Date: Mon, 16 Sep 2013 04:10:02 GMT From: jb <jb.1234abcd@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/182139: lock order reversal Message-ID: <201309160410.r8G4A29S005719@oldred.freebsd.org> Resent-Message-ID: <201309160420.r8G4K0o1095066@freefall.freebsd.org>
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>Number: 182139 >Category: kern >Synopsis: lock order reversal >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Sep 16 04:20:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: jb >Release: FreeBSD 10.0-CURRENT #0 r255342 >Organization: >Environment: FreeBSD localhost.localdomain 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r255342: Sat Sep 7 09:10:09 UTC 2013 root@snap.freebsd.org:/usr/obj/usr/src/sys/GENERIC i386 >Description: $ dmesg .. Trying to mount root from ufs:/dev/ada0s2a [rw]... lock order reversal: 1st 0xc71a026c ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2099 2nd 0xe19a9be8 bufwait (bufwait) @ /usr/src/sys/ufs/ffs/ffs_vnops.c:262 3rd 0xc71845c0 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2099 KDB: stack backtrace: db_trace_self_wrapper(c117e5e0,3236323a,c117000a,528,700,...) at db_trace_self_wrapper+0x2d/frame 0xf08ba288 kdb_backtrace(c1182136,c71845c0,c11693c6,c69978e8,c118b751,...) at kdb_backtrace+0x30/frame 0xf08ba2f0 witness_checkorder(c71845c0,9,c118b751,833,c71845e0,...) at witness_checkorder+0xc8a/frame 0xf08ba340 __lockmgr_args(c71845c0,80100,c71845e0,0,0,...) at __lockmgr_args+0x83f/frame 0xf08ba418 ffs_lock(f08ba498,c69831e0,c69892f8,c69831e0,c69892f8,...) at ffs_lock+0x87/frame 0xf08ba454 VOP_LOCK1_APV(c12a6bac,f08ba498,0,c11888d2,c12baff8,...) at VOP_LOCK1_APV+0x104/frame 0xf08ba480 _vn_lock(c718458c,80100,c118b751,833,c118a9b9,...) at _vn_lock+0xa1/frame 0xf08ba4c0 vget(c718458c,80100,c711cc40,57,0,...) at vget+0x74/frame 0xf08ba4f8 vfs_hash_get(c718ad20,2739b,80000,c711cc40,f08ba5d8,...) at vfs_hash_get+0xfc/frame 0xf08ba524 ffs_vgetf(c718ad20,2739b,80000,f08ba5d8,1,...) at ffs_vgetf+0x47/frame 0xf08ba580 softdep_sync_buf(c71a0238,e19a9b90,1,0,0,...) at softdep_sync_buf+0x8ef/frame 0xf08ba5e8 ffs_syncvnode(c71a0238,1,0,c0b151e7,1,...) at ffs_syncvnode+0x287/frame 0xf08ba640 ffs_truncate(c71a0238,200,0,880,c6da7580,...) at ffs_truncate+0x6b9/frame 0xf08ba800 ufs_direnter(c71a0238,c718458c,f08ba8c0,f08babcc,0,...) at ufs_direnter+0x7ed/frame 0xf08ba880 ufs_makeinode(f08babb8,f08babcc) at ufs_makeinode+0x538/frame 0xf08ba9f8 ufs_create(f08baae0,610,c718ad30,2,2,...) at ufs_create+0x2f/frame 0xf08baa0c VOP_CREATE_APV(c12a6bac,f08baae0,f08babcc,f08baa70,c1aa0300,...) at VOP_CREATE_APV+0xfd/frame 0xf08baa38 vn_open_cred(f08bab70,f08babfc,180,0,c6da7580,c71eb690) at vn_open_cred+0x2e5/frame 0xf08bab08 vn_open(f08bab70,f08babfc,180,c71eb690,28823104,...) at vn_open+0x3b/frame 0xf08bab28 kern_openat(c711cc40,ffffff9c,28823104,0,100205,180) at kern_openat+0x315/frame 0xf08bac20 sys_open(c711cc40,f08bacc8,1245d62e,f08bac98,c0f546b0,...) at sys_open+0x38/frame 0xf08bac40 syscall(f08bad08) at syscall+0x2de/frame 0xf08bacfc Xint0x80_syscall() at Xint0x80_syscall+0x21/frame 0xf08bacfc --- syscall (5, FreeBSD ELF32, sys_open), eip = 0x2819d307, esp = 0xbfbfdc2c, ebp = 0xbfbfdd28 --- .. >How-To-Repeat: on every boot. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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