Crash Report: SEGV in ReadIndirectAddress

[emptyiscolor]

Summary

Application: bloaty
Issue: Segmentation fault (SEGV) in ReadIndirectAddress function
Detection Tool: AddressSanitizer

Environment

• OS: Ubuntu 20.04.6 LTS
• Compiler: clang version 22

Crash Details

• Command: ./bloaty -d compileunits ./crash_sample1
• Function: ReadIndirectAddress
• Root Cause: READ memory access to zero page (null pointer dereference)

Stack Trace

#0  0x55c43bde7969 in dwarf /src/bloaty/src/dwarf/debug_info.h:259:39
#1  0x55c43bde7969 in ReadIndirectAddress /src/bloaty/src/dwarf/debug_info.h:343:42
#2  0x55c43bde7969 in bloaty::dwarf::AttrValue::ResolveIndirectAddress(bloaty::dwarf::CU const&) const /src/bloaty/src/dwarf/attr.cc:125:10
#3  0x55c43bdee316 in operator() /src/bloaty/src/dwarf/debug_info.cc:233:31
#4  0x55c43bdee316 in ReadAttributes<(lambda at /src/bloaty/src/dwarf/debug_info.cc:203:22)> /src/bloaty/src/dwarf/debug_info.h:363:5
#5  0x55c43bdee316 in bloaty::dwarf::CU::ReadTopLevelDIE(bloaty::dwarf::InfoReader&) /src/bloaty/src/dwarf/debug_info.cc:202:14
#6  0x55c43bded725 in bloaty::dwarf::CU::ReadHeader(...) /src/bloaty/src/dwarf/debug_info.cc:185:3
#7  0x55c43bdecd2f in bloaty::dwarf::CUIter::NextCU(bloaty::dwarf::InfoReader&, bloaty::dwarf::CU*) /src/bloaty/src/dwarf/debug_info.cc:121:7
#8  0x55c43bde06b4 in bloaty::ReadDWARFDebugInfo(...) /src/bloaty/src/dwarf.cc:595:15
#9  0x55c43bddfdea in bloaty::ReadDWARFCompileUnits(...) /src/bloaty/src/dwarf.cc:670:3
#10 0x55c43bd88fab in ReadDWARFCompileUnits /src/bloaty/src/bloaty.h:306:10
#11 0x55c43bd88fab in bloaty::(anonymous namespace)::ElfObjectFile::ProcessFile(...) /src/bloaty/src/elf.cc:1334:11
#12 0x55c43bd461b5 in bloaty::Bloaty::ScanAndRollupFile(...) /src/bloaty/src/bloaty.cc:1799:9

Attachment:

crash_sample_log.zip

[EricRahm]

It looks like #475 fixes this.