46968b6e63
Resolves: CVE-2020-14372 Resolves: CVE-2020-25632 Resolves: CVE-2020-25647 Resolves: CVE-2020-27749 Resolves: CVE-2020-27779 Resolves: CVE-2021-20225 Resolves: CVE-2021-20233 Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
141 lines
3.4 KiB
Diff
141 lines
3.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Fri, 5 Sep 2014 10:07:04 -0400
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Subject: [PATCH] Allow "fallback" to include entries by title, not just
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number.
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Resolves: rhbz#1026084
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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grub-core/normal/menu.c | 85 +++++++++++++++++++++++++++++++++----------------
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1 file changed, 58 insertions(+), 27 deletions(-)
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diff --git a/grub-core/normal/menu.c b/grub-core/normal/menu.c
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index 8397886fa05..d7a222e681b 100644
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--- a/grub-core/normal/menu.c
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+++ b/grub-core/normal/menu.c
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@@ -163,15 +163,40 @@ grub_menu_set_timeout (int timeout)
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}
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}
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+static int
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+menuentry_eq (const char *id, const char *spec)
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+{
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+ const char *ptr1, *ptr2;
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+ ptr1 = id;
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+ ptr2 = spec;
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+ while (1)
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+ {
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+ if (*ptr2 == '>' && ptr2[1] != '>' && *ptr1 == 0)
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+ return ptr2 - spec;
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+ if (*ptr2 == '>' && ptr2[1] != '>')
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+ return 0;
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+ if (*ptr2 == '>')
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+ ptr2++;
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+ if (*ptr1 != *ptr2)
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+ return 0;
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+ if (*ptr1 == 0)
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+ return ptr1 - id;
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+ ptr1++;
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+ ptr2++;
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+ }
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+ return 0;
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+}
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+
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/* Get the first entry number from the value of the environment variable NAME,
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which is a space-separated list of non-negative integers. The entry number
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which is returned is stripped from the value of NAME. If no entry number
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can be found, -1 is returned. */
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static int
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-get_and_remove_first_entry_number (const char *name)
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+get_and_remove_first_entry_number (grub_menu_t menu, const char *name)
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{
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const char *val, *tail;
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int entry;
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+ int sz = 0;
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val = grub_env_get (name);
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if (! val)
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@@ -181,9 +206,39 @@ get_and_remove_first_entry_number (const char *name)
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entry = (int) grub_strtoul (val, &tail, 0);
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+ if (grub_errno == GRUB_ERR_BAD_NUMBER)
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+ {
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+ /* See if the variable matches the title of a menu entry. */
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+ grub_menu_entry_t e = menu->entry_list;
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+ int i;
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+
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+ for (i = 0; e; i++)
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+ {
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+ sz = menuentry_eq (e->title, val);
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+ if (sz < 1)
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+ sz = menuentry_eq (e->id, val);
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+
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+ if (sz >= 1)
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+ {
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+ entry = i;
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+ break;
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+ }
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+ e = e->next;
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+ }
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+
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+ if (sz > 0)
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+ grub_errno = GRUB_ERR_NONE;
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+
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+ if (! e)
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+ entry = -1;
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+ }
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+
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if (grub_errno == GRUB_ERR_NONE)
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{
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- /* Skip whitespace to find the next digit. */
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+ if (sz > 0)
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+ tail += sz;
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+
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+ /* Skip whitespace to find the next entry. */
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while (*tail && grub_isspace (*tail))
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tail++;
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grub_env_set (name, tail);
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@@ -346,7 +401,7 @@ grub_menu_execute_with_fallback (grub_menu_t menu,
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grub_menu_execute_entry (entry, 1);
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/* Deal with fallback entries. */
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- while ((fallback_entry = get_and_remove_first_entry_number ("fallback"))
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+ while ((fallback_entry = get_and_remove_first_entry_number (menu, "fallback"))
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>= 0)
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{
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grub_print_error ();
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@@ -464,30 +519,6 @@ grub_menu_register_viewer (struct grub_menu_viewer *viewer)
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viewers = viewer;
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}
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-static int
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-menuentry_eq (const char *id, const char *spec)
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-{
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- const char *ptr1, *ptr2;
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- ptr1 = id;
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- ptr2 = spec;
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- while (1)
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- {
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- if (*ptr2 == '>' && ptr2[1] != '>' && *ptr1 == 0)
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- return 1;
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- if (*ptr2 == '>' && ptr2[1] != '>')
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- return 0;
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- if (*ptr2 == '>')
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- ptr2++;
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- if (*ptr1 != *ptr2)
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- return 0;
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- if (*ptr1 == 0)
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- return 1;
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- ptr1++;
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- ptr2++;
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- }
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-}
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-
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-
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/* Get the entry number from the variable NAME. */
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static int
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get_entry_number (grub_menu_t menu, const char *name)
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