From: Marta Rybczynska <rybczyn...@gmail.com> This patch fixes a potential overflow in grub's disk/cryptodisk. 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> --- ...odisk-Fix-potential-integer-overflow.patch | 50 +++++++++++++++++++ meta/recipes-bsp/grub/grub2.inc | 1 + 2 files changed, 51 insertions(+) create mode 100644 meta/recipes-bsp/grub/files/0019-disk-cryptodisk-Fix-potential-integer-overflow.patch diff --git a/meta/recipes-bsp/grub/files/0019-disk-cryptodisk-Fix-potential-integer-overflow.patch b/meta/recipes-bsp/grub/files/0019-disk-cryptodisk-Fix-potential-integer-overflow.patch new file mode 100644 index 0000000000..dd7fda357d --- /dev/null +++ b/meta/recipes-bsp/grub/files/0019-disk-cryptodisk-Fix-potential-integer-overflow.patch @@ -0,0 +1,50 @@ +From 2550aaa0c23fdf8b6c54e00c6b838f2e3aa81fe2 Mon Sep 17 00:00:00 2001 +From: Darren Kenny <darren.ke...@oracle.com> +Date: Thu, 21 Jan 2021 11:38:31 +0000 +Subject: [PATCH] disk/cryptodisk: Fix potential integer overflow + +The encrypt and decrypt functions expect a grub_size_t. So, we need to +ensure that the constant bit shift is using grub_size_t rather than +unsigned int when it is performing the shift. + +Fixes: CID 307788 + +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=a201ad17caa430aa710654fdf2e6ab4c8166f031] +Signed-off-by: Marta Rybczynska <marta.rybczyn...@huawei.com> +--- + grub-core/disk/cryptodisk.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c +index 5037768..6883f48 100644 +--- a/grub-core/disk/cryptodisk.c ++++ b/grub-core/disk/cryptodisk.c +@@ -311,10 +311,10 @@ grub_cryptodisk_endecrypt (struct grub_cryptodisk *dev, + case GRUB_CRYPTODISK_MODE_CBC: + if (do_encrypt) + err = grub_crypto_cbc_encrypt (dev->cipher, data + i, data + i, +- (1U << dev->log_sector_size), iv); ++ ((grub_size_t) 1 << dev->log_sector_size), iv); + else + err = grub_crypto_cbc_decrypt (dev->cipher, data + i, data + i, +- (1U << dev->log_sector_size), iv); ++ ((grub_size_t) 1 << dev->log_sector_size), iv); + if (err) + return err; + break; +@@ -322,10 +322,10 @@ grub_cryptodisk_endecrypt (struct grub_cryptodisk *dev, + case GRUB_CRYPTODISK_MODE_PCBC: + if (do_encrypt) + err = grub_crypto_pcbc_encrypt (dev->cipher, data + i, data + i, +- (1U << dev->log_sector_size), iv); ++ ((grub_size_t) 1 << dev->log_sector_size), iv); + else + err = grub_crypto_pcbc_decrypt (dev->cipher, data + i, data + i, +- (1U << dev->log_sector_size), iv); ++ ((grub_size_t) 1 << dev->log_sector_size), iv); + if (err) + return err; + break; diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc index 2fccdc2d62..130f32551b 100644 --- a/meta/recipes-bsp/grub/grub2.inc +++ b/meta/recipes-bsp/grub/grub2.inc @@ -65,6 +65,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \ file://0016-disk-ldm-Make-sure-comp-data-is-freed-before-exiting.patch \ file://0017-disk-ldm-If-failed-then-free-vg-variable-too.patch \ file://0018-disk-ldm-Fix-memory-leak-on-uninserted-lv-references.patch \ + file://0019-disk-cryptodisk-Fix-potential-integer-overflow.patch \ " SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934" SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea" -- 2.25.1
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