• Nathan Chancellor's avatar
    kconfig: Avoid format overflow warning from GCC 8.1 · 2ae89c7a
    Nathan Chancellor authored and Masahiro Yamada's avatar Masahiro Yamada committed
    
    
    In file included from scripts/kconfig/zconf.tab.c:2485:
    scripts/kconfig/confdata.c: In function ‘conf_write’:
    scripts/kconfig/confdata.c:773:22: warning: ‘%s’ directive writing likely 7 or more bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
      sprintf(newname, "%s%s", dirname, basename);
                          ^~
    scripts/kconfig/confdata.c:773:19: note: assuming directive output of 7 bytes
      sprintf(newname, "%s%s", dirname, basename);
                       ^~~~~~
    scripts/kconfig/confdata.c:773:2: note: ‘sprintf’ output 1 or more bytes (assuming 4104) into a destination of size 4097
      sprintf(newname, "%s%s", dirname, basename);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    scripts/kconfig/confdata.c:776:23: warning: ‘.tmpconfig.’ directive writing 11 bytes into a region of size between 1 and 4097 [-Wformat-overflow=]
       sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
                           ^~~~~~~~~~~
    scripts/kconfig/confdata.c:776:3: note: ‘sprintf’ output between 13 and 4119 bytes into a destination of size 4097
       sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    
    Increase the size of tmpname and newname to make GCC happy.
    
    Cc: stable@vger.kernel.org
    Signed-off-by: default avatarNathan Chancellor <natechancellor@gmail.com>
    Signed-off-by: Masahiro Yamada's avatarMasahiro Yamada <yamada.masahiro@socionext.com>
    2ae89c7a
confdata.c 25.2 KB