Date: Fri, 20 Mar 2009 10:36:08 +0100 (CET) From: michal@hanu.la To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/132852: LOR between sysctl and acpi_ibm Message-ID: <20090320093609.058458061@roo.7f000001.org> Resent-Message-ID: <200903201210.n2KCA3l5074542@freefall.freebsd.org>
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>Number: 132852 >Category: kern >Synopsis: LOR between sysctl and acpi_ibm >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Mar 20 12:10:03 UTC 2009 >Closed-Date: >Last-Modified: >Originator: User & >Release: FreeBSD 7.2-PRERELEASE i386 >Organization: >Environment: System: FreeBSD roo.7f000001.org 7.2-PRERELEASE FreeBSD 7.2-PRERELEASE #5: Thu Mar 19 12:52:23 CET 2009 root@roo.7f000001.org:/usr/obj/usr/src/sys/ROO i386 lock order reversal: 1st 0xc08bc294 sysctl lock (sysctl lock) @ /usr/src/sys/kern/kern_sysctl.c:1501 2nd 0xc0b1b184 ACPI IBM extras (ACPI IBM extras) @ /usr/src/sys/modules/acpi/acpi_ibm/../../../dev/acpi_support/acpi_ibm.c:484 KDB: stack backtrace: db_trace_self_wrapper(c08345a1,c0b1b184,c0b19fe5,c0b19fe5,c0b19d90,...) at db_trace_self_wrapper+0x26 witness_checkorder(c0b1b184,9,c0b19d90,1e4,f4556b30,...) at witness_checkorder+0x555 _sx_xlock(c0b1b184,0,c0b19d90,1e4,c08bbcf0,...) at _sx_xlock+0x30 acpi_ibm_sysctl(c4e51180,c4e46080,0,f4556ba4,f4556ba4,...) at acpi_ibm_sysctl+0x3f sysctl_root(f4556ba4,0,c083160f,5dd,c60d98c0,...) at sysctl_root+0xa2 userland_sysctl(c60d98c0,f4556c10,4,0,bfbfe4a4,...) at userland_sysctl+0xfb __sysctl(c60d98c0,f4556cf8,18,c0835343,c0870a90,...) at __sysctl+0x9f syscall(f4556d38) at syscall+0x18a Xint0x80_syscall() at Xint0x80_syscall+0x20 --- syscall (202, FreeBSD ELF32, __sysctl), eip = 0x2815b1ff, esp = 0xbfbfdbac, ebp = 0xbfbfdbd8 --- >Description: >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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