This patch adds a check for a NULL pointer before use in grub's loader/xnu. It is a part of a security series [1].
[1] https://lists.gnu.org/archive/html/grub-devel/2021-03/msg00007.html Signed-off-by: Marta Rybczynska <marta.rybczyn...@huawei.com> --- ...k-if-pointer-is-NULL-before-using-it.patch | 42 +++++++++++++++++++ meta/recipes-bsp/grub/grub2.inc | 1 + 2 files changed, 43 insertions(+) create mode 100644 meta/recipes-bsp/grub/files/0040-loader-xnu-Check-if-pointer-is-NULL-before-using-it.patch diff --git a/meta/recipes-bsp/grub/files/0040-loader-xnu-Check-if-pointer-is-NULL-before-using-it.patch b/meta/recipes-bsp/grub/files/0040-loader-xnu-Check-if-pointer-is-NULL-before-using-it.patch new file mode 100644 index 0000000000..8081f7763a --- /dev/null +++ b/meta/recipes-bsp/grub/files/0040-loader-xnu-Check-if-pointer-is-NULL-before-using-it.patch @@ -0,0 +1,42 @@ +From 778a3fffd19229e5650a1abfb06c974949991cd4 Mon Sep 17 00:00:00 2001 +From: Paulo Flabiano Smorigo <pfsmor...@canonical.com> +Date: Mon, 30 Nov 2020 10:36:00 -0300 +Subject: [PATCH] loader/xnu: Check if pointer is NULL before using it + +Fixes: CID 73654 + +Signed-off-by: Paulo Flabiano Smorigo <pfsmor...@canonical.com> +Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com> + +Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=7c8a2b5d1421a0f2a33d33531f7561f3da93b844] +Signed-off-by: Marta Rybczynska <marta.rybczyn...@huawei.com> +--- + grub-core/loader/xnu.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +diff --git a/grub-core/loader/xnu.c b/grub-core/loader/xnu.c +index 39ceff8..adc048c 100644 +--- a/grub-core/loader/xnu.c ++++ b/grub-core/loader/xnu.c +@@ -667,6 +667,9 @@ grub_xnu_load_driver (char *infoplistname, grub_file_t binaryfile, + char *name, *nameend; + int namelen; + ++ if (infoplistname == NULL) ++ return grub_error (GRUB_ERR_BAD_FILENAME, N_("missing p-list filename")); ++ + name = get_name_ptr (infoplistname); + nameend = grub_strchr (name, '/'); + +@@ -698,10 +701,7 @@ grub_xnu_load_driver (char *infoplistname, grub_file_t binaryfile, + else + macho = 0; + +- if (infoplistname) +- infoplist = grub_file_open (infoplistname, GRUB_FILE_TYPE_XNU_INFO_PLIST); +- else +- infoplist = 0; ++ infoplist = grub_file_open (infoplistname, GRUB_FILE_TYPE_XNU_INFO_PLIST); + grub_errno = GRUB_ERR_NONE; + if (infoplist) + { diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc index eebe9a7233..fad7415e0d 100644 --- a/meta/recipes-bsp/grub/grub2.inc +++ b/meta/recipes-bsp/grub/grub2.inc @@ -86,6 +86,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \ file://0037-loader-bsd-Check-for-NULL-arg-up-front.patch \ file://0038-loader-xnu-Fix-memory-leak.patch \ file://0039-loader-xnu-Free-driverkey-data-when-an-error-is-dete.patch \ + file://0040-loader-xnu-Check-if-pointer-is-NULL-before-using-it.patch \ " SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934" SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea" -- 2.33.0
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