Date: Thu, 17 Dec 2009 18:46:35 GMT From: Bruce Cran <bruce@cran.org.uk> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/141720: [sctp] [lor] [hang] sctp-create vs. sctp-it causes system hang Message-ID: <200912171846.nBHIkZYO069013@www.freebsd.org> Resent-Message-ID: <200912171850.nBHIo3tj069816@freefall.freebsd.org>
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>Number: 141720 >Category: kern >Synopsis: [sctp] [lor] [hang] sctp-create vs. sctp-it causes system hang >Confidential: no >Severity: serious >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Dec 17 18:50:03 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Bruce Cran >Release: 9.0-CURRENT >Organization: >Environment: FreeBSD tau.draftnet 9.0-CURRENT FreeBSD 9.0-CURRENT #0: Mon Dec 14 15:44:18 GMT 2009 brucec@tau.draftnet:/usr/obj/usr/src/sys/GENERIC amd64 >Description: When running lots of copies of the SCTP API tester, 'api_tests', the console sometimes hangs, though keypresses are still recognized. Breaking into the debugger shows that a LOR has occurred, but attempting to continue running the system results in the system eventually freezing. lock order reversal: 1st 0xffffff00300c5488 sctp-create (inp_create) @ /usr/src/sys/netinet/sctp_input.c:4897 2nd 0xffffffff80e11df0 sctp-it (iterator) @ /usr/src/sys/netinet/sctp_pcb.c:3102 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a _witness_debugger() at _witness_debugger+0x2e _witness_checkorder() at witness_checkorder+0x81e _mtx_lock_flags() at _mtx_lock_flags+0x78 sctp_inpcb_free() at sctp_inpcb_free+0x50 sctp_process_cookie_new() at sctp_process_cookie_new+0x646 sctp_process_control() at sctp_process_control+0x5eb2 sctp_common_input_processing() at sctp_common_input_processing+0x1b1 sctp_input_with_port() at sctp_input_with_port+0x388 ip_input() at ip_input+0xbc swi_net() at swi_net+0x151 intr_event_execute_handlers() at intr_event_execute_handlers+0x66 ithread_loop() at ithread_loop+0xb2 fork_exit() at fork_exit+0x12a fork_trampoline() at fork_trampoline+0xe --- trap 0, rip = 0, rsp = 0xffffff8000047d30, rbp = 0 --- >How-To-Repeat: Run >100 copies of the api_tests application from sctpCVS/APPS/apitester . >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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