Date: Fri, 26 Apr 1996 14:51:39 -0400 (EDT) From: "Marc G. Fournier" <scrappy@ki.net> To: stable@freebsd.org Subject: bad dir panic Message-ID: <Pine.NEB.3.93.960426142856.10041A-100000@freebsd.ki.net>
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Hi...
On a different machine then the usual panics, I yesterday
totally blew up the machine, and am wondering if this is a hardware
issue (like the other machine), or possibly a software one.
The machine is a DX33 w/ 8Meg of RAM, and I tried to do a
make world to bring it up to date with stable.
Before the panic, I got:
free inode /usr/obj/29376 had 2013265776 blocks
flash on the screen, and then several minutes later it panic'd
with:
/usr: bad dir ino 11725 at offset 12: mangled entry
panic: bad dir
Stopped at +0x2b: movb $0,_in_Debugger.110
If you get this far and feel its a hardware problem, then
don't read any further (but do send me a quick email telling me so?),
as its just more details from what I could dig out of a core dump and a
DDB trace...the corruption that this caused was so extensive that I had to
effectively rebuild my /etc directory...
Trace showed:
() at +0x2b
_panic+0x3b
_ufs_dirbad+0x37
_ufs_lookup+0x4f5
_lookup+0x2c5
_namei+0xfd
_vn_open+0x183
_open+0x97
_syscall+0xf3
_Xsyscall+0x2b
--- syscall 5, eip = 0x8070d15, ebp = 0xefbfcb68
Dmesg of the system:
FreeBSD 2.1-STABLE #0: Fri Apr 26 00:14:42 EDT 1996
scrappy@ki.net:/usr/src/sys/compile/thrawn
CPU: i486DX (486-class CPU)
real memory = 8388608 (8192K bytes)
avail memory = 6717440 (6560K bytes)
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
aic0 at 0x340-0x35f irq 11 on isa
aic0 waiting for scsi devices to settle
(aic0:0:0): "CONNER CFA540S 13B0" type 0 fixed SCSI 2
sd0(aic0:0:0): Direct-Access 515MB (1056708 512 byte sectors)
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 765
fd0: 1.44MB 3.5in
1 3C5x9 board(s) on ISA found at 0x300
ep0 at 0x300-0x30f irq 10 on isa
ep0: aui/bnc[*BNC*] address 00:a0:24:0a:5a:fenpx0 on motherboard
npx0: INT 16 interface
Bits of a gdb of the core dump follow:
panic: bad dir
#0 boot (howto=260) at ../../i386/i386/machdep.c:911
911 dumppcb.pcb_ptd = rcr3();
(kgdb) where
#0 boot (howto=260) at ../../i386/i386/machdep.c:911
#1 0xf0111225 in panic (fmt=0xf0101258 "from debugger")
at ../../kern/subr_prf.c:116
#2 0xf0101275 in db_panic (dummy1=-266858973, dummy2=0, dummy3=-1,
dummy4=0xefbffb40 "") at ../../ddb/db_command.c:397
#3 0xf010115e in db_command (last_cmdp=0xf01a0af4, cmd_table=0xf01a0954)
at ../../ddb/db_command.c:281
#4 0xf01012dd in db_command_loop () at ../../ddb/db_command.c:419
#5 0xf0103c78 in db_trap (type=3, code=0) at ../../ddb/db_trap.c:72
#6 0xf0180bfa in kdb_trap (type=3, code=0, regs=0xefbffc30)
at ../../i386/i386/db_interface.c:120
#7 0xf01883b0 in trap (frame={tf_es = 16, tf_ds = -262602736,
tf_edi = -262542592, tf_esi = 8191, tf_ebp = -272630668,
tf_isp = -272630696, tf_ebx = 256, tf_edx = -266859019, tf_ecx = 2000,
tf_eax = -1, tf_trapno = 3, tf_err = 0, tf_eip = -266858973,
tf_cs = -272695288, tf_eflags = 582, tf_esp = -266859035,
tf_ss = -267316773}) at ../../i386/i386/trap.c:388
#8 0xf0181461 in calltrap ()
#9 0xf011121f in panic (fmt=0xf016b82d "bad dir") at ../../kern/subr_prf.c:114
#10 0xf016b86f in ufs_dirbad (ip=0xf059eb00, offset=12,
how=0xf016ab80 "mangled entry") at ../../ufs/ufs/ufs_lookup.c:590
#11 0xf016b095 in ufs_lookup (ap=0xefbffd88) at ../../ufs/ufs/ufs_lookup.c:285
#12 0xf0125f1d in lookup (ndp=0xefbffefc) at ./vnode_if.h:27
#13 0xf0125a6d in namei (ndp=0xefbffefc) at ../../kern/vfs_lookup.c:147
#14 0xf012b323 in vn_open (ndp=0xefbffefc, fmode=5, cmode=1445)
at ../../kern/vfs_vnops.c:113
#15 0xf0128a9f in open (p=0xf0591200, uap=0xefbfff94, retval=0xefbfff8c)
at ../../kern/vfs_syscalls.c:646
#16 0xf0188dbb in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 87960,
tf_esi = -272640916, tf_ebp = -272643224, tf_isp = -272629788,
tf_ebx = 134766688, tf_edx = 0, tf_ecx = 46, tf_eax = 5,
tf_trapno = 534, tf_err = 534, tf_eip = 134679829, tf_cs = 31,
tf_eflags = 534, tf_esp = -272643348, tf_ss = 39})
at ../../i386/i386/trap.c:906
#17 0xf01814ab in Xsyscall ()
#18 0x534b in ?? ()
#19 0xcb14 in ?? ()
#20 0x94ea in ?? ()
#21 0x10d3 in ?? ()
(kgdb) up 10
#10 0xf016b86f in ufs_dirbad (ip=0xf059eb00, offset=12,
how=0xf016ab80 "mangled entry") at ../../ufs/ufs/ufs_lookup.c:590
590 panic("bad dir");
(kgdb) list
585
586 mp = ITOV(ip)->v_mount;
587 (void)printf("%s: bad dir ino %ld at offset %ld: %s\n",
588 mp->mnt_stat.f_mntonname, ip->i_number, offset, how);
589 if ((mp->mnt_stat.f_flags & MNT_RDONLY) == 0)
590 panic("bad dir");
591 }
592
593 /*
594 * Do consistency checking on a directory entry:
(kgdb) print mp->mnt_stat.f_flags
$1 = 4096
(kgdb) up
#11 0xf016b095 in ufs_lookup (ap=0xefbffd88) at ../../ufs/ufs/ufs_lookup.c:285
285 ufs_dirbad(dp, dp->i_offset, "mangled entry");
(kgdb) list
280 ep = (struct direct *)((char *)bp->b_data + entryoffsetinblock);
281 if (ep->d_reclen == 0 ||
282 (dirchk && ufs_dirbadentry(vdp, ep, entryoffsetinblock))) {
283 int i;
284
285 ufs_dirbad(dp, dp->i_offset, "mangled entry");
286 i = DIRBLKSIZ - (entryoffsetinblock & (DIRBLKSIZ - 1));
287 dp->i_offset += i;
288 entryoffsetinblock += i;
289 continue;
(kgdb) quit
ki#
Marc G. Fournier scrappy@ki.net
Systems Administrator @ ki.net scrappy@freebsd.org
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