Date: Tue, 08 Apr 2008 23:51:02 +0200 From: raoul megelas <rmgls@free.fr> To: FreeBSD-gnats-submit@FreeBSD.org Subject: i386/122588: 4 Lock Order Reversal Message-ID: <20080408215104.8600F1AB2CE@smtp1-g19.free.fr> Resent-Message-ID: <200804082210.m38MA09s044174@freefall.freebsd.org>
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Note: There was a bad value `as' for the field `>Priority:'. It was set to the default value of `medium'. Note: There was a bad value `kernel' for the field `>Class:'. It was set to the default value of `sw-bug'. >Number: 122588 >Category: i386 >Synopsis: 4 Lock Order Reversal >Confidential: yes >Severity: non-critical >Priority: medium >Responsible: freebsd-i386 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Apr 08 22:10:00 UTC 2008 >Closed-Date: >Last-Modified: >Originator: raoul megelas >Release: FreeBSD 8.0-CURRENT i386 #5 2008-04-02 >Organization: >Environment: >Description: Hi, I found some LOR looking at my dmesg. the system: a Sony s5 laptop (intel 770 at 2 ghz); 1G ram running current dated from: 2008 April 2. If these LOR are well known, please simply forget this message. lock order reversal: 1st 0xc496ce08 devfs (devfs) @ /usr/src/sys/kern/vfs_subr.c:2045 2nd 0xc4ad0614 devfsmount (devfsmount) @ /usr/src/sys/fs/devfs/devfs_vnops.c:201 KDB: stack backtrace: db_trace_self_wrapper(c0b0fe6d,e2f95bbc,c07add7e,c0b1235f,c4ad0614,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c0b1235f,c4ad0614,c0b03801,c0b03801,c0b03842,...) at kdb_backtrace+0x29 witness_checkorder(c4ad0614,9,c0b03842,c9,c7,...) at witness_checkorder+0x6de _sx_xlock(c4ad0614,0,c0b03842,c9,c4ad0614,...) at _sx_xlock+0x7d devfs_allocv(c4b0ec00,c4b26000,e2f95c28,c4627cc0,c0b180c1,...) at devfs_allocv+0x144 devfs_root(c4b26000,2,c0c83018,c4627cc0,ca,...) at devfs_root+0x51 set_rootvnode(c0c83000,0,c0b180c1,5f5,c07eb350,...) at set_rootvnode+0x2b vfs_mountroot(c0c30730,4,c0b07c9a,264,ffd7ff9d,...) at vfs_mountroot+0x356 start_init(0,e2f95d38,c0b0960f,30d,c4625cf8,...) at start_init+0x65 fork_exit(c073b5f0,0,e2f95d38) at fork_exit+0xb8 fork_trampoline() at fork_trampoline+0x8 --- trap 0, eip = 0, esp = 0xe2f95d70, ebp = 0 --- Trying to mount root from ufs:/dev/ad4s4a lock order reversal: 1st 0xc496c978 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2045 2nd 0xc4b26000 vfslock (vfslock) @ /usr/src/sys/kern/vfs_subr.c:364 KDB: stack backtrace: db_trace_self_wrapper(c0b0fe6d,e2f959b4,c07add7e,c0b1235f,c4b26000,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c0b1235f,c4b26000,c0b181bf,c0b181bf,c0b1875c,...) at kdb_backtrace+0x29 witness_checkorder(c4b26000,1,c0b1875c,16c,e2f959f4,...) at witness_checkorder+0x6de _lockmgr_args(c4b26000,20001,c4b26030,0,ffffffff,...) at _lockmgr_args+0x1d5 vfs_busy(c4b26000,0,0,c4627cc0,e2f95b3c,...) at vfs_busy+0x1b0 lookup(e2f95b24,c0b17e6f,d8,c0,c461132c,...) at lookup+0x7bf namei(e2f95b24,e2f95b28,c07ad55c,e2f95b30,c0c828a8,...) at namei+0x44b kern_unlinkat(c4627cc0,ffffff9c,c0b184fe,1,e2f95c5c,...) at kern_unlinkat+0x46 kern_unlink(c4627cc0,c0b184fe,1,630,0,...) at kern_unlink+0x27 vfs_mountroot_try(c0b186b8,c0b069cb,c0aff32c,1,c07eb350,...) at vfs_mountroot_try+0x476 vfs_mountroot(c0c30730,4,c0b07c9a,264,ffd7ff9d,...) at vfs_mountroot+0x418 start_init(0,e2f95d38,c0b0960f,30d,c4625cf8,...) at start_init+0x65 fork_exit(c073b5f0,0,e2f95d38) at fork_exit+0xb8 fork_trampoline() at fork_trampoline+0x8 --- trap 0, eip = 0, esp = 0xe2f95d70, ebp = 0 --- start_init: trying /sbin/init lock order reversal: 1st 0xc462b044 user map (user map) @ /usr/src/sys/vm/vm_map.c:3111 2nd 0xc496c730 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2045 KDB: stack backtrace: db_trace_self_wrapper(c0b0fe6d,e2f959e0,c07add7e,c0b1235f,c496c730,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c0b1235f,c496c730,c0b0727e,c0b0727e,c0b1875c,...) at kdb_backtrace+0x29 witness_checkorder(c496c730,1,c0b1875c,7fd,c0b307d9,...) at witness_checkorder+0x6de _lockmgr_args(c496c730,30041,c496c760,0,ffffffff,...) at _lockmgr_args+0x1d5 ffs_lock(e2f95a88,c0b32281,c0b069c9,30041,c496c6d8,...) at ffs_lock+0x72 VOP_LOCK1_APV(c0be6ba0,e2f95a88,c0bff060,c496c6d8,30041,...) at VOP_LOCK1_APV+0xa5 _vn_lock(c496c6d8,30041,c0b1875c,7fd,c0b0bba3,...) at _vn_lock+0x5b vget(c496c6d8,30041,c4627cc0,4a9,c1c5f180,...) at vget+0xa1 vnode_pager_lock(c1c5f200,0,c0b2f8d7,127,e2f95be8,...) at vnode_pager_lock+0x1ad vm_fault(c462b000,80d3000,2,8,80d3000,...) at vm_fault+0x1df trap_pfault(5,0,c0b3e3ed,2c4,c4625cf8,...) at trap_pfault+0x118 trap(e2f95d38) at trap+0x259 calltrap() at calltrap+0x6 --- trap 0xc, eip = 0x80480e5, esp = 0xbfbfeef0, ebp = 0xbfbfef10 --- WARNING: attempt to net_add_domain(bluetooth) after domainfinalize() WARNING: attempt to net_add_domain(netgraph) after domainfinalize() lock order reversal: 1st 0xc4ba7978 pseudofs (pseudofs) @ /usr/src/sys/kern/vfs_subr.c:2045 2nd 0xc4b25a70 vfslock (vfslock) @ /usr/src/sys/kern/vfs_subr.c:364 KDB: stack backtrace: db_trace_self_wrapper(c0b0fe6d,e6ee3a14,c07add7e,c0b1235f,c4b25a70,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c0b1235f,c4b25a70,c0b181bf,c0b181bf,c0b1875c,...) at kdb_backtrace+0x29 witness_checkorder(c4b25a70,1,c0b1875c,16c,e6ee3a54,...) at witness_checkorder+0x6de _lockmgr_args(c4b25a70,20001,c4b25aa0,0,ffffffff,...) at _lockmgr_args+0x1d5 vfs_busy(c4b25a70,10,0,c4b74aa0,0,...) at vfs_busy+0x1b0 vfs_donmount(810e080,c,e6ee3c70,c4c1f180,810b530,...) at vfs_donmount+0xdbc nmount(c4b74aa0,e6ee3cfc,c,c0b12fc9,c0bc7630,...) at nmount+0xb2 syscall(e6ee3d38) at syscall+0x2a3 Xint0x80_syscall() at Xint0x80_syscall+0x20 --- syscall (378, FreeBSD ELF32, nmount), eip = 0x280d727b, esp = 0xbfbfe96c, ebp = 0xbfbfedb8 --- best regards raoul rmgls@free.fr >How-To-Repeat: simply booting the machine, all the time. >Fix: >Release-Note: >Audit-Trail: >Unformatted: >machine see below
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