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Infinite recursion in binutils 2.27 (ld, gdb, c++filt)

From: Matthieu Monrocq
Subject: Infinite recursion in binutils 2.27 (ld, gdb, c++filt)
Date: Thu, 29 Sep 2016 15:20:49 +0000


We are hitting an infinite recursion in "ld", eventually leading to a stackoverflow and segfault, when using the --version-script option with a C++ symbol (which "forces" ld to demangle symbols).

This bug also affects our versions of c++filt and gdb.

Commands used:

$ /opt/imc/gcc-6.2.0/bin/g++ -fPIC -std=c++14 -O3 -ggdb -o main.cpp.o -c main.cpp

$ /opt/imc/gcc-6.2.0/bin/g++ -fPIC -std=c++14 -shared -o libCrash.so main.cpp.o -Wl,--version-script=simple.map
collect2: fatal error: ld terminated with signal 11 [Segmentation fault]
compilation terminated.


$ c++filt _ZSt7forwardIRP22XxxxxxxxXxxxxxxXxxxxxxI28XxxxxxxxXxxxXxxxXxxxXxxxxxxxZN3TBQ26XxxxxxxxXxxxXxxxXxxxxxxxxxINS2_14TBQXxxxXxxxxxxINS2_8TBQXxxxxINS2_12XxXxxXxxxxxxINS2_15XxxxxxxxXxxxxxxEEEEEEENS2_10TBQXxxxxxxEE5xxxxxEvEUlRT_RT0_PT1_E_Z28xxxxxxXxxxxxxxXxxxxxxXxxxxxxIS1_SJ_ESt10unique_ptrI31XxxxxxxxXxxxxxxXxxxxxxXxxxxxxxxISD_ESt14default_deleteISN_EESF_EUlR5XxxxxE_ZSK_IS1_SJ_ESQ_SF_EUlvE0_EEOSD_RNSt16remove_referenceISD_E4typeE
Segmentation fault

Versions used:

$ cat /etc/centos-release
CentOS Linux release 7.2.1511 (Core)

$ /opt/imc/gcc-6.2.0/bin/g++ --version
g++ (GCC) 6.2.0

$ c++filt --version
GNU c++filt version 20130226

$ /opt/imc/gcc-6.2.0/bin/ld --version
GNU ld (GNU Binutils) 2.27

$ gdb --version
GNU gdb (GDB) Red Hat Enterprise Linux


The symbols reported in those bug reports do not crash my c++filt:





However the symbol reported in this one does crash c++filt (although not ld):


Kind Regards,

Matthieu Monrocq

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