mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-04-08 12:02:33 +02:00
131f1604fa
[ Upstream commit4d137ab010] Currently, when an input line starts with '#', (line + 2) is passed to memcmp() without checking line[1]. It means that line[1] can be any arbitrary character. For example, "#KCONFIG_FOO is not set" is accepted as valid input, functioning the same as "# CONFIG_FOO is not set". More importantly, this can potentially lead to a buffer overrun if line[1] == '\0'. It occurs if the input only contains '#', as (line + 2) points to an uninitialized buffer. Check line[1], and skip the line if it is not a space. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Stable-dep-of:a409fc1463("kconfig: fix memory leak in sym_warn_unmet_dep()") Signed-off-by: Sasha Levin <sashal@kernel.org>