On Mon, Oct 16, 2017 at 2:30 AM, Pádraig Brady <[email protected]> wrote: > On 15/10/17 18:07, Jaeseung Choi wrote: >> Dear GNU team, >> >> While testing coreutils for a research purpose, we found the following >> crash in 'stty'. Running stty with the command-line "stty eol -F AA" >> raises a crash as below. We did not change any terminal setting, and >> believe the bug is irrelevant from any specific terminal >> configuration. >> >> jason@ubuntu:~$ tar -xf coreutils-8.28.tar.xz >> jason@ubuntu:~$ cd coreutils-8.28/ >> jason@ubuntu:~/coreutils-8.28$ mkdir obj >> jason@ubuntu:~/coreutils-8.28$ cd obj >> jason@ubuntu:~/coreutils-8.28/obj$ ../configure --disable-nls && make >> ... >> jason@ubuntu:~/coreutils-8.28/obj$ gdb ./src/stty -q >> Reading symbols from ./src/stty...done. >> (gdb) run eol -F AA >> Starting program: /home/jason/coreutils-8.28/obj/src/stty eol -F AA >> >> Program received signal SIGSEGV, Segmentation fault. >> set_control_char (info=0x40a6f8 <control_info+120>, info=0x40a6f8 >> <control_info+120>, mode=0x6103c0 <check_mode>, arg=0x0) at >> ../src/stty.c:1695 >> 1695 else if (arg[0] == '\0' || arg[1] == '\0') >> (gdb) x/i $rip >> => 0x40387a <apply_settings+746>: movzbl (%rbx),%r14d >> (gdb) info reg rbx >> rbx 0x0 0 >> (gdb) >> >> We could reproduce the bug in coreutils from version 8.27 to 8.28. >> Also, the bug was reproducible in both Ubuntu 16.04 and Debian 9.1. >> But the stty program pre-built in Debian 9.1 did not crash because >> currently 8.26 version is installed in Debian. > > This is actually an old bug which you can reproduce with -F /dev/tty. > The attached should fix it up.
Thank you! If it's not too hard to determine, would you please mention in the log the commit that introduced the bug?
