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kconfig: fix possible buffer overflow

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[ Upstream commit a3b7039bb2b22fcd2ad20d59c00ed4e606ce3754 ]

Buffer 'new_argv' is accessed without bound check after accessing with
bound check via 'new_argc' index.

Fixes: e298f3b49d ("kconfig: add built-in function support")
Co-developed-by: Ivanov Mikhail <ivanov.mikhail1@huawei-partners.com>
Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Konstantin Meskhidze 2023-09-05 17:59:14 +08:00 committed by Greg Kroah-Hartman
parent 6cc6f79b93
commit 84f9953215
1 changed files with 3 additions and 0 deletions
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3
scripts/kconfig/preprocess.c
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@ -396,6 +396,9 @@ 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;
/*