# New Ticket Created by Sergey Aleynikov # Please include the string: [perl #130623] # in the subject line of all future correspondence about this issue. # <URL: https://rt.perl.org/Ticket/Display.html?id=130623 > This is a bug report for perl from sergey.aleynikov@gmail.com, generated with the help of perlbug 1.40 running under perl 5.25.9. ----------------------------------------------------------------- [Please describe your issue here] While fuzzing perl v5.25.8-216-gfbceb79751 built with afl and run under libdislocator, I found the following program tie$0,*0 to cause an assertion failure. This is a regression in blead, bisect points to 0b077c88df88ab0d1e7e4c9d8a5a6992563912e1 is the first bad commit commit 0b077c88df88ab0d1e7e4c9d8a5a6992563912e1 Author: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org> Date: Sun Nov 13 15:10:38 2016 +0100 Improve error for missing tie() pacakge/method This brings the error messages in line with the ones used for normal method calls, despite not using call_method(). GDB info about the crash location: (gdb) bt #0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58 #1 0x00007f869ed7f40a in __GI_abort () at abort.c:89 #2 0x00007f869ed76e47 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x7f86a04924f6 "!isGV_with_GP(_svcur)", file=file@entry=0x7f86a049245f "pp_sys.c", line=line@entry=957, function=function@entry=0x7f86a0494a80 <__PRETTY_FUNCTION__.15407> "Perl_pp_tie") at assert.c:92 #3 0x00007f869ed76ef2 in __GI___assert_fail (assertion=0x7f86a04924f6 "!isGV_with_GP(_svcur)", file=0x7f86a049245f "pp_sys.c", line=957, function=0x7f86a0494a80 <__PRETTY_FUNCTION__.15407> "Perl_pp_tie") at assert.c:101 #4 0x00007f86a033e545 in Perl_pp_tie () at pp_sys.c:957 #5 0x00007f86a0200bde in Perl_runops_debug () at dump.c:2260 #6 0x00007f86a00fb156 in S_run_body (oldscope=1) at perl.c:2528 #7 0x00007f86a00fa6d4 in perl_run (my_perl=0x7f86a1732010) at perl.c:2451 #8 0x00007f86a00b5d3e in main (argc=2, argv=0x7fff65409c28, env=0x7fff65409c40) at perlmain.c:123 [Please do not change anything below this line] ----------------------------------------------------------------- --- Flags: category=core severity=medium --- Site configuration information for perl 5.25.9: Configured by root at Sat Jan 14 02:25:05 MSK 2017. Summary of my perl5 (revision 5 version 25 subversion 9) configuration: Commit id: cbe2fc5001aa59cdc73e04cc35e097a2ecfbeec0 Platform: osname=linux osvers=3.16.0-4-amd64 archname=x86_64-linux uname='linux dorothy 3.16.0-4-amd64 #1 smp debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 gnulinux ' config_args='-des -Dusedevel -DDEBUGGING -Dcc=afl-clang-fast -Doptimize=-O0 -g -ggdb3' hint=recommended useposix=true d_sigaction=define useithreads=undef usemultiplicity=undef use64bitint=define use64bitall=define uselongdouble=undef usemymalloc=n bincompat5005=undef Compiler: cc='afl-clang-fast' ccflags ='-DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2' optimize='-O0 -g -ggdb3' cppflags='-DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector-strong -I/usr/local/include' ccversion='' gccversion='4.2.1 Compatible Clang 3.9.1 (tags/RELEASE_391/rc2)' gccosandvers='' intsize=4 longsize=8 ptrsize=8 doublesize=8 byteorder=12345678 doublekind=3 d_longlong=define longlongsize=8 d_longdbl=define longdblsize=16 longdblkind=3 ivtype='long' ivsize=8 nvtype='double' nvsize=8 Off_t='off_t' lseeksize=8 alignbytes=8 prototype=define Linker and Libraries: ld='afl-clang-fast' ldflags =' -fstack-protector-strong -L/usr/local/lib' libpth=/usr/local/lib /usr/lib/llvm-3.9/bin/../lib/clang/3.9.1/lib /usr/include/x86_64-linux-gnu /usr/lib /lib/x86_64-linux-gnu /lib/../lib /usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib libs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc libc=libc-2.24.so so=so useshrplib=false libperl=libperl.a gnulibc_version='2.24' Dynamic Linking: dlsrc=dl_dlopen.xs dlext=so d_dlsymun=undef ccdlflags='-Wl,-E' cccdlflags='-fPIC' lddlflags='-shared -O0 -g -ggdb3 -L/usr/local/lib -fstack-protector-strong' --- @INC for perl 5.25.9: lib /usr/local/lib/perl5/site_perl/5.25.9/x86_64-linux /usr/local/lib/perl5/site_perl/5.25.9 /usr/local/lib/perl5/5.25.9/x86_64-linux /usr/local/lib/perl5/5.25.9 --- Environment for perl 5.25.9: HOME=/home/afl LANG=en_US.UTF-8 LANGUAGE=en_US:en LD_LIBRARY_PATH (unset) LOGDIR (unset) PATH=/home/afl/perlbrew/bin:/home/afl/perlbrew/perls/perl-5.22.1/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games PERLBREW_BASHRC_VERSION=0.78 PERLBREW_HOME=/home/afl/.perlbrew PERLBREW_MANPATH=/home/afl/perlbrew/perls/perl-5.22.1/man PERLBREW_PATH=/home/afl/perlbrew/bin:/home/afl/perlbrew/perls/perl-5.22.1/bin PERLBREW_PERL=perl-5.22.1 PERLBREW_ROOT=/home/afl/perlbrew PERLBREW_VERSION=0.78 PERL_BADLANG (unset) SHELL=/usr/bin/zshThread Previous