From owner-freebsd-stable@FreeBSD.ORG Thu Nov 20 06:50:51 2008 Return-Path: Delivered-To: freebsd-stable@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 75DA01065677 for ; Thu, 20 Nov 2008 06:50:51 +0000 (UTC) (envelope-from ganbold@micom.mng.net) Received: from publicd.ub.mng.net (publicd.ub.mng.net [202.179.0.88]) by mx1.freebsd.org (Postfix) with ESMTP id 949768FC0A for ; Thu, 20 Nov 2008 06:50:50 +0000 (UTC) (envelope-from ganbold@micom.mng.net) Received: from [202.179.0.164] (helo=daemon.micom.mng.net) by publicd.ub.mng.net with esmtpa (Exim 4.69 (FreeBSD)) (envelope-from ) id 1L33NG-000H9L-SA; Thu, 20 Nov 2008 14:50:46 +0800 Message-ID: <492508C6.3090005@micom.mng.net> Date: Thu, 20 Nov 2008 14:50:46 +0800 From: Ganbold User-Agent: Thunderbird 2.0.0.12 (X11/20080415) MIME-Version: 1.0 To: freebsd-stable@FreeBSD.ORG References: <4922906D.4060805@micom.mng.net> In-Reply-To: <4922906D.4060805@micom.mng.net> X-Enigmail-Version: 0.95.6 OpenPGP: id=78F6425E Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Kostik Belousov , kib@FreeBSD.org Subject: Re: shutdown -p now crashes X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Nov 2008 06:50:51 -0000 Ganbold wrote: > #3 0xc06ab8b3 in vput (vp=0xc3d11ac8) at > /usr/src/sys/kern/vfs_subr.c:2202 > #4 0xc06a69e6 in dounmount (mp=0xc3e59b30, flags=524288, > td=0xc3b31d20) at /usr/src/sys/kern/vfs_mount.c:1288 > #5 0xc06aa493 in vfs_unmountall () at /usr/src/sys/kern/vfs_subr.c:2939 > #6 0xc062b7f4 in boot (howto=16392) at > /usr/src/sys/kern/kern_shutdown.c:400 > #7 0xc062bc17 in reboot (td=0xc3b31d20, uap=0xeef55cfc) at > /usr/src/sys/kern/kern_shutdown.c:172 > #8 0xc08171f5 in syscall (frame=0xeef55d38) at > /usr/src/sys/i386/i386/trap.c:1090 > #9 0xc07fd710 in Xint0x80_syscall () at > /usr/src/sys/i386/i386/exception.s:255 > #10 0x00000033 in ?? () > (kgdb) > .. I was able to reproduce the panic. I plugged in external ZFS/GELI HDD via USB and used 'zpool import' to import disk and did some 'ls' and then used 'zpool export' to umount disk. Then I detached the disk from desktop and tried to "shutdown -p now". This way panic is reproduced 2 times. More info: daemon% uname -an FreeBSD daemon.micom.mng.net 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #8 r185085M: Thu Nov 20 12:50:33 ULAT 2008 tsgan@daemon.micom.mng.net:/usr/obj/usr/src/sys/GDAEMON i386 daemon% <118>. <118>Writing entropy file: <118>. <118>Terminated <118>. <118>Nov 20 14:30:12 daemon syslogd: exiting on signal 15 rootvp 0xc3d11ac8 v_usecount 2 KDB: stack backtrace: db_trace_self_wrapper(c086b1ee,f2c6bbac,c06abb23,c086faa8,c3d11ac8,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c086faa8,c3d11ac8,2,b,0,...) at kdb_backtrace+0x29 vrele(c3d11ac8,c3e6f690,0,0,0,...) at vrele+0x83 fdfree(c3e6f690,c3e8f000,48077bf0,f2c6bc80,c062ccfe,...) at fdfree+0x8b6 exit1(c3e6f690,0,f2c6bd2c,c0817245,c3e6f690,...) at exit1+0x5e9 sys_exit(c3e6f690,f2c6bcfc,4,c3e6f690,f2c6bd2c,...) at sys_exit+0x1d syscall(f2c6bd38) at syscall+0x335 Xint0x80_syscall() at Xint0x80_syscall+0x20 --- syscall (1, FreeBSD ELF32, sys_exit), eip = 0x4810ed2f, esp = 0xbfbfe6bc, ebp = 0xbfbfe6c8 --- rootvp 0xc3d11ac8 v_usecount 1 KDB: stack backtrace: db_trace_self_wrapper(c086b1ee,f2c6bbac,c06abb23,c086faa8,c3d11ac8,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c086faa8,c3d11ac8,1,b,0,...) at kdb_backtrace+0x29 vrele(c3d11ac8,c3e6f690,0,0,0,...) at vrele+0x83 fdfree(c3e6f690,c3e8f000,48077bf0,f2c6bc80,c062ccfe,...) at fdfree+0x8c3 exit1(c3e6f690,0,f2c6bd2c,c0817245,c3e6f690,...) at exit1+0x5e9 sys_exit(c3e6f690,f2c6bcfc,4,c3e6f690,f2c6bd2c,...) at sys_exit+0x1d syscall(f2c6bd38) at syscall+0x335 Xint0x80_syscall() at Xint0x80_syscall+0x20 --- syscall (1, FreeBSD ELF32, sys_exit), eip = 0x4810ed2f, esp = 0xbfbfe6bc, ebp = 0xbfbfe6c8 --- Waiting (max 60 seconds) for system process `vnlru' to stop...done Waiting (max 60 seconds) for system process `bufdaemon' to stop...done Waiting (max 60 seconds) for system process `syncer' to stop... Syncing disks, vnodes remaining...2 1 0 0 done All buffers synced. rootvp 0xc3d11ac8 v_usecount 1 KDB: stack backtrace: db_trace_self_wrapper(c086b1ee,eef55ba8,c06abb23,c086faa8,c3d11ac8,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c086faa8,c3d11ac8,1,c3b31d20,eef55ba8,...) at kdb_backtrace+0x29 vrele(c3d11ac8,2,eef55bf0,c3b31d20,0,...) at vrele+0x83 dounmount(c3e56b30,80000,c3b31d20,e3b61aec,0,...) at dounmount+0x491 vfs_unmountall(c0869007,0,c086906b,117,eef55c50,...) at vfs_unmountall+0x33 boot(c3b31d20,8,0,fffffffe,c3b31d20,...) at boot+0x444 reboot(c3b31d20,eef55cfc,4,8048290,9e7c9054,...) at reboot+0x67 syscall(eef55d38) at syscall+0x335 Xint0x80_syscall() at Xint0x80_syscall+0x20 --- syscall (55, FreeBSD ELF32, reboot), eip = 0x8050bb3, esp = 0xbfbfe8ec, ebp = 0xbfbfe9b8 --- panic: vput: negative ref cnt cpuid = 0 KDB: stack backtrace: db_trace_self_wrapper(c086b1ee,eef55b68,c062bd39,c08832ea,0,...) at db_trace_self_wrapper+0x26 kdb_backtrace(c08832ea,0,c086fac1,eef55b74,0,...) at kdb_backtrace+0x29 panic(c086fac1,eef55ba8,c06abcd0,c3d11ac8,eef55b90,...) at panic+0x119 vput(c3d11ac8,2,eef55bf0,c3b31d20,0,...) at vput+0xf3 dounmount(c3e56b30,80000,c3b31d20,e3b61aec,0,...) at dounmount+0x4a6 vfs_unmountall(c0869007,0,c086906b,117,eef55c50,...) at vfs_unmountall+0x33 boot(c3b31d20,8,0,fffffffe,c3b31d20,...) at boot+0x444 reboot(c3b31d20,eef55cfc,4,8048290,9e7c9054,...) at reboot+0x67 syscall(eef55d38) at syscall+0x335 Xint0x80_syscall() at Xint0x80_syscall+0x20 --- syscall (55, FreeBSD ELF32, reboot), eip = 0x8050bb3, esp = 0xbfbfe8ec, ebp = 0xbfbfe9b8 --- Uptime: 7m3s Physical memory: 1013 MB Dumping 54 MB: 39 23 7 (kgdb) where #0 doadump () at pcpu.h:196 #1 0xc062ba67 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418 #2 0xc062bd72 in panic (fmt=Variable "fmt" is not available. ) at /usr/src/sys/kern/kern_shutdown.c:574 #3 0xc06ab8e3 in vput (vp=0xc3d11ac8) at /usr/src/sys/kern/vfs_subr.c:2211 #4 0xc06a69e6 in dounmount (mp=0xc3e56b30, flags=524288, td=0xc3b31d20) at /usr/src/sys/kern/vfs_mount.c:1288 #5 0xc06aa493 in vfs_unmountall () at /usr/src/sys/kern/vfs_subr.c:2948 #6 0xc062b7f4 in boot (howto=16392) at /usr/src/sys/kern/kern_shutdown.c:400 #7 0xc062bc17 in reboot (td=0xc3b31d20, uap=0xeef55cfc) at /usr/src/sys/kern/kern_shutdown.c:172 #8 0xc0817245 in syscall (frame=0xeef55d38) at /usr/src/sys/i386/i386/trap.c:1090 #9 0xc07fd760 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:255 #10 0x00000033 in ?? () (kgdb) frame 4 #4 0xc06a69e6 in dounmount (mp=0xc3e56b30, flags=524288, td=0xc3b31d20) at /usr/src/sys/kern/vfs_mount.c:1288 1288 vput(fsrootvp); (kgdb) p *mp $1 = {mnt_lock = {lk_object = {lo_name = 0xc086f234 "vfslock", lo_type = 0xc086f234 "vfslock", lo_flags = 70844416, lo_witness_data = {lod_list = { stqe_next = 0x0}, lod_witness = 0x0}}, lk_interlock = 0xc0956fa8, lk_flags = 1310720, lk_sharecount = 0, lk_waitcount = 0, lk_exclusivecount = 1, lk_prio = 80, lk_timo = 0, lk_lockholder = 0xc3b31d20, lk_newlock = 0x0}, mnt_mtx = {lock_object = {lo_name = 0xc086f223 "struct mount mtx", lo_type = 0xc086f223 "struct mount mtx", lo_flags = 16973824, lo_witness_data = {lod_list = {stqe_next = 0x0}, lod_witness = 0x0}}, mtx_lock = 4, mtx_recurse = 0}, mnt_gen = 1, mnt_list = {tqe_next = 0x0, tqe_prev = 0xc091c224}, mnt_op = 0xc0926080, mnt_vfc = 0xc0926040, mnt_vnodecovered = 0x0, mnt_syncer = 0x0, mnt_ref = 736, mnt_nvnodelist = {tqh_first = 0xc3d11ac8, tqh_last = 0xc67fd350}, mnt_nvnodelistsize = 736, mnt_writeopcount = 1, mnt_kern_flag = 553648137, mnt_flag = 20480, mnt_noasync = 0, mnt_opt = 0xc3c4cc90, mnt_optnew = 0x0, mnt_maxsymlinklen = 120, mnt_stat = { f_version = 537068824, f_type = 1, f_flags = 20480, f_bsize = 2048, f_iosize = 16384, f_blocks = 2538519, f_bfree = 2339932, f_bavail = 2136851, f_files = 659454, f_ffree = 651413, f_syncwrites = 0, f_asyncwrites = 0, f_syncreads = 0, f_asyncreads = 0, f_spare = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, f_namemax = 255, f_owner = 0, f_fsid = {val = {1149777033, 1944990175}}, f_charspare = '\0' , f_fstypename = "ufs", '\0' , f_mntfromname = "/dev/ad4s1a", '\0' , f_mntonname = "/", '\0' }, mnt_cred = 0xc3e52700, mnt_data = 0xc3e52600, mnt_time = 1227162073, mnt_iosize_max = 131072, mnt_export = 0x0, mnt_label = 0x0, mnt_hashseed = 2358371174, mnt_markercnt = 0, mnt_holdcnt = 0, mnt_holdcntwaiters = 0, mnt_secondary_writes = 0, mnt_secondary_accwrites = 2874, mnt_gjprovider = 0x0, mnt_explock = {lk_object = {lo_name = 0xc086f23c "explock", lo_type = 0xc086f23c "explock", lo_flags = 70844416, lo_witness_data = { lod_list = {stqe_next = 0x0}, lod_witness = 0x0}}, lk_interlock = 0xc0956fc0, lk_flags = 0, lk_sharecount = 0, lk_waitcount = 0, lk_exclusivecount = 0, lk_prio = 80, lk_timo = 0, lk_lockholder = 0xffffffff, lk_newlock = 0x0}} (kgdb) p fsrootvp $2 = (struct vnode *) 0xc3d11ac8 (kgdb) p *fsrootvp $3 = {v_type = VDIR, v_tag = 0xc0864e51 "ufs", v_op = 0xc0926280, v_data = 0xc3e5d000, v_mount = 0xc3e56b30, v_nmntvnodes = {tqe_next = 0xc3d119b4, tqe_prev = 0xc3e56b98}, v_un = {vu_mount = 0x0, vu_socket = 0x0, vu_cdev = 0x0, vu_fifoinfo = 0x0, vu_yield = 0}, v_hashlist = {le_next = 0x0, le_prev = 0xc3d09da0}, v_hash = 2, v_cache_src = {lh_first = 0x0}, v_cache_dst = {tqh_first = 0x0, tqh_last = 0xc3d11af8}, v_dd = 0x0, v_cstart = 0, v_lasta = 0, v_lastw = 0, v_clen = 0, v_lock = {lk_object = {lo_name = 0xc0864e51 "ufs", lo_type = 0xc0864e51 "ufs", lo_flags = 70844416, lo_witness_data = {lod_list = {stqe_next = 0x0}, lod_witness = 0x0}}, lk_interlock = 0xc0956510, lk_flags = 262208, lk_sharecount = 0, lk_waitcount = 0, lk_exclusivecount = 1, lk_prio = 80, lk_timo = 51, lk_lockholder = 0xc3b31d20, lk_newlock = 0x0}, v_interlock = {lock_object = { lo_name = 0xc086fb51 "vnode interlock", lo_type = 0xc086fb51 "vnode interlock", lo_flags = 16973824, lo_witness_data = {lod_list = {stqe_next = 0x0}, lod_witness = 0x0}}, mtx_lock = 3283295520, mtx_recurse = 0}, v_vnlock = 0xc3d11b20, v_holdcnt = 2, v_usecount = 0, v_iflag = 0, v_vflag = 1, v_writecount = 0, v_freelist = {tqe_next = 0x0, tqe_prev = 0x0}, v_bufobj = {bo_mtx = 0xc3d11b50, bo_clean = {bv_hd = {tqh_first = 0xe3d02594, tqh_last = 0xe3d025cc}, bv_root = 0xe3d02594, bv_cnt = 1}, bo_dirty = {bv_hd = {tqh_first = 0x0, tqh_last = 0xc3d11b9c}, bv_root = 0x0, bv_cnt = 0}, bo_numoutput = 0, bo_flag = 0, bo_ops = 0xc091ae00, bo_bsize = 16384, bo_object = 0xc106183c, bo_synclist = {le_next = 0x0, le_prev = 0x0}, bo_private = 0xc3d11ac8, __bo_vnode = 0xc3d11ac8}, v_pollinfo = 0x0, v_label = 0x0, v_lockf = 0x0} (kgdb) p rootvnode $4 = (struct vnode *) 0x0 (kgdb) p *rootvnode Cannot access memory at address 0x0 (kgdb) -- They are called computers simply because computation is the only significant job that has so far been given to them.