tags:

views:

103

answers:

2
#1089 0x9999992f in ?? ()
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#1103 0x666666a6 in ?? ()
---Type <return> to continue, or q <return> to quit---
#1104 0x31306666 in ?? ()
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---Type <return> to continue, or q <return> to quit---
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#1149 0x37333335 in ?? ()
---Type <return> to continue, or q <return> to quit---
#1150 0x34323539 in ?? ()
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---Type <return> to continue, or q <return> to quit---
#1173 0x31393731 in ?? ()
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#1192 0x32313039 in ?? ()
#1193 0x36353433 in ?? ()
#1194 0x30393837 in ?? ()
#1195 0x2f914031 in ?? ()
---Type <return> to continue, or q <return> to quit---
#1196 0x99999999 in ?? ()
#1197 0xa650409a in ?? ()
#1198 0x66666666 in ?? ()
#1199 0x32313066 in ?? ()
#1200 0x36353433 in ?? ()
#1201 0x30393837 in ?? ()
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#1217 0x36353433 in ?? ()
#1218 0x30393837 in ?? ()
---Type <return> to continue, or q <return> to quit---
#1219 0x31310131 in ?? ()
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#1238 0x34303231 in ?? ()
#1239 0x38303732 in ?? ()
#1240 0x32373132 in ?? ()
#1241 0x35363734 in ?? ()
---Type <return> to continue, or q <return> to quit---
#1242 0x33303032 in ?? ()
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#1264 0x31393938 in ?? ()
---Type <return> to continue, or q <return> to quit---
#1265 0x34373438 in ?? ()
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---Type <return> to continue, or q <return> to quit---
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#1310 0x31747361 in ?? ()
---Type <return> to continue, or q <return> to quit---
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#1333 0x34353730 in ?? ()
---Type <return> to continue, or q <return> to quit---
#1334 0x37363532 in ?? ()
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#1353 0x33383330 in ?? ()
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#1356 0x39373032 in ?? ()
---Type <return> to continue, or q <return> to quit---
#1357 0x38303031 in ?? ()
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#1379 0x7273752f in ?? ()
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#1380 0x6973702f in ?? ()
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#1387 0x4d564155 in ?? ()
#1388 0x4c45444f in ?? ()
#1389 0x7661753d in ?? ()
#1390 0x4e414c00 in ?? ()
#1391 0x6e653d47 in ?? ()
#1392 0x2e53555f in ?? ()
#1393 0x2d465455 in ?? ()
#1394 0x444b0038 in ?? ()
#1395 0x53495f45 in ?? ()
#1396 0x4552505f in ?? ()
#1397 0x4b4e494c in ?? ()
#1398 0x313d4445 in ?? ()
#1399 0x49535000 in ?? ()
#1400 0x43535f4d in ?? ()
#1401 0x5f454e45 in ?? ()
#1402 0x5054554f in ?? ()
---Type <return> to continue, or q <return> to quit---
#1403 0x2f3d5455 in ?? ()
#1404 0x2f727375 in ?? ()
#1405 0x6d697370 in ?? ()
#1406 0x73702f58 in ?? ()
#1407 0x2f2f6d69 in ?? ()
#1408 0x666e6f63 in ?? ()
#1409 0x2f2f6769 in ?? ()
#1410 0x65766173 in ?? ()
#1411 0x65635364 in ?? ()
#1412 0x6972616e in ?? ()
#1413 0x63732e6f in ?? ()
#1414 0x41006766 in ?? ()
#1415 0x5f535355 in ?? ()
#1416 0x504f4353 in ?? ()
#1417 0x564f5f45 in ?? ()
#1418 0x49525245 in ?? ()
#1419 0x303d4544 in ?? ()
#1420 0x49535000 in ?? ()
#1421 0x53415f4d in ?? ()
#1422 0x752f3d4d in ?? ()
#1423 0x702f7273 in ?? ()
#1424 0x586d6973 in ?? ()
#1425 0x6973702f in ?? ()
---Type <return> to continue, or q <return> to quit---
#1426 0x73612f6d in ?? ()
#1427 0x41002f6d in ?? ()
#1428 0x5f535355 in ?? ()
#1429 0x44415453 in ?? ()
#1430 0x4a44415f in ?? ()
#1431 0x3d545355 in ?? ()
#1432 0x4c003033 in ?? ()
#1433 0x53524d41 in ?? ()
#1434 0x73733d48 in ?? ()
#1435 0x782d2068 in ?? ()
#1436 0x52455600 in ?? ()
#1437 0x41434954 in ?? ()
#1438 0x4f465f4c in ?? ()
#1439 0x44415f56 in ?? ()
#1440 0x49544944 in ?? ()
#1441 0x313d4e4f in ?? ()
#1442 0x49440035 in ?? ()
#1443 0x4e415453 in ?? ()
#1444 0x455f4543 in ?? ()
#1445 0x5f545341 in ?? ()
#1446 0x575f4f54 in ?? ()
#1447 0x3d545345 in ?? ()
#1448 0x00303531 in ?? () from /usr/lib/libXm.so.4

... And it continues to #1. Does the above output mean that several memory addresses are being written to that do not exist?

+2  A: 

It means the debugger have no clue what those memory addresses are. This could be because debugging information is missing for the stuff you're debugging - e.g. inside a library that doesn't have debug information.

Though seeing such a long trace usually means you've smashed the stack, overwritten information the debugger needs, lead your program so far astray neither the debugger nor the program have any clue left as to what's going on. (i.e. you've a buffer overflow somewhere, fire up valgrind and try to find it)

nos
+5  A: 

To me it looks like your stack is trashed.

0x52455600 is REV (or VER)
0x41434954 is ACIT (or TICA)
0x4f465f4c is OF_L (or L_FO)
0x2f2f6769 is //gi (or gi//)
0x65766173 is  evas (or save)!
0x65746152 is etaR (or Rate)!

Most of the remaining addresses seem to give nice ascii characters.

You might have overflown a buffer.

Moron
I have no idea why somebody is downvoting perfectly good answers, so here's an upvote.
Paul Tomblin
Because the answer is likely wrong. There is no question the stack *is* bogus. But the root cause is very likely *not* stack corruption, but mismatched binaries.
Employed Russian
@Emp: If you look at the addresses, there seem to be wild jumps in there. For eg: 0x20... to 0x70... to 0x30.... I would expect some locality of reference in those. Plus most of the addresses seem to be nice ascii characters and some address repeat at odd places which makes for a strange recursive method. OP also says they were trying to copy a buffer into a struct. Looks like a buffer/memory overflow to me.
Moron