panic: page fault
Simon 'corecode' Schubert
corecode at fs.ei.tum.de
Wed Jun 29 12:04:48 PDT 2005
hey,
just had a panic on a very busy (cpuhog) system, supposedly at the moment
i ran `top'.
kernel+core in leaf:~corecode/dumps
% gdb -k kernel.25 vmcore.25
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panic: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xd220fc30
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc026e841
stack pointer = 0x10:0xd1a9d604
frame pointer = 0x10:0xd1a9d608
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 = 72115 (top)
current thread = pri 6
trap number = 12
panic: page fault
syncing disks... 7 2 2 2 2 2 2 2
done
Uptime: 4d4h37m43s
vn: cdevsw removed
dumping to dev #ad/0x20001, offset 1261696
dump ata0: resetting devices .. ata0: mask=03 ostat0=50 ostat2=00
ad0: ATAPI 00 00
ata0-slave: ATAPI 00 00
ata0: mask=03 stat0=50 stat1=00
ad0: ATA 01 a5
ata0: devices=01
ad0: success setting PIO4 on generic chip
done
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 [CTRL-C to abort] [CTRL-C to abort] [CTRL-C to abort] 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/.build/src/sys/kern/kern_shutdown.c:508
508 if (dumping++) {
dumpsys () at /usr/.build/src/sys/kern/kern_shutdown.c:508
508 if (dumping++) {
(kgdb) bt
#0 dumpsys () at /usr/.build/src/sys/kern/kern_shutdown.c:508
#1 0xc0184d38 in boot (howto=256) at /usr/.build/src/sys/kern/kern_shutdown.c:341
#2 0xc0185215 in panic (fmt=0xc02c3cb5 "%s") at /usr/.build/src/sys/kern/kern_shutdown.c:620
#3 0xc029decf in trap_fatal (frame=0xd1a9d5c4, eva=0) at /usr/.build/src/sys/i386/i386/trap.c:1122
#4 0xc029db63 in trap_pfault (frame=0xd1a9d5c4, usermode=0, eva=3525377072)
at /usr/.build/src/sys/i386/i386/trap.c:1022
#5 0xc029d7a6 in trap (frame=
{tf_fs = 24, tf_es = 16, tf_ds = 16, tf_edi = -777398724, tf_esi = -771229440, tf_ebp = -777398776, tf_isp = -777398800, tf_ebx = -777397680, tf_edx = -769590224, tf_ecx = 7, tf_eax = -777397680, tf_trapno = 12, tf_err = 0, tf_eip = -1071191999, tf_cs = 8, tf_eflags = 66050, tf_esp = -777398340, tf_ss = -777398744}) at /usr/.build/src/sys/i386/i386/trap.c:602
#6 0xc028d58f in calltrap () at /usr/.build/src/sys/i386/i386/exception.s:776
#7 0x00000018 in ?? ()
#8 0x00000010 in ?? ()
#9 0x00000010 in ?? ()
#10 0xd1a9d63c in ?? ()
#11 0xd207f900 in ?? ()
#12 0xd1a9d608 in ?? ()
#13 0xd1a9d5f0 in ?? ()
#14 0xd1a9da50 in ?? ()
#15 0xd220fc30 in ?? ()
#16 0x00000007 in ?? ()
#17 0xd1a9da50 in ?? ()
#18 0x0000000c in ?? ()
#19 0x00000000 in ?? ()
can not access 0xd220fc30, invalid address (d220fc30)
can not access 0xd220fc30, invalid address (d220fc30)
can not access 0xd220fc30, invalid address (d220fc30)
can not access 0xd220fc30, invalid address (d220fc30)
can not access 0xd220fc30, invalid address (d220fc30)
can not access 0xd220fc30, invalid address (d220fc30)
#20 0xc026e841 in strncpy (dst=0xd1a9da50 "", src=0xd220fc30 <Address 0xd220fc30 out of bounds>,
n=0) at /usr/.build/src/sys/libkern/strncpy.c:51
#21 0xc017eefe in fill_eproc_td (td=0xd207f900, ep=0xd1a9d7bc, xp=0xd1a9d63c)
at /usr/.build/src/sys/kern/kern_proc.c:389
#22 0xc017f212 in sysctl_out_proc (p=0x0, td=0xd207f900, req=0xd1a9db24, doingzomb=2)
at /usr/.build/src/sys/kern/kern_proc.c:495
#23 0xc017f5d5 in sysctl_kern_proc (oidp=0xc02fcb60, arg1=0x0, arg2=0, req=0xd1a9db24)
at /usr/.build/src/sys/kern/kern_proc.c:645
#24 0xc019076c in sysctl_root (oidp=0x0, arg1=0xd1a9dbbc, arg2=3, req=0xd1a9db24)
at /usr/.build/src/sys/kern/kern_sysctl.c:1193
#25 0xc01909a0 in userland_sysctl (name=0xd1a9dbbc, namelen=3, old=0x0, oldlenp=0xbfbff5ec,
inkernel=0, new=0x0, newlen=0, retval=0xd1a9dbb8)
at /usr/.build/src/sys/kern/kern_sysctl.c:1268
#26 0xc0190815 in __sysctl (uap=0xd1a9dc24) at /usr/.build/src/sys/kern/kern_sysctl.c:1211
#27 0xc029e24d in syscall2 (frame=
{tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = -1077938708, tf_esi = -1077938656, tf_ebp = -1077938776, tf_isp = -777396876, tf_ebx = 672693360, tf_edx = 0, tf_ecx = 0, tf_eax = 202, tf_trapno = 22, tf_err = 2, tf_eip = 672331688, tf_cs = 31, tf_eflags = 663, tf_esp = -1077938820, tf_ss = 47})
at /usr/.build/src/sys/i386/i386/trap.c:1328
#28 0xc028d61a in Xint0x80_syscall () at /usr/.build/src/sys/i386/i386/exception.s:854
#29 0x0000002f in ?? ()
#30 0x0000002f in ?? ()
#31 0x0000002f in ?? ()
#32 0xbfbff5ec in ?? ()
---Type <return> to continue, or q <return> to quit---q
Quit
(kgdb)
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