#15483 closed defect (invalid)
SCUMM: INDY3: heap buffer-overflow in Scumm::MacGuiImpl::readPascalString()
Reported by: | dwatteau | Owned by: | dwatteau |
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Priority: | normal | Component: | Engine: SCUMM |
Version: | Keywords: | macintosh | |
Cc: | Game: | Indiana Jones 3 |
Description
Current Git HEAD, built with --enable-asan
, and starting the Macintosh release of Indy3 gives this:
User picked target 'indy3-ega-mac' (engine ID 'scumm', game ID 'indy3')... ================================================================= ==8371==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61f0000bea06 at pc 0x000109af2224 bp 0x7ff7b6775ac0 sp 0x7ff7b6775ab8 READ of size 1 at 0x61f0000bea06 thread T0 #0 0x109af2223 in Scumm::MacGuiImpl::readPascalString(unsigned char*&) macgui_impl.cpp:83 #1 0x109b123b4 in Scumm::MacIndy3Gui::readStrings() macgui_indy3.cpp:1032 #2 0x109b0ff4e in Scumm::MacIndy3Gui::MacIndy3Gui(Scumm::ScummEngine*, Common::Path const&) macgui_indy3.cpp:931 #3 0x109b10c34 in Scumm::MacIndy3Gui::MacIndy3Gui(Scumm::ScummEngine*, Common::Path const&) macgui_indy3.cpp:880 #4 0x109adb930 in Scumm::MacGui::MacGui(Scumm::ScummEngine*, Common::Path const&) macgui.cpp:35 #5 0x109adba64 in Scumm::MacGui::MacGui(Scumm::ScummEngine*, Common::Path const&) macgui.cpp:32 #6 0x109dd5b17 in Scumm::ScummEngine::init() scumm.cpp:1206 #7 0x1099004fe in Scumm::ScummEngine::run() scumm.h:581 #8 0x1097cd2df in runGame(Plugin const*, OSystem&, DetectedGame const&, void const*) main.cpp:311 #9 0x1097c6d60 in scummvm_main main.cpp:796 #10 0x1097b4b52 in main macosx-main.cpp:44 #11 0x7ff800920417 in start+0x767 (dyld:x86_64+0xfffffffffff6e417) 0x61f0000bea06 is located 0 bytes after 2950-byte region [0x61f0000bde80,0x61f0000bea06) allocated by thread T0 here: #0 0x10cc5be40 in wrap_malloc+0xa0 (libclang_rt.asan_osx_dynamic.dylib:x86_64h+0xdde40) #1 0x109b11622 in Scumm::MacIndy3Gui::readStrings() macgui_indy3.cpp:946 #2 0x109b0ff4e in Scumm::MacIndy3Gui::MacIndy3Gui(Scumm::ScummEngine*, Common::Path const&) macgui_indy3.cpp:931 #3 0x109b10c34 in Scumm::MacIndy3Gui::MacIndy3Gui(Scumm::ScummEngine*, Common::Path const&) macgui_indy3.cpp:880 #4 0x109adb930 in Scumm::MacGui::MacGui(Scumm::ScummEngine*, Common::Path const&) macgui.cpp:35 #5 0x109adba64 in Scumm::MacGui::MacGui(Scumm::ScummEngine*, Common::Path const&) macgui.cpp:32 #6 0x109dd5b17 in Scumm::ScummEngine::init() scumm.cpp:1206 #7 0x1099004fe in Scumm::ScummEngine::run() scumm.h:581 #8 0x1097cd2df in runGame(Plugin const*, OSystem&, DetectedGame const&, void const*) main.cpp:311 #9 0x1097c6d60 in scummvm_main main.cpp:796 #10 0x1097b4b52 in main macosx-main.cpp:44 #11 0x7ff800920417 in start+0x767 (dyld:x86_64+0xfffffffffff6e417) SUMMARY: AddressSanitizer: heap-buffer-overflow macgui_impl.cpp:83 in Scumm::MacGuiImpl::readPascalString(unsigned char*&) Shadow bytes around the buggy address: 0x61f0000be780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x61f0000be800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x61f0000be880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x61f0000be900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x61f0000be980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x61f0000bea00:[06]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x61f0000bea80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x61f0000beb00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x61f0000beb80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x61f0000bec00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x61f0000bec80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==8371==ABORTING Abort trap: 6
Change History (2)
comment:1 by , 2 hours ago
Owner: | set to |
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Resolution: | → invalid |
Status: | new → closed |
comment:2 by , 2 hours ago
Ah. Yeah, I seem to remember fixing a bug where if it extracted the last string in the resource it would read beyond the end of the buffer. Perhaps that's what you saw.
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erik told me that he couldn't replicate this issue.
Looking a bit at what I was doing, I was building from an older Git tree from October, by mistake.
So, false alert; this issue doesn't happen with the current Git HEAD anymore, it seems.
Sorry for the noise!