Date: Mon, 18 Jan 2010 01:42:54 GMT From: Glen Barber <glen.j.barber@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: ports/142923: [panic] multimedia/video4bsd-kmod: panic on module load Message-ID: <201001180142.o0I1gsrv077986@www.freebsd.org> Resent-Message-ID: <201001180150.o0I1o6j7022620@freefall.freebsd.org>
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>Number: 142923 >Category: ports >Synopsis: [panic] multimedia/video4bsd-kmod: panic on module load >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-ports-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Jan 18 01:50:05 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Glen Barber >Release: FreeBSD 8.0-STABLE r202534M >Organization: >Environment: FreeBSD pegasus 8.0-STABLE FreeBSD 8.0-STABLE #2 r202534M: Sun Jan 17 19:27:54 EST 2010 root@pegasus:/usr/obj/usr/src/sys/PEGASUS i386 >Description: The multimedia/video4bsd-kmod kernel module causes panic on load, via kldload and loader.conf. The machine runs stock GENERIC with debugging enabled. The only source modification is the iwn(4) driver from CURRENT. The following backtrace is transcribed from photographs of the console. I can reproduce the panic if needed. panic: lock (video4bsd) sx does not match earlier (sleep mutex) lock cpuid = 1 KDB: enter: panic [thread pid 3670 tid 100114 ] Stopped at kdb_enter+0x3a: movl $0,kdb_why db> bt Tracing pid 3670 tid 100114 td 0xc773c240 kdb_enter(c0c9ad92,c0c9ad92,c0ca096b,f63669a4,1,...)at kdb_enter+0x3a panic(c0c9ad92,c0c9ad92,c0ca096b,f63669a4,1,...) at panic+0x136 enroll(c08889cf,c0d8cac0,20,c7a94e20,d3af6b6d,...) at enroll+0x3d5 witness_init(d3af7234,d3af6b6d,c6d291a0) at witness_init+0x128 lock_init(d3af7234,c0d90cd0,d3af6b6d,0,320000) at lock_init+0x8c sx_init_flags(d3af7234,d3af6b6d,0,0,0,...) at sx_init_flags+0xe0 v4b_init(0,0,c0c975d5,e4,0,...) at v4b_init+0x4b linker_load_module(0,f6366c48,c0c975d5,3f7,0,...) at linker_load_module+0x9fa kern_kldload(c773c240,c7870800,f6366c70,0,280d6ed4,...) at kern_kldload+0xca kldload(c773c240,f6366cf8,4,c773c240,c0d88920,...) at kldload+0x74 syscall(f6366d38) at syscall+0x2f3 Xint0x80_syscall() at Xint0x80_syscall+0x20 --- syscall (304, FreeBSD ELF32, kldload), eip = 0x280d6edb, esp = 0xbfbfe7cc, ebp = 0xbfbfecb8 --- >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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