From imdb95@gmail.com

Hi,
I found this bug when fuzzing perlembed with afl-fuzz.

**********Compilation**********
Version of perl: the dev version (https://perl5.git.perl.org/perl.git)

root@instance-2:~/fuzz_perl# ./perl/perl -v

This is perl 5, version 31, subversion 2 (v5.31.2
(v5.31.1-6-g9649a81)) built for x86_64-linux

OS: Ubuntu 16.04 LTS 64bit
Compilation of perl, with pre-built clang+llvm (
http://releases.llvm.org/4.0.0/clang+llvm-4.0.0-x86_64-linux-gnu-ubuntu-16.04.tar.xz)
and afl-2.52b:
AFL_USE_ASAN=1 ./Configure -des -Dusedevel -DDEBUGGING -Dcc=afl-clang-fast
-Doptimize=-g
Compilation of file perl_crash.cpp:

AFL_USE_ASAN=1 afl-clang-fast++ perl_crash.cpp -o perl_crash `./perl/perl
-MExtUtils::Embed -e ccopts -e ldopts` -std=c++11

**********Reproduce**********

root@instance-2:~/fuzz_perl# ./perl_crash a '${@=\_})'
'a' =~ /${@=\_})/
ASAN:DEADLYSIGNAL

==5786==ERROR: AddressSanitizer: stack-overflow on address
0x7ffc91cf0f10 (pc 0x0000004de581 bp 0x7ffc91cf1760 sp 0x7ffc91cf0f00
T0)
#0 0x4de580 in BufferedStackTrace
/scratch/llvm/clang-4/xenial/final/llvm.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_stacktrace.h:94:37
#1 0x4de580 in realloc
/scratch/llvm/clang-4/xenial/final/llvm.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:79
#2 0x7cb292 in Perl_safesysrealloc /root/fuzz_perl/perl/util.c:279:18
#3 0x8e8ab6 in Perl_sv_grow /root/fuzz_perl/perl/sv.c:1596:17
#4 0x9374b9 in Perl_sv_catpvn_flags /root/fuzz_perl/perl/sv.c:5492:12
#5 0x98c85e in Perl_sv_catpv_flags /root/fuzz_perl/perl/sv.c:5609:5
#6 0x98c85e in Perl_sv_vcatpvfn_flags /root/fuzz_perl/perl/sv.c:11931
#7 0x96f28c in Perl_sv_vsetpvfn /root/fuzz_perl/perl/sv.c:10987:5
#8 0x7d40a2 in Perl_vmess /root/fuzz_perl/perl/util.c:1498:5
#9 0x7d40a2 in Perl_vcroak /root/fuzz_perl/perl/util.c:1709
#10 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#11 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#12 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#13 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#14 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#15 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#16 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#17 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#18 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#19 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#20 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#21 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#22 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#23 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#24 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#25 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#26 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#27 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#28 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#29 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#30 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#31 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#32 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#33 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#34 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5

#35 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#36 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#37 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#38 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#39 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#40 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#41 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#42 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#43 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#44 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#45 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#46 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#47 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#48 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#49 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#50 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#51 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#52 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#53 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#54 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#55 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#56 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#57 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#58 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#59 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#60 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#61 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#62 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#63 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#64 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#65 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#66 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#67 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#68 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#69 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#70 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#71 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#72 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#73 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#74 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#75 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5

#76 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#77 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#78 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#79 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#80 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#81 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#82 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#83 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#84 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#85 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#86 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#87 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#88 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#89 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#90 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#91 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#92 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#93 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#94 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#95 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#96 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#97 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#98 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#99 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#100 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#101 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#102 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#103 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#104 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#105 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#106 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#107 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#108 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#109 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#110 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#111 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#112 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#113 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#114 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#115 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#116 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6

#117 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#118 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#119 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#120 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#121 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#122 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#123 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#124 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#125 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#126 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#127 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#128 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#129 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#130 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#131 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#132 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#133 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#134 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#135 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#136 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#137 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#138 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#139 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#140 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#141 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#142 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#143 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#144 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#145 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#146 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#147 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#148 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#149 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#150 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#151 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#152 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#153 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#154 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#155 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#156 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#157 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5

#158 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#159 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#160 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#161 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#162 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#163 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#164 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#165 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#166 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#167 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#168 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#169 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#170 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#171 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#172 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#173 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#174 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#175 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#176 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#177 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#178 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#179 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#180 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#181 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#182 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#183 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#184 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#185 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#186 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#187 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#188 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#189 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#190 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#191 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#192 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#193 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#194 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#195 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#196 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#197 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#198 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2

#199 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#200 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#201 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#202 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#203 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#204 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#205 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#206 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#207 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#208 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#209 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#210 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#211 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#212 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#213 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#214 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#215 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#216 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#217 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#218 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#219 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#220 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#221 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#222 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#223 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#224 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#225 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#226 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#227 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#228 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#229 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#230 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#231 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5

#232 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#233 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#234 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#235 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#236 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#237 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#238 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#239 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#240 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#241 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#242 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#243 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#244 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#245 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#246 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2
#247 0x91a029 in Perl_sv_setsv_flags /root/fuzz_perl/perl/sv.c:4300:5
#248 0xa74c2e in Perl_die_unwind /root/fuzz_perl/perl/pp_ctl.c:1724:6
#249 0x7d40ef in Perl_vcroak /root/fuzz_perl/perl/util.c:1711:5
#250 0x7caefa in Perl_croak /root/fuzz_perl/perl/util.c:1756:5
#251 0x7d62a9 in Perl_croak_no_modify /root/fuzz_perl/perl/util.c:1774:5
#252 0x8e5f8b in Perl_sv_force_normal_flags /root/fuzz_perl/perl/sv.c:5278:2

SUMMARY: AddressSanitizer: stack-overflow
/scratch/llvm/clang-4/xenial/final/llvm.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_stacktrace.h:94:37
in BufferedStackTrace
==5786==ABORTING

**************************

Please confirm this.

Thanks,

Manh Nguyen

From imdb95@gmail.com

root@​instance-2​:~/fuzz_perl# ./perl_crash a '${*@​=\_})' 'a' =~ /${*@​=\_})/ ASAN​:DEADLYSIGNAL

root@instance-2:~/fuzz_perl# ./perl_crash a '${@=\_})'
'a' =~ /${@=\_})/
ASAN:DEADLYSIGNAL

stack-overflow (can't grow stack) in Perl_sv_vcatpvfn_flags #17083

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