mirror of
https://git.proxmox.com/git/grub2
synced 2025-10-31 19:15:14 +00:00
f725fa7cb2
This modifies most of the places we do some form of:
X = malloc(Y * Z);
to use calloc(Y, Z) instead.
Among other issues, this fixes:
- allocation of integer overflow in grub_png_decode_image_header()
reported by Chris Coulson,
- allocation of integer overflow in luks_recover_key()
reported by Chris Coulson,
- allocation of integer overflow in grub_lvm_detect()
reported by Chris Coulson.
Fixes: CVE-2020-14308
Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
221 lines
6.5 KiB
C
221 lines
6.5 KiB
C
/* search.c - search devices based on a file or a filesystem label */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2005,2007,2008,2009 Free Software Foundation, Inc.
|
|
*
|
|
* GRUB is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GRUB is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <grub/types.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/err.h>
|
|
#include <grub/dl.h>
|
|
#include <grub/env.h>
|
|
#include <grub/extcmd.h>
|
|
#include <grub/search.h>
|
|
#include <grub/i18n.h>
|
|
|
|
GRUB_MOD_LICENSE ("GPLv3+");
|
|
|
|
static const struct grub_arg_option options[] =
|
|
{
|
|
{"file", 'f', 0, N_("Search devices by a file."), 0, 0},
|
|
{"label", 'l', 0, N_("Search devices by a filesystem label."),
|
|
0, 0},
|
|
{"fs-uuid", 'u', 0, N_("Search devices by a filesystem UUID."),
|
|
0, 0},
|
|
{"set", 's', GRUB_ARG_OPTION_OPTIONAL,
|
|
N_("Set a variable to the first device found."), N_("VARNAME"),
|
|
ARG_TYPE_STRING},
|
|
{"no-floppy", 'n', 0, N_("Do not probe any floppy drive."), 0, 0},
|
|
{"hint", 'h', GRUB_ARG_OPTION_REPEATABLE,
|
|
N_("First try the device HINT. If HINT ends in comma, "
|
|
"also try subpartitions"), N_("HINT"), ARG_TYPE_STRING},
|
|
{"hint-ieee1275", 0, GRUB_ARG_OPTION_REPEATABLE,
|
|
N_("First try the device HINT if currently running on IEEE1275. "
|
|
"If HINT ends in comma, also try subpartitions"),
|
|
N_("HINT"), ARG_TYPE_STRING},
|
|
{"hint-bios", 0, GRUB_ARG_OPTION_REPEATABLE,
|
|
N_("First try the device HINT if currently running on BIOS. "
|
|
"If HINT ends in comma, also try subpartitions"),
|
|
N_("HINT"), ARG_TYPE_STRING},
|
|
{"hint-baremetal", 0, GRUB_ARG_OPTION_REPEATABLE,
|
|
N_("First try the device HINT if direct hardware access is supported. "
|
|
"If HINT ends in comma, also try subpartitions"),
|
|
N_("HINT"), ARG_TYPE_STRING},
|
|
{"hint-efi", 0, GRUB_ARG_OPTION_REPEATABLE,
|
|
N_("First try the device HINT if currently running on EFI. "
|
|
"If HINT ends in comma, also try subpartitions"),
|
|
N_("HINT"), ARG_TYPE_STRING},
|
|
{"hint-arc", 0, GRUB_ARG_OPTION_REPEATABLE,
|
|
N_("First try the device HINT if currently running on ARC."
|
|
" If HINT ends in comma, also try subpartitions"),
|
|
N_("HINT"), ARG_TYPE_STRING},
|
|
{0, 0, 0, 0, 0, 0}
|
|
};
|
|
|
|
enum options
|
|
{
|
|
SEARCH_FILE,
|
|
SEARCH_LABEL,
|
|
SEARCH_FS_UUID,
|
|
SEARCH_SET,
|
|
SEARCH_NO_FLOPPY,
|
|
SEARCH_HINT,
|
|
SEARCH_HINT_IEEE1275,
|
|
SEARCH_HINT_BIOS,
|
|
SEARCH_HINT_BAREMETAL,
|
|
SEARCH_HINT_EFI,
|
|
SEARCH_HINT_ARC,
|
|
};
|
|
|
|
static grub_err_t
|
|
grub_cmd_search (grub_extcmd_context_t ctxt, int argc, char **args)
|
|
{
|
|
struct grub_arg_list *state = ctxt->state;
|
|
const char *var = 0;
|
|
const char *id = 0;
|
|
int i = 0, j = 0, nhints = 0;
|
|
char **hints = NULL;
|
|
|
|
if (state[SEARCH_HINT].set)
|
|
for (i = 0; state[SEARCH_HINT].args[i]; i++)
|
|
nhints++;
|
|
|
|
#ifdef GRUB_MACHINE_IEEE1275
|
|
if (state[SEARCH_HINT_IEEE1275].set)
|
|
for (i = 0; state[SEARCH_HINT_IEEE1275].args[i]; i++)
|
|
nhints++;
|
|
#endif
|
|
|
|
#ifdef GRUB_MACHINE_EFI
|
|
if (state[SEARCH_HINT_EFI].set)
|
|
for (i = 0; state[SEARCH_HINT_EFI].args[i]; i++)
|
|
nhints++;
|
|
#endif
|
|
|
|
#ifdef GRUB_MACHINE_PCBIOS
|
|
if (state[SEARCH_HINT_BIOS].set)
|
|
for (i = 0; state[SEARCH_HINT_BIOS].args[i]; i++)
|
|
nhints++;
|
|
#endif
|
|
|
|
#ifdef GRUB_MACHINE_ARC
|
|
if (state[SEARCH_HINT_ARC].set)
|
|
for (i = 0; state[SEARCH_HINT_ARC].args[i]; i++)
|
|
nhints++;
|
|
#endif
|
|
|
|
if (state[SEARCH_HINT_BAREMETAL].set)
|
|
for (i = 0; state[SEARCH_HINT_BAREMETAL].args[i]; i++)
|
|
nhints++;
|
|
|
|
hints = grub_calloc (nhints, sizeof (hints[0]));
|
|
if (!hints)
|
|
return grub_errno;
|
|
j = 0;
|
|
|
|
if (state[SEARCH_HINT].set)
|
|
for (i = 0; state[SEARCH_HINT].args[i]; i++)
|
|
hints[j++] = state[SEARCH_HINT].args[i];
|
|
|
|
#ifdef GRUB_MACHINE_IEEE1275
|
|
if (state[SEARCH_HINT_IEEE1275].set)
|
|
for (i = 0; state[SEARCH_HINT_IEEE1275].args[i]; i++)
|
|
hints[j++] = state[SEARCH_HINT_IEEE1275].args[i];
|
|
#endif
|
|
|
|
#ifdef GRUB_MACHINE_EFI
|
|
if (state[SEARCH_HINT_EFI].set)
|
|
for (i = 0; state[SEARCH_HINT_EFI].args[i]; i++)
|
|
hints[j++] = state[SEARCH_HINT_EFI].args[i];
|
|
#endif
|
|
|
|
#ifdef GRUB_MACHINE_ARC
|
|
if (state[SEARCH_HINT_ARC].set)
|
|
for (i = 0; state[SEARCH_HINT_ARC].args[i]; i++)
|
|
hints[j++] = state[SEARCH_HINT_ARC].args[i];
|
|
#endif
|
|
|
|
#ifdef GRUB_MACHINE_PCBIOS
|
|
if (state[SEARCH_HINT_BIOS].set)
|
|
for (i = 0; state[SEARCH_HINT_BIOS].args[i]; i++)
|
|
hints[j++] = state[SEARCH_HINT_BIOS].args[i];
|
|
#endif
|
|
|
|
if (state[SEARCH_HINT_BAREMETAL].set)
|
|
for (i = 0; state[SEARCH_HINT_BAREMETAL].args[i]; i++)
|
|
hints[j++] = state[SEARCH_HINT_BAREMETAL].args[i];
|
|
|
|
/* Skip hints for future platforms. */
|
|
for (j = 0; j < argc; j++)
|
|
if (grub_memcmp (args[j], "--hint-", sizeof ("--hint-") - 1) != 0)
|
|
break;
|
|
|
|
if (state[SEARCH_SET].set)
|
|
var = state[SEARCH_SET].arg ? state[SEARCH_SET].arg : "root";
|
|
|
|
if (argc != j)
|
|
id = args[j];
|
|
else if (state[SEARCH_SET].set && state[SEARCH_SET].arg)
|
|
{
|
|
id = state[SEARCH_SET].arg;
|
|
var = "root";
|
|
}
|
|
else
|
|
{
|
|
grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
|
|
goto out;
|
|
}
|
|
|
|
if (state[SEARCH_LABEL].set)
|
|
grub_search_label (id, var, state[SEARCH_NO_FLOPPY].set,
|
|
hints, nhints);
|
|
else if (state[SEARCH_FS_UUID].set)
|
|
grub_search_fs_uuid (id, var, state[SEARCH_NO_FLOPPY].set,
|
|
hints, nhints);
|
|
else if (state[SEARCH_FILE].set)
|
|
grub_search_fs_file (id, var, state[SEARCH_NO_FLOPPY].set,
|
|
hints, nhints);
|
|
else
|
|
grub_error (GRUB_ERR_INVALID_COMMAND, "unspecified search type");
|
|
|
|
out:
|
|
grub_free (hints);
|
|
return grub_errno;
|
|
}
|
|
|
|
static grub_extcmd_t cmd;
|
|
|
|
GRUB_MOD_INIT(search)
|
|
{
|
|
cmd =
|
|
grub_register_extcmd ("search", grub_cmd_search,
|
|
GRUB_COMMAND_FLAG_EXTRACTOR | GRUB_COMMAND_ACCEPT_DASH,
|
|
N_("[-f|-l|-u|-s|-n] [--hint HINT [--hint HINT] ...]"
|
|
" NAME"),
|
|
N_("Search devices by file, filesystem label"
|
|
" or filesystem UUID."
|
|
" If --set is specified, the first device found is"
|
|
" set to a variable. If no variable name is"
|
|
" specified, `root' is used."),
|
|
options);
|
|
}
|
|
|
|
GRUB_MOD_FINI(search)
|
|
{
|
|
grub_unregister_extcmd (cmd);
|
|
}
|