnats submit" <FreeBSD-gnats-submit@FreeBSD.org> Subject: kern/116887: Lock Order Reversal with kbd and zyd Message-ID: <1191471135.1410@borgdemon3.temp.wsu.edu> Resent-Message-ID: <200710040520.l945K4N4017363@freefall.freebsd.org>
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>Number: 116887 >Category: kern >Synopsis: Lock Order Reversal with kbd and zyd >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Oct 04 05:20:04 GMT 2007 >Closed-Date: >Last-Modified: >Originator: John Merryweather Cooper >Release: FreeBSD 7.0-CURRENT amd64 >Organization: >Environment: System: FreeBSD 7.0-CURRENT #8: Mon Oct 1 12:32:21 PDT 2007 root@borgdemon3.temp.wsu.edu:/usr/obj/usr/src/sys/TURION >Description: Usually, when the zyd0 interface accepts a DHCP IP or roams, I get the attached lock order reversal. Rarely, this is accompanied by a system freeze. >How-To-Repeat: plugin my Belkin dongle >Fix: unknown --- lock-order-reversal begins here --- Oct 3 19:27:26 borgdemon3 kernel: lock order reversal: (Giant after non-sleepable) Oct 3 19:27:26 borgdemon3 kernel: 1st 0xffffff0001674cf0 inp (udpinp) @ /usr/src/sys/netinet/in_mcast.c:670 Oct 3 19:27:26 borgdemon3 kernel: 2nd 0xffffffff8078e3c0 Giant (Giant) @ /usr/src/sys/netinet/in_mcast.c:317 Oct 3 19:27:26 borgdemon3 kernel: KDB: stack backtrace: Oct 3 19:27:26 borgdemon3 kernel: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a Oct 3 19:27:26 borgdemon3 kernel: witness_checkorder() at witness_checkorder+0x64b Oct 3 19:27:26 borgdemon3 kernel: _mtx_lock_flags() at _mtx_lock_flags+0x75 Oct 3 19:27:26 borgdemon3 kernel: in_addmulti() at in_addmulti+0x1e3 Oct 3 19:27:26 borgdemon3 kernel: inp_setmoptions() at inp_setmoptions+0x111c Oct 3 19:27:26 borgdemon3 kernel: ip_ctloutput() at ip_ctloutput+0x16f Oct 3 19:27:26 borgdemon3 kernel: sosetopt() at sosetopt+0x3b Oct 3 19:27:26 borgdemon3 kernel: kern_setsockopt() at kern_setsockopt+0xa2 Oct 3 19:27:26 borgdemon3 kernel: setsockopt() at setsockopt+0x22 Oct 3 19:27:26 borgdemon3 kernel: syscall() at syscall+0x1ca Oct 3 19:27:26 borgdemon3 kernel: Xfast_syscall() at Oct 3 19:27:26 borgdemon3 kernel: Xfast_syscall+0xab Oct 3 19:27:26 borgdemon3 kernel: --- syscall (105, FreeBSD ELF64, setsockopt), rip = 0x800eb8ebc, rsp = 0x7fffffffeb18, rbp = 0x7fffffffeb90 --- --- lock-order-reversal ends here --- >Release-Note: >Audit-Trail: >Unformatted:
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