diff options
Diffstat (limited to 'meta/recipes-bsp/grub/files/0023-zfs-Fix-possible-integer-overflows.patch')
-rw-r--r-- | meta/recipes-bsp/grub/files/0023-zfs-Fix-possible-integer-overflows.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/meta/recipes-bsp/grub/files/0023-zfs-Fix-possible-integer-overflows.patch b/meta/recipes-bsp/grub/files/0023-zfs-Fix-possible-integer-overflows.patch new file mode 100644 index 0000000000..8df758b41f --- /dev/null +++ b/meta/recipes-bsp/grub/files/0023-zfs-Fix-possible-integer-overflows.patch @@ -0,0 +1,56 @@ +From ec35d862f3567671048aa0d0d8ad1ded1fd25336 Mon Sep 17 00:00:00 2001 +From: Darren Kenny <darren.kenny@oracle.com> +Date: Tue, 8 Dec 2020 22:17:04 +0000 +Subject: [PATCH] zfs: Fix possible integer overflows + +In all cases the problem is that the value being acted upon by +a left-shift is a 32-bit number which is then being used in the +context of a 64-bit number. + +To avoid overflow we ensure that the number being shifted is 64-bit +before the shift is done. + +Fixes: CID 73684, CID 73695, CID 73764 + +Signed-off-by: Darren Kenny <darren.kenny@oracle.com> +Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> + +Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=302c12ff5714bc455949117c1c9548ccb324d55b] +Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com> +--- + grub-core/fs/zfs/zfs.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +diff --git a/grub-core/fs/zfs/zfs.c b/grub-core/fs/zfs/zfs.c +index 9087a72..b078ccc 100644 +--- a/grub-core/fs/zfs/zfs.c ++++ b/grub-core/fs/zfs/zfs.c +@@ -564,7 +564,7 @@ find_bestub (uberblock_phys_t * ub_array, + ubptr = (uberblock_phys_t *) ((grub_properly_aligned_t *) ub_array + + ((i << ub_shift) + / sizeof (grub_properly_aligned_t))); +- err = uberblock_verify (ubptr, offset, 1 << ub_shift); ++ err = uberblock_verify (ubptr, offset, (grub_size_t) 1 << ub_shift); + if (err) + { + grub_errno = GRUB_ERR_NONE; +@@ -1543,7 +1543,7 @@ read_device (grub_uint64_t offset, struct grub_zfs_device_desc *desc, + + high = grub_divmod64 ((offset >> desc->ashift) + c, + desc->n_children, &devn); +- csize = bsize << desc->ashift; ++ csize = (grub_size_t) bsize << desc->ashift; + if (csize > len) + csize = len; + +@@ -1635,8 +1635,8 @@ read_device (grub_uint64_t offset, struct grub_zfs_device_desc *desc, + + while (len > 0) + { +- grub_size_t csize; +- csize = ((s / (desc->n_children - desc->nparity)) ++ grub_size_t csize = s; ++ csize = ((csize / (desc->n_children - desc->nparity)) + << desc->ashift); + if (csize > len) + csize = len; |