JtR sprintf compile warnings when configuring with --enable-ztex

gistfile1.txt

last commit: 2020-03-04 17:20 +0200 Maxim Ivanov
0674b6994 - Error out when not SYSTEMWIDE and john_home_path detected empty (#4218)

./configure --enable-ztex

...

Configured for building John the Ripper jumbo:

Target CPU ................................. x86_64 AVX2, 64-bit LE
AES-NI support ............................. run-time detection
Target OS .................................. linux-gnu
Cross compiling ............................ no
Legacy arch header ......................... x86-64.h

Optional libraries/features found:
Memory map (share/page large files) ........ yes
Fork support ............................... yes
OpenMP support ............................. yes (not for fast formats)
OpenCL support ............................. yes
Generic crypt(3) format .................... yes
libgmp (PRINCE mode and faster SRP formats)  yes
128-bit integer (faster PRINCE mode) ....... yes
libz (pkzip and some other formats) ........ yes
libbz2 (gpg2john extra decompression logic)  yes
libpcap (vncpcap2john and SIPdump) ......... yes
OpenMPI support (default disabled) ......... no
ZTEX USB-FPGA module 1.15y support ......... yes

$ gcc --version
gcc (Gentoo 9.2.0-r2 p3) 9.2.0

$ make (optional, -j4)
...

make[3]: Leaving directory '/home/albert/source/other_sources/JohnTheRipper/src/ztex/pkt_comm'
gcc -c -Wall -O2 device.c
device.c: In function ‘device_init_fpgas’:
device.c:162:32: warning: ‘%d’ directive writing 1 byte into a region of size between 0 and 255 [-Wformat-overflow=]
  162 |    sprintf(conf_name_freq, "%s_%d", conf_name_board_freq, fpga_num + 1);
      |                                ^~
device.c:162:28: note: directive argument in the range [1, 5]
  162 |    sprintf(conf_name_freq, "%s_%d", conf_name_board_freq, fpga_num + 1);
      |                            ^~~~~~~
In file included from /usr/include/stdio.h:867,
                 from device.c:12:
/usr/include/bits/stdio2.h:36:10: note: ‘__builtin___sprintf_chk’ output between 3 and 258 bytes into a destination of size 256
   36 |   return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   37 |       __bos (__s), __fmt, __va_arg_pack ());
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
device.c:212:34: warning: ‘%d’ directive writing 1 byte into a region of size between 0 and 255 [-Wformat-overflow=]
  212 |   sprintf(conf_name_config1, "%s_%d", conf_name_board_config1,
      |                                  ^~
device.c:212:30: note: directive argument in the range [1, 5]
  212 |   sprintf(conf_name_config1, "%s_%d", conf_name_board_config1,
      |                              ^~~~~~~
In file included from /usr/include/stdio.h:867,
                 from device.c:12:
/usr/include/bits/stdio2.h:36:10: note: ‘__builtin___sprintf_chk’ output between 3 and 258 bytes into a destination of size 256
   36 |   return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   37 |       __bos (__s), __fmt, __va_arg_pack ());
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

...

Make process completed.