amd64/135124: lor vfs_bio/ufs_dirhash
John Baldwin
jhb at freebsd.org
Mon Jun 1 14:26:22 UTC 2009
On Sunday 31 May 2009 8:14:22 pm Randy Bush wrote:
>
> >Number: 135124
> >Category: amd64
> >Synopsis: lor vfs_bio/ufs_dirhash
> >Confidential: no
> >Severity: non-critical
> >Priority: medium
> >Responsible: freebsd-amd64
> >State: open
> >Quarter:
> >Keywords:
> >Date-Required:
> >Class: sw-bug
> >Submitter-Id: current-users
> >Arrival-Date: Mon Jun 01 00:20:00 UTC 2009
> >Closed-Date:
> >Last-Modified:
> >Originator: Randy Bush
> >Release: 8-CURRENT Sun May 31 22:52:41 UTC 2009
> >Organization:
> Internet Initiative Japan
> >Environment:
> FreeBSD work0.psg.com 8.0-CURRENT FreeBSD 8.0-CURRENT #3: Sun May 31
22:52:41 UTC 2009 root at work0.psg.com:/usr/obj/usr/src/sys/WORK0 amd64
> >Description:
> lock order reversal:
> 1st 0xffffff8052aba050 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2556
> 2nd 0xffffff0004f53000 dirhash (dirhash)
@ /usr/src/sys/ufs/ufs/ufs_dirhash.c:275
> 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
> _sx_xlock() at _sx_xlock+0x55
> ufsdirhash_acquire() at ufsdirhash_acquire+0x33
> ufsdirhash_add() at ufsdirhash_add+0x19
> ufs_direnter() at ufs_direnter+0x88b
> ufs_makeinode() at ufs_makeinode+0x31c
> VOP_CREATE_APV() at VOP_CREATE_APV+0xb1
> vn_open_cred() at vn_open_cred+0x3fd
> kern_openat() at kern_openat+0x159
> syscall() at syscall+0x1dd
> Xfast_syscall() at Xfast_syscall+0xd0
> --- syscall (5, FreeBSD ELF64, open), rip = 0x800c0bfcc, rsp =
0x7fffffffe6f8, rbp = 0x7fffffffe860 ---
>
> i think this may be different than 261
> <http://sources.zabbadoz.net/freebsd/lor/261.html>
It is not, it is the same exact LOR.
--
John Baldwin
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