4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Konstantin Meskhidze <konstantin.meskhidze@xxxxxxxxxx>
[ Upstream commit a3b7039bb2b22fcd2ad20d59c00ed4e606ce3754 ]
Buffer 'new_argv' is accessed without bound check after accessing with
bound check via 'new_argc' index.
Fixes: e298f3b49def ("kconfig: add built-in function support")
Co-developed-by: Ivanov Mikhail <ivanov.mikhail1@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@xxxxxxxxxx>
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
scripts/kconfig/preprocess.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/scripts/kconfig/preprocess.c b/scripts/kconfig/preprocess.c
index 8c7e51a6273cc..0b0d6ed3eeb91 100644
--- a/scripts/kconfig/preprocess.c
+++ b/scripts/kconfig/preprocess.c
@@ -393,6 +393,9 @@ static char *eval_clause(const char *str, size_t len, int argc, char *argv[])
p++;
}
+
+ if (new_argc >= FUNCTION_MAX_ARGS)
+ pperror("too many function arguments");
new_argv[new_argc++] = prev;
/*
--
2.40.1
