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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-12-11 20:00:45 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-01-26 09:37:04 +0100
commit3f96ff44bb40567467ccd7c238b3349bd166deb4 (patch)
treed03ad14e1fee984351d8062d34ad29e9984bc111
parent407148e8c01d5060c451a9b5ee3f65f63a7318b6 (diff)
download96b-common-3f96ff44bb40567467ccd7c238b3349bd166deb4.tar.gz
kconfig: fix memory leak when EOF is encountered in quotation
[ Upstream commit fbac5977d81cb2b2b7e37b11c459055d9585273c ] An unterminated string literal followed by new line is passed to the parser (with "multi-line strings not supported" warning shown), then handled properly there. On the other hand, an unterminated string literal at end of file is never passed to the parser, then results in memory leak. [Test Code] ----------(Kconfig begin)---------- source "Kconfig.inc" config A bool "a" -----------(Kconfig end)----------- --------(Kconfig.inc begin)-------- config B bool "b\No new line at end of file ---------(Kconfig.inc end)--------- [Summary from Valgrind] Before the fix: LEAK SUMMARY: definitely lost: 16 bytes in 1 blocks ... After the fix: LEAK SUMMARY: definitely lost: 0 bytes in 0 blocks ... Eliminate the memory leak path by handling this case. Of course, such a Kconfig file is wrong already, so I will add an error message later. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r--scripts/kconfig/zconf.l2
1 files changed, 2 insertions, 0 deletions
diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
index 6534dc5ac803..0c7800112ff5 100644
--- a/scripts/kconfig/zconf.l
+++ b/scripts/kconfig/zconf.l
@@ -191,6 +191,8 @@ n [A-Za-z0-9_-]
}
<<EOF>> {
BEGIN(INITIAL);
+ yylval.string = text;
+ return T_WORD_QUOTE;
}
}