From: Marta Rybczynska <rybczyn...@gmail.com> This patch adds a fix for incorrect casting from signed to unsigned in grub's util/grub-editenv. 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> Signed-off-by: Steve Sakoman <st...@sakoman.com> --- ...v-Fix-incorrect-casting-of-a-signed-.patch | 46 +++++++++++++++++++ meta/recipes-bsp/grub/grub2.inc | 1 + 2 files changed, 47 insertions(+) create mode 100644 meta/recipes-bsp/grub/files/0042-util-grub-editenv-Fix-incorrect-casting-of-a-signed-.patch diff --git a/meta/recipes-bsp/grub/files/0042-util-grub-editenv-Fix-incorrect-casting-of-a-signed-.patch b/meta/recipes-bsp/grub/files/0042-util-grub-editenv-Fix-incorrect-casting-of-a-signed-.patch new file mode 100644 index 0000000000..0cd8ec3611 --- /dev/null +++ b/meta/recipes-bsp/grub/files/0042-util-grub-editenv-Fix-incorrect-casting-of-a-signed-.patch @@ -0,0 +1,46 @@ +From 3d68daf2567aace4b52bd238cfd4a8111af3bc04 Mon Sep 17 00:00:00 2001 +From: Darren Kenny <darren.ke...@oracle.com> +Date: Thu, 5 Nov 2020 14:33:50 +0000 +Subject: [PATCH] util/grub-editenv: Fix incorrect casting of a signed value + +The return value of ftell() may be negative (-1) on error. While it is +probably unlikely to occur, we should not blindly cast to an unsigned +value without first testing that it is not negative. + +Fixes: CID 73856 + +Signed-off-by: Darren Kenny <darren.ke...@oracle.com> +Reviewed-by: Daniel Kiper <daniel.ki...@oracle.com> + +Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=5dc41edc4eba259c6043ae7698c245ec1baaacc6] +Signed-off-by: Marta Rybczynska <marta.rybczyn...@huawei.com> +--- + util/grub-editenv.c | 8 +++++++- + 1 file changed, 7 insertions(+), 1 deletion(-) + +diff --git a/util/grub-editenv.c b/util/grub-editenv.c +index f3662c9..db6f187 100644 +--- a/util/grub-editenv.c ++++ b/util/grub-editenv.c +@@ -125,6 +125,7 @@ open_envblk_file (const char *name) + { + FILE *fp; + char *buf; ++ long loc; + size_t size; + grub_envblk_t envblk; + +@@ -143,7 +144,12 @@ open_envblk_file (const char *name) + grub_util_error (_("cannot seek `%s': %s"), name, + strerror (errno)); + +- size = (size_t) ftell (fp); ++ loc = ftell (fp); ++ if (loc < 0) ++ grub_util_error (_("cannot get file location `%s': %s"), name, ++ strerror (errno)); ++ ++ size = (size_t) loc; + + if (fseek (fp, 0, SEEK_SET) < 0) + grub_util_error (_("cannot seek `%s': %s"), name, diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc index 7ca0b469e9..a1fbc5e644 100644 --- a/meta/recipes-bsp/grub/grub2.inc +++ b/meta/recipes-bsp/grub/grub2.inc @@ -88,6 +88,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \ 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 \ file://0041-util-grub-install-Fix-NULL-pointer-dereferences.patch \ + file://0042-util-grub-editenv-Fix-incorrect-casting-of-a-signed-.patch \ " SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934" SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea" -- 2.25.1
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