Commit 2ae89c7a authored by Nathan Chancellor's avatar Nathan Chancellor Committed by Masahiro Yamada
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kconfig: Avoid format overflow warning from GCC 8.1



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>
parent bb6d83dd
...@@ -720,7 +720,7 @@ int conf_write(const char *name) ...@@ -720,7 +720,7 @@ int conf_write(const char *name)
struct menu *menu; struct menu *menu;
const char *basename; const char *basename;
const char *str; const char *str;
char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1]; char dirname[PATH_MAX+1], tmpname[PATH_MAX+22], newname[PATH_MAX+8];
char *env; char *env;
dirname[0] = 0; dirname[0] = 0;
......
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