This is a note to let you know that I've just added the patch titled
kconfig: add fflush() before ferror() check
to the 5.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kconfig-add-fflush-before-ferror-check.patch
and it can be found in the queue-5.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c2aa41964448c89c44f54eff2629a48e03f820f7
Author: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Date: Sun Feb 13 01:18:37 2022 +0900
kconfig: add fflush() before ferror() check
[ Upstream commit 868653f421cd37e8ec3880da19f0aac93f5c46cc ]
As David Laight pointed out, there is not much point in calling
ferror() unless you call fflush() first.
Reported-by: David Laight <David.Laight@xxxxxxxxxx>
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index d3c3a61308ad..94dcec2cc803 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -979,6 +979,7 @@ static int conf_write_autoconf_cmd(const char *autoconf_name)
fprintf(out, "\n$(deps_config): ;\n");
+ fflush(out);
ret = ferror(out); /* error check for all fprintf() calls */
fclose(out);
if (ret)
@@ -1097,6 +1098,7 @@ static int __conf_write_autoconf(const char *filename,
if ((sym->flags & SYMBOL_WRITE) && sym->name)
print_symbol(file, sym);
+ fflush(file);
/* check possible errors in conf_write_heading() and print_symbol() */
ret = ferror(file);
fclose(file);
