|
 |
8631a2 |
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
|
8631a2 |
From: Andrei Borzenkov <arvidjaar@gmail.com>
|
|
|
8631a2 |
Date: Wed, 16 May 2018 13:06:04 -0400
|
|
|
8631a2 |
Subject: [PATCH] efi/uga: use 64 bit for fb_base
|
|
|
8631a2 |
|
|
|
8631a2 |
We get 64 bit from PCI BAR but then truncate by assigning to 32 bit.
|
|
|
8631a2 |
Make sure to check that pointer does not overflow on 32 bit platform.
|
|
|
8631a2 |
|
|
|
8631a2 |
Closes: 50931
|
|
|
8631a2 |
---
|
|
|
8631a2 |
grub-core/video/efi_uga.c | 31 ++++++++++++++++---------------
|
|
|
8631a2 |
1 file changed, 16 insertions(+), 15 deletions(-)
|
|
|
8631a2 |
|
|
|
8631a2 |
diff --git a/grub-core/video/efi_uga.c b/grub-core/video/efi_uga.c
|
|
|
09e3cc |
index 044af1d20..97a607c01 100644
|
|
|
8631a2 |
--- a/grub-core/video/efi_uga.c
|
|
|
8631a2 |
+++ b/grub-core/video/efi_uga.c
|
|
|
8631a2 |
@@ -34,7 +34,7 @@ GRUB_MOD_LICENSE ("GPLv3+");
|
|
|
8631a2 |
|
|
|
8631a2 |
static grub_efi_guid_t uga_draw_guid = GRUB_EFI_UGA_DRAW_GUID;
|
|
|
8631a2 |
static struct grub_efi_uga_draw_protocol *uga;
|
|
|
8631a2 |
-static grub_uint32_t uga_fb;
|
|
|
8631a2 |
+static grub_uint64_t uga_fb;
|
|
|
8631a2 |
static grub_uint32_t uga_pitch;
|
|
|
8631a2 |
|
|
|
8631a2 |
static struct
|
|
|
8631a2 |
@@ -52,7 +52,7 @@ static struct
|
|
|
8631a2 |
#define FBTEST_COUNT 8
|
|
|
8631a2 |
|
|
|
8631a2 |
static int
|
|
|
8631a2 |
-find_line_len (grub_uint32_t *fb_base, grub_uint32_t *line_len)
|
|
|
8631a2 |
+find_line_len (grub_uint64_t *fb_base, grub_uint32_t *line_len)
|
|
|
8631a2 |
{
|
|
|
8631a2 |
grub_uint32_t *base = (grub_uint32_t *) (grub_addr_t) *fb_base;
|
|
|
8631a2 |
int i;
|
|
|
8631a2 |
@@ -67,7 +67,7 @@ find_line_len (grub_uint32_t *fb_base, grub_uint32_t *line_len)
|
|
|
8631a2 |
{
|
|
|
8631a2 |
if ((base[j] & RGB_MASK) == RGB_MAGIC)
|
|
|
8631a2 |
{
|
|
|
8631a2 |
- *fb_base = (grub_uint32_t) (grub_addr_t) base;
|
|
|
8631a2 |
+ *fb_base = (grub_uint64_t) (grub_addr_t) base;
|
|
|
8631a2 |
*line_len = j << 2;
|
|
|
8631a2 |
|
|
|
8631a2 |
return 1;
|
|
|
8631a2 |
@@ -84,7 +84,7 @@ find_line_len (grub_uint32_t *fb_base, grub_uint32_t *line_len)
|
|
|
8631a2 |
/* Context for find_framebuf. */
|
|
|
8631a2 |
struct find_framebuf_ctx
|
|
|
8631a2 |
{
|
|
|
8631a2 |
- grub_uint32_t *fb_base;
|
|
|
8631a2 |
+ grub_uint64_t *fb_base;
|
|
|
8631a2 |
grub_uint32_t *line_len;
|
|
|
8631a2 |
int found;
|
|
|
8631a2 |
};
|
|
|
8631a2 |
@@ -129,7 +129,9 @@ find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data)
|
|
|
8631a2 |
if (i == 5)
|
|
|
8631a2 |
break;
|
|
|
8631a2 |
|
|
|
8631a2 |
- old_bar2 = grub_pci_read (addr + 4);
|
|
|
8631a2 |
+ i++;
|
|
|
8631a2 |
+ addr += 4;
|
|
|
8631a2 |
+ old_bar2 = grub_pci_read (addr);
|
|
|
8631a2 |
}
|
|
|
8631a2 |
else
|
|
|
8631a2 |
old_bar2 = 0;
|
|
|
8631a2 |
@@ -138,10 +140,15 @@ find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data)
|
|
|
8631a2 |
base64 <<= 32;
|
|
|
8631a2 |
base64 |= (old_bar1 & GRUB_PCI_ADDR_MEM_MASK);
|
|
|
8631a2 |
|
|
|
8631a2 |
- grub_dprintf ("fb", "%s(%d): 0x%llx\n",
|
|
|
8631a2 |
+ grub_dprintf ("fb", "%s(%d): 0x%" PRIxGRUB_UINT64_T "\n",
|
|
|
8631a2 |
((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) ?
|
|
|
8631a2 |
- "VMEM" : "MMIO"), i,
|
|
|
8631a2 |
- (unsigned long long) base64);
|
|
|
8631a2 |
+ "VMEM" : "MMIO"), type == GRUB_PCI_ADDR_MEM_TYPE_64 ? i - 1 : i,
|
|
|
8631a2 |
+ base64);
|
|
|
8631a2 |
+
|
|
|
8631a2 |
+#if GRUB_CPU_SIZEOF_VOID_P == 4
|
|
|
8631a2 |
+ if (old_bar2)
|
|
|
8631a2 |
+ continue;
|
|
|
8631a2 |
+#endif
|
|
|
8631a2 |
|
|
|
8631a2 |
if ((old_bar1 & GRUB_PCI_ADDR_MEM_PREFETCH) && (! ctx->found))
|
|
|
8631a2 |
{
|
|
|
8631a2 |
@@ -149,12 +156,6 @@ find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data)
|
|
|
8631a2 |
if (find_line_len (ctx->fb_base, ctx->line_len))
|
|
|
8631a2 |
ctx->found++;
|
|
|
8631a2 |
}
|
|
|
8631a2 |
-
|
|
|
8631a2 |
- if (type == GRUB_PCI_ADDR_MEM_TYPE_64)
|
|
|
8631a2 |
- {
|
|
|
8631a2 |
- i++;
|
|
|
8631a2 |
- addr += 4;
|
|
|
8631a2 |
- }
|
|
|
8631a2 |
}
|
|
|
8631a2 |
}
|
|
|
8631a2 |
|
|
|
8631a2 |
@@ -162,7 +163,7 @@ find_card (grub_pci_device_t dev, grub_pci_id_t pciid, void *data)
|
|
|
8631a2 |
}
|
|
|
8631a2 |
|
|
|
8631a2 |
static int
|
|
|
8631a2 |
-find_framebuf (grub_uint32_t *fb_base, grub_uint32_t *line_len)
|
|
|
8631a2 |
+find_framebuf (grub_uint64_t *fb_base, grub_uint32_t *line_len)
|
|
|
8631a2 |
{
|
|
|
8631a2 |
struct find_framebuf_ctx ctx = {
|
|
|
8631a2 |
.fb_base = fb_base,
|