question about regex

[liqingqing <liqingqing3@huawei.com>]

Hello Florian and all glibc developers.

I wonder ask you that do we have any plan or good ways to fix up the bug as below:


https://sourceware.org/bugzilla/show_bug.cgi?id=24269

Dhiraj 2019-02-26 06:24:20 UTC
While fuzzing the regex module via hongfuzz

$ echo D | grep -E "$(printf '(\0|)(\\1\\1)*')"
  bash: warning: command substitution: ignored null byte in input
  Segmentation fault (core dumped)

==6453== Process terminating with default action of signal 13 (SIGPIPE)
==6453==    at 0x4F4C154: write (write.c:27)
==6453==    by 0x4EC71BC: _IO_file_write@@GLIBC_2.2.5 (fileops.c:1203)
==6453==    by 0x4EC8F50: new_do_write (fileops.c:457)
==6453==    by 0x4EC8F50: _IO_do_write@@GLIBC_2.2.5 (fileops.c:433)
==6453==    by 0x4EC6787: _IO_file_sync@@GLIBC_2.2.5 (fileops.c:813)
==6453==    by 0x4EBA87C: fflush (iofflush.c:40)
==6453==    by 0x10CE73: ??? (in /bin/echo)
==6453==    by 0x10C939: ??? (in /bin/echo)
==6453==    by 0x10A221: ??? (in /bin/echo)
==6453==    by 0x4E7F040: __run_exit_handlers (exit.c:108)
==6453==    by 0x4E7F139: exit (exit.c:139)
==6453==    by 0x4E5DB9D: (below main) (libc-start.c:344)
==6453==

OS: Linux ubuntu 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux