Opened 20 years ago

Closed 20 years ago

Last modified 5 years ago

#1369 closed defect (fixed)

DIG: Crash in bundle decoder

Reported by: Kirben Owned by: fingolfin
Priority: normal Component: Engine: SCUMM
Version: Keywords:
Cc: Game: The Dig


Latest ScummVM cvs version. English version of The Dig [PC]. Compiled under mingw with GCC 3.2.3 and running under Windows XP.

The Dig crash when launching the Pig at start of game. A gdb back trace is below:

Program received signal SIGSEGV, Segmentation fault. [Switching to thread 1964.0x144] 0x0049f9ff in Scumm::compDecode(unsigned char*, unsigned char*) (src=0x24761e0 "ż\003x", dst=0x2bc055c "x") at scumm/bundle.cpp:458 458 *dstptr++ = *srcptr++; (gdb) bt #0 0x0049f9ff in Scumm::compDecode(unsigned char*, unsigned char*) (src=0x24761e0 "ż\003x", dst=0x2bc055c "x") at scumm/bundle.cpp:458 #1 0x004a04a1 in Scumm::Bundle::decompressCodec (int, unsigned char*, unsigned char*, int) ( this=0x14489a0, codec=12, comp_input=0x24761e0 "ż\003x", comp_output=0x2bc055c "x", input_size=4317) at scumm/bundle.cpp:756 #2 0x0049f71a in Scumm::Bundle::decompressMusicSampleByIndex(int, int, unsigned char*) ( this=0x14489a0, index=0, number=375, comp_final=0x2bc055c "x") at scumm/bundle.cpp:362 #3 0x0049f86c in Scumm::Bundle::decompressMusicSampleByName(char const*, int, unsigned char*) ( this=0x14489a0, name=0x43d5fc "ASTERO~1.IMU", number=375, comp_final=0x2bc055c "x") at scumm/bundle.cpp:402 #4 0x0043c2c0 in Scumm::IMuseDigital::bundleMusicHandler() (this=0x2320048) at scumm/imuse_digi.cpp:1298 #5 0x0043bc96 in Scumm::IMuseDigital::music_handler (void*) (refCon=0x2320048) at scumm/imuse_digi.cpp:1196 #6 0x005db931 in Timer::handler(int) (this=0x13768f8, t=10) at common/timer.cpp:99 #7 0x005db7c8 in Timer::timer_handler(int) (t=10) at common/timer.cpp:79 #8 0x10024339 in SDL_SetTimer () from C:\msys\1.0 \local\bin\SDL.dll

Ticket imported from: #869045. Ticket imported from: bugs/1369.

Change History (5)

comment:1 by fingolfin, 20 years ago

Summary: DIG: Crash when launching PigDIG: Crash in bundle decoder

comment:2 by fingolfin, 20 years ago

The crash is not related to the pig scene. Rather, just start the dig, skip the intro, and wait. For me it always crashes when number=382 (at least in all test runs I made so far). INterestingly for you it crashes for number=375...

Maybe this is a buffer overrund, or a stack smasher... that would explain why it crashes after some time only, and why for slightly different values for us two.

BTW, my recent bundle.cpp changes are only whitespace changes, and as thus I am sure they are not related. Rather the ImuseDigital changes will likely be the cause (and/or mixer changes).

comment:3 by fingolfin, 20 years ago

Some more info: when inited, the bundle decoder stores these values: _compMusicTable[380] = (1645675, 4329, 10) _compMusicTable[381] = (1650004, 4352, 12) _compMusicTable[382] = (1654356, 4246, 11)

When it crashes, i get something like this: offset = -2030663794, size = -276327955, codec = -2020153721

Looks indeed like memory corruption.

comment:4 by fingolfin, 20 years ago

Owner: set to fingolfin
Resolution: fixed
Status: newclosed

comment:5 by digitall, 5 years ago

Component: Engine: SCUMM
Game: The Dig
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