Date: Sun, 10 Jun 2001 23:04:24 +0200 From: Jens Trzaska <j_trzaska@gmx.net> To: freebsd-stable@freebsd.org Subject: fatal trap 12 while copying files from a currupt filesystem? Message-ID: <3B23E0D8.CAEE1FC4@gmx.net>
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Hi!
My system has a fatal trap 12 during copying files from one filesystem
to another.
The story:
- crashed filesystem during heavy load with ide write cashe enabled
- to many errors after fsck...newfs
newfs -v -b 32768 -f 4096 -i 20000 -c 50 /dev/vinum/dhea-stripe
- filesystem restored (tape)
The result was a corrupted filesystem. Don't really know why but
that is not the problem at this point. I didn't know it at this
point. That may happen. :(
First crash happened during dumping the filesystem. The percent
counter ran over 100% -> panic.
After looking on the files I found some 0-bytes-files and
decided that the filesystem must be corrupt. Copying the whole
file-structure with tar from this filesystem to another also
results in a panic.
A corrupt filesystem may happen but it should not panic the system.
There are no hints about the problem in the logfiles. So how could
i find the error? Finding the 0-byte-files was really luck. fsck
runs over the filesystem and says that it is fine.
It may log read-errors or something like that. But panic? I think
that is a bit to heavy. *g*
The system is 4.3-stable cvsupped around 2 weeks ago. If you need any
more information let me know.
Jens Trzaska
--
(kgdb) symbol-file kernel.debug
Reading symbols from kernel.debug...done.
(kgdb) exec-file /var/crash/kernel.1
(kgdb) core-file /var/crash/vmcore.1
SMP 2 cpus
IdlePTD 3489792
initial pcb at 2c6800
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
mp_lock = 01000002; cpuid = 1; lapic.id = 01000000
fault virtual address = 0x1c
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc165b579
stack pointer = 0x10:0xd5fe0c8c
frame pointer = 0x10:0xd5fe0c98
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 14416 (tar)
interrupt mask = none <- SMP: XXX
trap number = 12
panic: page fault
mp_lock = 01000002; cpuid = 1; lapic.id = 01000000
boot() called on cpu#1
syncing disks... 170 134 67 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
giving up on 1 buffers
Uptime: 3h3m27s
dumping to dev #da/0x20001, offset 1048704
dump 511 510 509 508 507 506 505 504 503 502 501 500 499 498 497 496
495 494 493 492 491 490 489 488 487 486 485 484 483 482 481 480 479 478
477 476 475 474 473 472 471 470 469 468 467 466 465 464 463 462 461 460
459 458 457 456 455 454 453 452 451 450 449 448 447 446 445 444 443 442
441 440 439 438 437 436 435 434 433 432 431 430 429 428 427 426 425 424
423 422 421 420 419 418 417 416 415 414 413 412 411 410 409 408 407 406
405 404 403 402 401 400 399 398 397 396 395 394 393 392 391 390 389 388
387 386 385 384 383 382 381 380 379 378 377 376 375 374 373 372 371 370
369 368 367 366 365 364 363 362 361 360 359 358 357 356 355 354 353 352
351 350 349 348 347 346 345 344 343 342 341 340 339 338 337 336 335 334
333 332 331 330 329 328 327 326 325 324 323 322 321 320 319 318 317 316
315 314 313 312 311 310 309 308 307 306 305 304 303 302 301 300 299 298
297 296 295 294 293 292 291 290 289 288 287 286 285 284 283 282 281 280
279 278 277 276 275 274 273 272 271 270 269 268 267 266 265 264 263 262
261 260 259 258 257 256 255 254 253 252 251 250 249 248 247 246 245 244
243 242 241 240 239 238 237 236 235 234 233 232 231 230 229 228 227 226
225 224 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 208
207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190
189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172
171 170 169 168 167 166 165 164 163 162 161 160 159 158 157 156 155 154
153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136
135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118
117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100
99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28
27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
0
---
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:469
469 if (dumping++) {
(kgdb) where
#0 dumpsys () at /usr/src/sys/kern/kern_shutdown.c:469
#1 0xc01604bb in boot (howto=256) at
/usr/src/sys/kern/kern_shutdown.c:309
#2 0xc016086c in poweroff_wait (junk=0xc0299b8f, howto=-706226144) at
/usr/src/sys/kern/kern_shutdown.c:556
#3 0xc025ddd3 in trap_fatal (frame=0xd5fe0c4c, eva=28) at
/usr/src/sys/i386/i386/trap.c:951
#4 0xc025da69 in trap_pfault (frame=0xd5fe0c4c, usermode=0, eva=28) at
/usr/src/sys/i386/i386/trap.c:844
#5 0xc025d603 in trap (frame={tf_fs = 24, tf_es = -704774128, tf_ds =
-1050345456, tf_edi = 396, tf_esi = -1033618496, tf_ebp = -704770920,
tf_isp = -704770952, tf_ebx = 0,
tf_edx = 23518, tf_ecx = -1069469696, tf_eax = 0, tf_trapno = 12,
tf_err = 2, tf_eip = -1050299015, tf_cs = 8, tf_eflags = 66118, tf_esp =
768, tf_ss = -1049552896})
at /usr/src/sys/i386/i386/trap.c:443
#6 0xc165b579 in ?? ()
#7 0xc165ab26 in ?? ()
#8 0xc165addf in ?? ()
#9 0xc165a4d3 in ?? ()
#10 0xc165a3da in ?? ()
#11 0xc01982dc in spec_strategy (ap=0xd5fe0d8c) at
/usr/src/sys/miscfs/specfs/spec_vnops.c:479
#12 0xc0197d09 in spec_vnoperate (ap=0xd5fe0d8c) at
/usr/src/sys/miscfs/specfs/spec_vnops.c:119
#13 0xc0218de5 in ufs_vnoperatespec (ap=0xd5fe0d8c) at
/usr/src/sys/ufs/ufs/ufs_vnops.c:2391
#14 0xc0218689 in ufs_strategy (ap=0xd5fe0dcc) at vnode_if.h:944
#15 0xc0218db5 in ufs_vnoperate (ap=0xd5fe0dcc) at
/usr/src/sys/ufs/ufs/ufs_vnops.c:2373
#16 0xc01848ec in bread (vp=0xd6728ec0, blkno=0, size=32768, cred=0x0,
bpp=0xd5fe0e40) at vnode_if.h:944
#17 0xc02110fc in ffs_read (ap=0xd5fe0e64) at
/usr/src/sys/ufs/ufs/ufs_readwrite.c:273
#18 0xc01940b8 in vn_read (fp=0xc17b23c0, uio=0xd5fe0ed4,
cred=0xc1b74d80, flags=0, p=0xd5e7d820) at vnode_if.h:334
#19 0xc016e528 in dofileread (p=0xd5e7d820, fp=0xc17b23c0, fd=11,
buf=0x8096000, nbyte=2048, offset=-1, flags=0) at
/usr/src/sys/sys/file.h:147
#20 0xc016e3ee in read (p=0xd5e7d820, uap=0xd5fe0f80) at
/usr/src/sys/kern/sys_generic.c:117
#21 0xc025e0fd in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds =
-1078001617, tf_edi = 0, tf_esi = 2048, tf_ebp = -1077939752, tf_isp =
-704770092, tf_ebx = 134832128,
tf_edx = 134831616, tf_ecx = 0, tf_eax = 3, tf_trapno = 7, tf_err = 2,
tf_eip = 134719572, tf_cs = 31, tf_eflags = 647, tf_esp = -1077939892,
tf_ss = 47})
at /usr/src/sys/i386/i386/trap.c:1150
#22 0xc024c03b in Xint0x80_syscall ()
cannot read proc at 0
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