mirror of
https://src.fedoraproject.org/rpms/grub2.git
synced 2024-11-28 07:44:52 +00:00
97 lines
2.7 KiB
Diff
97 lines
2.7 KiB
Diff
From 4cee6969015be92d0a4371f4ccae7f36c6b80dc6 Mon Sep 17 00:00:00 2001
|
|
From: Matthew Garrett <mjg59@coreos.com>
|
|
Date: Tue, 14 Jul 2015 16:58:51 -0700
|
|
Subject: [PATCH 70/85] Fix race in EFI validation
|
|
|
|
---
|
|
grub-core/loader/i386/efi/linux.c | 44 ++++++++++-----------------------------
|
|
1 file changed, 11 insertions(+), 33 deletions(-)
|
|
|
|
diff --git a/grub-core/loader/i386/efi/linux.c b/grub-core/loader/i386/efi/linux.c
|
|
index e5b7785..7ccf32d 100644
|
|
--- a/grub-core/loader/i386/efi/linux.c
|
|
+++ b/grub-core/loader/i386/efi/linux.c
|
|
@@ -154,7 +154,7 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
grub_file_t file = 0;
|
|
struct linux_kernel_header lh;
|
|
grub_ssize_t len, start, filelen;
|
|
- void *kernel;
|
|
+ void *kernel = NULL;
|
|
|
|
grub_dl_ref (my_mod);
|
|
|
|
@@ -191,10 +191,6 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
goto fail;
|
|
}
|
|
|
|
- grub_file_seek (file, 0);
|
|
-
|
|
- grub_free(kernel);
|
|
-
|
|
params = grub_efi_allocate_pages_max (0x3fffffff, BYTES_TO_PAGES(16384));
|
|
|
|
if (! params)
|
|
@@ -203,15 +199,9 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
goto fail;
|
|
}
|
|
|
|
- memset (params, 0, 16384);
|
|
+ grub_memset (params, 0, 16384);
|
|
|
|
- if (grub_file_read (file, &lh, sizeof (lh)) != sizeof (lh))
|
|
- {
|
|
- if (!grub_errno)
|
|
- grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
|
|
- argv[0]);
|
|
- goto fail;
|
|
- }
|
|
+ grub_memcpy (&lh, kernel, sizeof (lh));
|
|
|
|
if (lh.boot_flag != grub_cpu_to_le16 (0xaa55))
|
|
{
|
|
@@ -271,27 +261,12 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
goto fail;
|
|
}
|
|
|
|
- if (grub_file_seek (file, start) == (grub_off_t) -1)
|
|
- {
|
|
- grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
|
|
- argv[0]);
|
|
- goto fail;
|
|
- }
|
|
+ grub_memcpy (kernel_mem, (char *)kernel + start, len);
|
|
+ grub_loader_set (grub_linuxefi_boot, grub_linuxefi_unload, 0);
|
|
+ loaded=1;
|
|
|
|
- if (grub_file_read (file, kernel_mem, len) != len && !grub_errno)
|
|
- {
|
|
- grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
|
|
- argv[0]);
|
|
- }
|
|
-
|
|
- if (grub_errno == GRUB_ERR_NONE)
|
|
- {
|
|
- grub_loader_set (grub_linuxefi_boot, grub_linuxefi_unload, 0);
|
|
- loaded = 1;
|
|
- lh.code32_start = (grub_uint32_t)(grub_uint64_t) kernel_mem;
|
|
- }
|
|
-
|
|
- memcpy(params, &lh, 2 * 512);
|
|
+ lh.code32_start = (grub_uint32_t)(grub_uint64_t) kernel_mem;
|
|
+ grub_memcpy (params, &lh, 2 * 512);
|
|
|
|
params->type_of_loader = 0x21;
|
|
|
|
@@ -300,6 +275,9 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
|
|
if (file)
|
|
grub_file_close (file);
|
|
|
|
+ if (kernel)
|
|
+ grub_free (kernel);
|
|
+
|
|
if (grub_errno != GRUB_ERR_NONE)
|
|
{
|
|
grub_dl_unref (my_mod);
|
|
--
|
|
2.5.0
|
|
|