Date: Sat, 7 Jan 2012 11:10:09 GMT From: Roar Pettersen <rope1968@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: i386/163885: lock order reversal Message-ID: <201201071110.q07BA9MX066885@red.freebsd.org> Resent-Message-ID: <201201071120.q07BK6sl023190@freefall.freebsd.org>
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>Number: 163885 >Category: i386 >Synopsis: lock order reversal >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-i386 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Jan 07 11:20:06 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Roar Pettersen >Release: 9.0-STABLE >Organization: >Environment: FreeBSD 9.0-STABLE FreeBSD 9.0-STABLE #0: Sat Jan 7 11:33:10 CET 2012 root@machine:/usr/obj/usr/src/sys/I386 i386 >Description: lock order reversal: 1st 0xddf0c8c8 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2658 2nd 0xc4cba000 dirhash (dirhash) @ /usr/src/sys/ufs/ufs/ufs_dirhash.c:284 KDB: stack backtrace: db_trace_self_wrapper(c0a1c0ac,7366752f,7366752f,7269645f,68736168,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c075847b,c0a1fa73,c45452a0,c4548f90,de2ad898,...) at kdb_backtrace+0x2a _witness_debugger(c0a1fa73,c4cba000,c0a45212,c4548f90,c0a44e97,...) at _witness_debugger+0x25 witness_checkorder(c4cba000,9,c0a44e97,11c,0,...) at witness_checkorder+0x839 _sx_xlock(c4cba000,0,c0a44e97,11c,c4cc9e80,...) at _sx_xlock+0x85 ufsdirhash_acquire(ddf0c868,c4cc9e80,de2ad9f4,deb48a70,de2ad968,...) at ufsdirhash_acquire+0x35 ufsdirhash_add(c4cc9e80,de2ad9f4,a70,de2ad954,de2ad958,...) at ufsdirhash_add+0x13 ufs_direnter(c4cc0cc0,c4cc0bb0,de2ad9f4,de2adb84,ddf0cc64,...) at ufs_direnter+0x739 ufs_mkdir(de2adc14,de2adc28,0,0,de2adbac,...) at ufs_mkdir+0x8ef VOP_MKDIR_APV(c0ab2ee0,de2adc14,de2adb84,de2adbac,0,...) at VOP_MKDIR_APV+0xa5 kern_mkdirat(c4cabb80,ffffff9c,28404020,0,1c0,...) at kern_mkdirat+0x2a1 kern_mkdir(c4cabb80,28404020,0,1c0,de2add1c,...) at kern_mkdir+0x2e sys_mkdir(c4cabb80,de2adcec,c0a58d56,c0a20682,202,...) at sys_mkdir+0x29 syscall(de2add28) at syscall+0x284 Xint0x80_syscall() at Xint0x80_syscall+0x21 --- syscall (136, FreeBSD ELF32, sys_mkdir), eip = 0x28172c93, esp = 0xbfbfe8cc, ebp = 0xbfbfed78 --- >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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