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Segfault in Perl_grok_number_flags under use feature 'bitwise' #15346
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From @dcollinsnI have compiled bleadperl with the afl-gcc compiler using: ./Configure -Dusedevel -Dprefix='/usr/local/perl-afl' -Dcc='ccache afl-gcc' -Uuselongdouble -Duse64bitall -Doptimize=-g -Uversiononly -Uman1dir -Uman3dir -Dusequadmath -DDEBUGGING -des And then fuzzed the resulting binary using: AFL_NO_VAR_CHECK=1 afl-fuzz -i in -o out bin/perl -t -W @@ After reducing testcases using `afl-tmin` and performing additional minimization by hand, I have located the following testcase that triggers a segmentation fault in the perl interpreter. The testcase is the file below. On debug builds, this returns an assert fail. use feature':all';@0&=0 dcollins@nightshade64:~$ od -c f3i000134 Debugging tool output is below. A git bisect was attempted, but this persists as far back as 5.22, which is when the bitwise feature was first introduced. **GDB** (gdb) run Program received signal SIGSEGV, Segmentation fault. (gdb) run Program received signal SIGABRT, Aborted. **VALGRIND** dcollins@nightshade64:~/perl$ valgrind ./perl -Ilib ../f3i000134 **PERL -V** dcollins@nightshade64:~/perl$ ./perl -Ilib -V Characteristics of this binary (from libperl): |
From @cpansproutOn Fri May 20 19:41:40 2016, dcollinsn@gmail.com wrote:
Thank you for the report. This is fixed in 76734a3. -- Father Chrysostomos |
The RT System itself - Status changed from 'new' to 'open' |
@cpansprout - Status changed from 'open' to 'pending release' |
From @khwilliamsonThank you for filing this report. You have helped make Perl better. With the release today of Perl 5.26.0, this and 210 other issues have been Perl 5.26.0 may be downloaded via: If you find that the problem persists, feel free to reopen this ticket. |
@khwilliamson - Status changed from 'pending release' to 'resolved' |
Migrated from rt.perl.org#128204 (status was 'resolved')
Searchable as RT128204$
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