https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120540
Bug ID: 120540
Summary: Stack Overflow in libiberty Rust Demangler
(demangle_path / demangle_type recursion)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: plugins
Assignee: unassigned at gcc dot gnu.org
Reporter: xdcao.cs at gmail dot com
Target Milestone: ---
Summary
Passing a specially crafted input to c++filt -r triggers an unbounded mutual
recursion between demangle_path() and demangle_type() in
libiberty/rust-demangle.c, resulting in a stack overflow.
The underlying problem is the lack of recursion depth control or termination
checks on malformed or deeply nested Rust symbol paths. This eventually
overflows the stack during symbol demangling.
This issue was originally reported under binutils
(https://sourceware.org/bugzilla/show_bug.cgi?id=33027) but was redirected
here, as libiberty is maintained by the GCC project.
Environment
GNU Binutils version: 2.44.50 & master
OS: Ubuntu 22.04.5 LTS
Steps to reproduce
# export CFLAGS="-g -O0 -fno-inline -fno-lto -fsanitize=address"
# export CXXFLAGS="-g -O0 -fno-inline -fno-lto -fsanitize=address"
# ./configure --disable-werror --enable-targets=all --enable-gold[=yes]
# make -j64 & make install
root@46b925a575de:# ./c++filt -r @POC
AddressSanitizer:DEADLYSIGNAL
=================================================================
==659719==ERROR: AddressSanitizer: stack-overflow on address 0x7ffc02ed3ec8 (pc
0x0000004997f6 bp 0x7ffc02ed4710 sp 0x7ffc02ed3ed0 T0)
#0 0x4997f6 in __asan_memcpy
(/workspace/new-test/fuzzdir/fz-binutils/fz-c++filt/c++filt+0x4997f6)
#1 0x8a55d5 in str_buf_append
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1572:3
#2 0x8a2586 in print_str
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:279:5
#3 0x8a4514 in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:758:7
#4 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#5 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#6 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#7 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#8 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#9 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#10 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#11 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#12 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#13 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#14 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#15 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#16 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#17 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#18 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#19 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#20 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#21 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#22 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#23 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#24 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#25 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#26 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#27 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#28 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#29 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#30 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#31 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#32 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#33 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#34 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#35 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#36 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#37 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#38 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#39 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#40 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#41 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#42 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#43 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#44 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#45 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#46 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#47 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#48 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#49 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#50 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#51 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#52 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#53 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#54 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#55 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#56 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#57 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#58 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#59 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#60 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#61 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#62 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#63 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#64 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#65 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#66 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#67 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#68 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#69 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#70 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#71 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#72 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#73 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#74 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#75 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#76 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#77 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#78 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#79 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#80 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#81 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#82 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#83 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#84 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#85 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#86 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#87 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#88 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#89 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#90 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#91 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#92 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#93 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#94 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#95 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#96 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#97 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#98 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#99 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#100 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#101 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#102 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#103 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#104 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#105 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#106 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#107 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#108 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#109 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#110 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#111 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#112 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#113 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#114 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#115 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#116 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#117 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#118 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#119 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#120 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#121 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#122 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#123 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#124 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#125 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#126 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#127 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#128 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#129 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#130 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#131 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#132 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#133 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#134 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#135 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#136 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#137 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#138 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#139 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#140 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#141 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#142 0x8a6db9 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1062:7
#143 0x8a6d56 in demangle_type
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:1055:11
#144 0x8a451c in demangle_path
/root/this-program/binutils-gdb/build/libiberty/../../libiberty/rust-demangle.c:759:7
#145 0x8a6db9 in demangle_type
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#146 0x8a6d56 in demangle_type
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SUMMARY: AddressSanitizer: stack-overflow
(/workspace/new-test/fuzzdir/fz-binutils/fz-c++filt/c++filt+0x4997f6) in
__asan_memcpy
==659719==ABORTING
POC
https://drive.google.com/file/d/1zlAvXjGiLQmTNCgfOzcPA-_Kdu6gijF3/view?usp=sharing
Redit
Xiaoguo Li (CUPL)
Xudong Cao (UCAS)
