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Assertion failure in S_regmatch (regexec.c:7279) #16867

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p5pRT opened this issue Mar 3, 2019 · 3 comments
Open

Assertion failure in S_regmatch (regexec.c:7279) #16867

p5pRT opened this issue Mar 3, 2019 · 3 comments
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assertion failure type-core type-regex

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@p5pRT
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p5pRT commented Mar 3, 2019

Migrated from rt.perl.org#133885 (status was 'open')

Searchable as RT133885$
@p5pRT
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p5pRT commented Mar 3, 2019

From @dur-randir

Created by @dur-randir

While fuzzing perl v5.29.8-21-gde59f38ed9 built with afl and run
under libdislocator, I found the following program

s((?{my sub f})())00

to cause an assertion failure​:

perl​: regexec.c​:7295​: ssize_t S_regmatch(regmatch_info *, char *,
regnode *)​: Assertion `o->op_type == OP_NEXTSTATE || o->op_type ==
OP_DBSTATE || (o->op_type == OP_NULL && ( o->op_targ == OP_NEXTSTATE
|| o->op_targ == OP_DBSTATE ) )' failed.

GDB stack trace is following​:

#0 __GI_raise (sig=sig@​entry=6) at ../sysdeps/unix/sysv/linux/raise.c​:50
#1 0x00007ffff7c25535 in __GI_abort () at abort.c​:79
#2 0x00007ffff7c2540f in __assert_fail_base (fmt=0x7ffff7d87ee0
"%s%s%s​:%u​: %s%sAssertion `%s' failed.\n%n",
  assertion=0x10ec280 <.str.318> "o->op_type == OP_NEXTSTATE ||
o->op_type == OP_DBSTATE || (o->op_type == OP_NULL && ( o->op_targ ==
OP_NEXTSTATE || o->op_targ == OP_DBSTATE ) )", file=0x10ca1e0 <.str.2>
"regexec.c", line=7295, function=<optimized out>) at assert.c​:92
#3 0x00007ffff7c330f2 in __GI___assert_fail (
  assertion=0x10ec280 <.str.318> "o->op_type == OP_NEXTSTATE ||
o->op_type == OP_DBSTATE || (o->op_type == OP_NULL && ( o->op_targ ==
OP_NEXTSTATE || o->op_targ == OP_DBSTATE ) )", file=0x10ca1e0 <.str.2>
"regexec.c", line=7295,
  function=0x10e4e00 <__PRETTY_FUNCTION__.S_regmatch> "ssize_t
S_regmatch(regmatch_info *, char *, regnode *)") at assert.c​:101
#4 0x0000000000ceb201 in S_regmatch (reginfo=<optimized out>,
startpos=<optimized out>, prog=0x60800000bc58) at regexec.c​:7288
#5 0x0000000000ca76be in S_regtry (reginfo=<optimized out>,
startposp=<optimized out>) at regexec.c​:3933
#6 0x0000000000c6d2b4 in Perl_regexec_flags (rx=<optimized out>,
stringarg=0x107bf20 <.str.90> "", strend=0x107bf20 <.str.90> "",
strbeg=<optimized out>,
  minend=105827994212176, sv=<optimized out>, data=<optimized out>,
flags=<optimized out>) at regexec.c​:3790
#7 0x0000000000992609 in Perl_pp_subst () at pp_hot.c​:4231
#8 0x000000000088f835 in Perl_runops_debug () at dump.c​:2537
#9 0x00000000005f1016 in S_run_body (oldscope=<optimized out>) at perl.c​:2692
#10 perl_run (my_perl=<optimized out>) at perl.c​:2615
#11 0x000000000050b60b in main (argc=0, argv=<optimized out>,
env=0x7fffffffe1e8) at perlmain.c​:127

Perl Info 

Flags:
    category=core
    severity=low

Site configuration information for perl 5.29.9:

Configured by dur-randir at Wed Feb 27 14:51:01 MSK 2019.

Summary of my perl5 (revision 5 version 29 subversion 9) configuration:
  Commit id: c1e47bad34ce1d9c84ed57c9b8978bcbd5a02e98
  Platform:
    osname=darwin
    osvers=13.4.0
    archname=darwin-thread-multi-2level
    uname='darwin isengard.local 13.4.0 darwin kernel version 13.4.0:
mon jan 11 18:17:34 pst 2016; root:xnu-2422.115.15~1release_x86_64
x86_64 '
    config_args='-de -Dusedevel -DDEBUGGING -Dusethreads'
    hint=recommended
    useposix=true
    d_sigaction=define
    useithreads=define
    usemultiplicity=define
    use64bitint=define
    use64bitall=define
    uselongdouble=undef
    usemymalloc=n
    default_inc_excludes_dot=define
    bincompat5005=undef
  Compiler:
    cc='cc'
    ccflags ='-fno-common -DPERL_DARWIN -mmacosx-version-min=10.9
-DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector
-I/usr/local/include -DPERL_USE_SAFE_PUTENV'
    optimize='-O3 -g'
    cppflags='-fno-common -DPERL_DARWIN -mmacosx-version-min=10.9
-DDEBUGGING -fno-strict-aliasing -pipe -fstack-protector
-I/usr/local/include'
    ccversion=''
    gccversion='4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.56)'
    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='cc'
    ldflags =' -mmacosx-version-min=10.9 -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0/lib
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib
/usr/lib
    libs=-lpthread -lgdbm -ldbm -ldl -lm -lutil -lc
    perllibs=-lpthread -ldl -lm -lutil -lc
    libc=
    so=dylib
    useshrplib=false
    libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs
    dlext=bundle
    d_dlsymun=undef
    ccdlflags=' '
    cccdlflags=' '
    lddlflags=' -mmacosx-version-min=10.9 -bundle -undefined
dynamic_lookup -L/usr/local/lib -fstack-protector'



@INC for perl 5.29.9:
    lib
    /usr/local/lib/perl5/site_perl/5.29.9/darwin-thread-multi-2level
    /usr/local/lib/perl5/site_perl/5.29.9
    /usr/local/lib/perl5/5.29.9/darwin-thread-multi-2level
    /usr/local/lib/perl5/5.29.9


Environment for perl 5.29.9:
    DYLD_LIBRARY_PATH (unset)
    HOME=/Users/dur-randir
    LANG=en_US.UTF-8
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/Users/dur-randir/perlbrew/bin:/Users/dur-randir/perlbrew/perls/perl-5.22.1/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/texbin
    PERLBREW_HOME=/Users/dur-randir/.perlbrew
    PERLBREW_MANPATH=/Users/dur-randir/perlbrew/perls/perl-5.22.1/man
    PERLBREW_PATH=/Users/dur-randir/perlbrew/bin:/Users/dur-randir/perlbrew/perls/perl-5.22.1/bin
    PERLBREW_PERL=perl-5.22.1
    PERLBREW_ROOT=/Users/dur-randir/perlbrew
    PERLBREW_SHELLRC_VERSION=0.84
    PERLBREW_VERSION=0.84
    PERL_BADLANG (unset)
    SHELL=/usr/local/bin/zsh

@p5pRT
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p5pRT commented Mar 23, 2019

From @khwilliamson

I looked at this, and this failure appears to have been there since the lexical subs feature was added in 5.18
--
Karl Williamson

@p5pRT
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p5pRT commented Mar 23, 2019

The RT System itself - Status changed from 'new' to 'open'

@toddr toddr removed the khw label Oct 25, 2019
@xenu xenu removed the affects-5.29 label Nov 19, 2021
@xenu xenu removed the Severity Low label Dec 29, 2021
@khwilliamson khwilliamson mentioned this issue Apr 1, 2022
Merged
@tonycoz tonycoz mentioned this issue Jun 15, 2023
Closed
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