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https://src.fedoraproject.org/rpms/grub2.git
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3b94406a9e
CVE-2020-10713 CVE-2020-14308 CVE-2020-14309 CVE-2020-14310 CVE-2020-14311 CVE-2020-15705 CVE-2020-15706 CVE-2020-15707 Signed-off-by: Peter Jones <pjones@redhat.com>
51 lines
1.6 KiB
Diff
51 lines
1.6 KiB
Diff
From 396e9868fb2c0ee18780d61ecdafec58f179b9c1 Mon Sep 17 00:00:00 2001
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From: Colin Watson <cjwatson@debian.org>
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Date: Fri, 24 Jul 2020 17:18:09 +0100
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Subject: [PATCH 234/237] efilinux: Fix integer overflows in grub_cmd_initrd
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These could be triggered by an extremely large number of arguments to
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the initrd command on 32-bit architectures, or a crafted filesystem with
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very large files on any architecture.
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Signed-off-by: Colin Watson <cjwatson@debian.org>
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---
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grub-core/loader/i386/efi/linux.c | 9 +++++++--
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1 file changed, 7 insertions(+), 2 deletions(-)
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diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
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index 65d1b5cc034..2bd6663625d 100644
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--- a/grub-core/loader/i386/efi/linux.c
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+++ b/grub-core/loader/i386/efi/linux.c
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@@ -29,6 +29,7 @@
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#include <grub/efi/linux.h>
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#include <grub/tpm.h>
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#include <grub/cpu/efi/memory.h>
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+#include <grub/safemath.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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@@ -207,7 +208,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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goto fail;
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}
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- files = grub_zalloc (argc * sizeof (files[0]));
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+ files = grub_calloc (argc, sizeof (files[0]));
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if (!files)
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goto fail;
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@@ -218,7 +219,11 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
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if (! files[i])
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goto fail;
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nfiles++;
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- size += ALIGN_UP (grub_file_size (files[i]), 4);
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+ if (grub_add (size, ALIGN_UP (grub_file_size (files[i]), 4), &size))
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+ {
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+ grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));
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+ goto fail;
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+ }
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}
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initrd_mem = kernel_alloc(size, N_("can't allocate initrd"));
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--
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2.26.2
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