new file mode 100644
@@ -0,0 +1,115 @@
+From 1f511ae054fe42dce7aedfbfe0f234fa1e0a7a3e Mon Sep 17 00:00:00 2001
+From: Zhang Boyang <zhangboyang.id@gmail.com>
+Date: Fri, 5 Aug 2022 00:51:20 +0800
+Subject: [PATCH] font: Fix size overflow in grub_font_get_glyph_internal()
+
+The length of memory allocation and file read may overflow. This patch
+fixes the problem by using safemath macros.
+
+There is a lot of code repetition like "(x * y + 7) / 8". It is unsafe
+if overflow happens. This patch introduces grub_video_bitmap_calc_1bpp_bufsz().
+It is safe replacement for such code. It has safemath-like prototype.
+
+This patch also introduces grub_cast(value, pointer), it casts value to
+typeof(*pointer) then store the value to *pointer. It returns true when
+overflow occurs or false if there is no overflow. The semantics of arguments
+and return value are designed to be consistent with other safemath macros.
+
+Signed-off-by: Zhang Boyang <zhangboyang.id@gmail.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+Upstream-Status: Backport from
+[https://git.savannah.gnu.org/cgit/grub.git/commit/?id=9c76ec09ae08155df27cd237eaea150b4f02f532]
+
+Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
+
+---
+ grub-core/font/font.c | 17 +++++++++++++----
+ include/grub/bitmap.h | 18 ++++++++++++++++++
+ include/grub/safemath.h | 2 ++
+ 3 files changed, 33 insertions(+), 4 deletions(-)
+
+diff --git a/grub-core/font/font.c b/grub-core/font/font.c
+index d09bb38..876b5b6 100644
+--- a/grub-core/font/font.c
++++ b/grub-core/font/font.c
+@@ -739,7 +739,8 @@ grub_font_get_glyph_internal (grub_font_t font, grub_uint32_t code)
+ grub_int16_t xoff;
+ grub_int16_t yoff;
+ grub_int16_t dwidth;
+- int len;
++ grub_ssize_t len;
++ grub_size_t sz;
+
+ if (index_entry->glyph)
+ /* Return cached glyph. */
+@@ -766,9 +767,17 @@ grub_font_get_glyph_internal (grub_font_t font, grub_uint32_t code)
+ return 0;
+ }
+
+- len = (width * height + 7) / 8;
+- glyph = grub_malloc (sizeof (struct grub_font_glyph) + len);
+- if (!glyph)
++ /* Calculate real struct size of current glyph. */
++ if (grub_video_bitmap_calc_1bpp_bufsz (width, height, &len) ||
++ grub_add (sizeof (struct grub_font_glyph), len, &sz))
++ {
++ remove_font (font);
++ return 0;
++ }
++
++ /* Allocate and initialize the glyph struct. */
++ glyph = grub_malloc (sz);
++ if (glyph == NULL)
+ {
+ remove_font (font);
+ return 0;
+diff --git a/include/grub/bitmap.h b/include/grub/bitmap.h
+index 5728f8c..0d9603f 100644
+--- a/include/grub/bitmap.h
++++ b/include/grub/bitmap.h
+@@ -23,6 +23,7 @@
+ #include <grub/symbol.h>
+ #include <grub/types.h>
+ #include <grub/video.h>
++#include <grub/safemath.h>
+
+ struct grub_video_bitmap
+ {
+@@ -79,6 +80,23 @@ grub_video_bitmap_get_height (struct grub_video_bitmap *bitmap)
+ return bitmap->mode_info.height;
+ }
+
++/*
++ * Calculate and store the size of data buffer of 1bit bitmap in result.
++ * Equivalent to "*result = (width * height + 7) / 8" if no overflow occurs.
++ * Return true when overflow occurs or false if there is no overflow.
++ * This function is intentionally implemented as a macro instead of
++ * an inline function. Although a bit awkward, it preserves data types for
++ * safemath macros and reduces macro side effects as much as possible.
++ *
++ * XXX: Will report false overflow if width * height > UINT64_MAX.
++ */
++#define grub_video_bitmap_calc_1bpp_bufsz(width, height, result) \
++({ \
++ grub_uint64_t _bitmap_pixels; \
++ grub_mul ((width), (height), &_bitmap_pixels) ? 1 : \
++ grub_cast (_bitmap_pixels / GRUB_CHAR_BIT + !!(_bitmap_pixels % GRUB_CHAR_BIT), (result)); \
++})
++
+ void EXPORT_FUNC (grub_video_bitmap_get_mode_info) (struct grub_video_bitmap *bitmap,
+ struct grub_video_mode_info *mode_info);
+
+diff --git a/include/grub/safemath.h b/include/grub/safemath.h
+index c17b89b..bb0f826 100644
+--- a/include/grub/safemath.h
++++ b/include/grub/safemath.h
+@@ -30,6 +30,8 @@
+ #define grub_sub(a, b, res) __builtin_sub_overflow(a, b, res)
+ #define grub_mul(a, b, res) __builtin_mul_overflow(a, b, res)
+
++#define grub_cast(a, res) grub_add ((a), 0, (res))
++
+ #else
+ #error gcc 5.1 or newer or clang 3.8 or newer is required
+ #endif
new file mode 100644
@@ -0,0 +1,85 @@
+From e8060722acf0bcca037982d7fb29472363ccdfd4 Mon Sep 17 00:00:00 2001
+From: Zhang Boyang <zhangboyang.id@gmail.com>
+Date: Fri, 5 Aug 2022 01:58:27 +0800
+Subject: [PATCH] font: Fix several integer overflows in
+ grub_font_construct_glyph()
+
+This patch fixes several integer overflows in grub_font_construct_glyph().
+Glyphs of invalid size, zero or leading to an overflow, are rejected.
+The inconsistency between "glyph" and "max_glyph_size" when grub_malloc()
+returns NULL is fixed too.
+
+Fixes: CVE-2022-2601
+
+Reported-by: Zhang Boyang <zhangboyang.id@gmail.com>
+Signed-off-by: Zhang Boyang <zhangboyang.id@gmail.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+Upstream-Status: Backport from
+[https://git.savannah.gnu.org/cgit/grub.git/commit/?id=768e1ef2fc159f6e14e7246e4be09363708ac39e]
+CVE: CVE-2022-2601
+
+Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
+
+---
+ grub-core/font/font.c | 29 +++++++++++++++++------------
+ 1 file changed, 17 insertions(+), 12 deletions(-)
+
+diff --git a/grub-core/font/font.c b/grub-core/font/font.c
+index 876b5b6..0ff5525 100644
+--- a/grub-core/font/font.c
++++ b/grub-core/font/font.c
+@@ -1515,6 +1515,7 @@ grub_font_construct_glyph (grub_font_t hinted_font,
+ struct grub_video_signed_rect bounds;
+ static struct grub_font_glyph *glyph = 0;
+ static grub_size_t max_glyph_size = 0;
++ grub_size_t cur_glyph_size;
+
+ ensure_comb_space (glyph_id);
+
+@@ -1531,29 +1532,33 @@ grub_font_construct_glyph (grub_font_t hinted_font,
+ if (!glyph_id->ncomb && !glyph_id->attributes)
+ return main_glyph;
+
+- if (max_glyph_size < sizeof (*glyph) + (bounds.width * bounds.height + GRUB_CHAR_BIT - 1) / GRUB_CHAR_BIT)
++ if (grub_video_bitmap_calc_1bpp_bufsz (bounds.width, bounds.height, &cur_glyph_size) ||
++ grub_add (sizeof (*glyph), cur_glyph_size, &cur_glyph_size))
++ return main_glyph;
++
++ if (max_glyph_size < cur_glyph_size)
+ {
+ grub_free (glyph);
+- max_glyph_size = (sizeof (*glyph) + (bounds.width * bounds.height + GRUB_CHAR_BIT - 1) / GRUB_CHAR_BIT) * 2;
+- if (max_glyph_size < 8)
+- max_glyph_size = 8;
+- glyph = grub_malloc (max_glyph_size);
++ if (grub_mul (cur_glyph_size, 2, &max_glyph_size))
++ max_glyph_size = 0;
++ glyph = max_glyph_size > 0 ? grub_malloc (max_glyph_size) : NULL;
+ }
+ if (!glyph)
+ {
++ max_glyph_size = 0;
+ grub_errno = GRUB_ERR_NONE;
+ return main_glyph;
+ }
+
+- grub_memset (glyph, 0, sizeof (*glyph)
+- + (bounds.width * bounds.height
+- + GRUB_CHAR_BIT - 1) / GRUB_CHAR_BIT);
++ grub_memset (glyph, 0, cur_glyph_size);
+
+ glyph->font = main_glyph->font;
+- glyph->width = bounds.width;
+- glyph->height = bounds.height;
+- glyph->offset_x = bounds.x;
+- glyph->offset_y = bounds.y;
++ if (bounds.width == 0 || bounds.height == 0 ||
++ grub_cast (bounds.width, &glyph->width) ||
++ grub_cast (bounds.height, &glyph->height) ||
++ grub_cast (bounds.x, &glyph->offset_x) ||
++ grub_cast (bounds.y, &glyph->offset_y))
++ return main_glyph;
+
+ if (glyph_id->attributes & GRUB_UNICODE_GLYPH_ATTRIBUTE_MIRROR)
+ grub_font_blit_glyph_mirror (glyph, main_glyph,
new file mode 100644
@@ -0,0 +1,95 @@
+From fdbe7209152ad6f09a1166f64f162017f2145ba3 Mon Sep 17 00:00:00 2001
+From: Zhang Boyang <zhangboyang.id@gmail.com>
+Date: Mon, 24 Oct 2022 08:05:35 +0800
+Subject: [PATCH] font: Fix an integer underflow in blit_comb()
+
+The expression (ctx.bounds.height - combining_glyphs[i]->height) / 2 may
+evaluate to a very big invalid value even if both ctx.bounds.height and
+combining_glyphs[i]->height are small integers. For example, if
+ctx.bounds.height is 10 and combining_glyphs[i]->height is 12, this
+expression evaluates to 2147483647 (expected -1). This is because
+coordinates are allowed to be negative but ctx.bounds.height is an
+unsigned int. So, the subtraction operates on unsigned ints and
+underflows to a very big value. The division makes things even worse.
+The quotient is still an invalid value even if converted back to int.
+
+This patch fixes the problem by casting ctx.bounds.height to int. As
+a result the subtraction will operate on int and grub_uint16_t which
+will be promoted to an int. So, the underflow will no longer happen. Other
+uses of ctx.bounds.height (and ctx.bounds.width) are also casted to int,
+to ensure coordinates are always calculated on signed integers.
+
+Fixes: CVE-2022-3775
+
+Reported-by: Daniel Axtens <dja@axtens.net>
+Signed-off-by: Zhang Boyang <zhangboyang.id@gmail.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+Upstream-Status: Backport from
+[https://git.savannah.gnu.org/cgit/grub.git/commit/?id=992c06191babc1e109caf40d6a07ec6fdef427af]
+CVE: CVE-2022-3775
+
+Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
+
+---
+ grub-core/font/font.c | 16 ++++++++--------
+ 1 file changed, 8 insertions(+), 8 deletions(-)
+
+diff --git a/grub-core/font/font.c b/grub-core/font/font.c
+index 0ff5525..7b1cbde 100644
+--- a/grub-core/font/font.c
++++ b/grub-core/font/font.c
+@@ -1206,12 +1206,12 @@ blit_comb (const struct grub_unicode_glyph *glyph_id,
+ ctx.bounds.height = main_glyph->height;
+
+ above_rightx = main_glyph->offset_x + main_glyph->width;
+- above_righty = ctx.bounds.y + ctx.bounds.height;
++ above_righty = ctx.bounds.y + (int) ctx.bounds.height;
+
+ above_leftx = main_glyph->offset_x;
+- above_lefty = ctx.bounds.y + ctx.bounds.height;
++ above_lefty = ctx.bounds.y + (int) ctx.bounds.height;
+
+- below_rightx = ctx.bounds.x + ctx.bounds.width;
++ below_rightx = ctx.bounds.x + (int) ctx.bounds.width;
+ below_righty = ctx.bounds.y;
+
+ comb = grub_unicode_get_comb (glyph_id);
+@@ -1224,7 +1224,7 @@ blit_comb (const struct grub_unicode_glyph *glyph_id,
+
+ if (!combining_glyphs[i])
+ continue;
+- targetx = (ctx.bounds.width - combining_glyphs[i]->width) / 2 + ctx.bounds.x;
++ targetx = ((int) ctx.bounds.width - combining_glyphs[i]->width) / 2 + ctx.bounds.x;
+ /* CGJ is to avoid diacritics reordering. */
+ if (comb[i].code
+ == GRUB_UNICODE_COMBINING_GRAPHEME_JOINER)
+@@ -1234,8 +1234,8 @@ blit_comb (const struct grub_unicode_glyph *glyph_id,
+ case GRUB_UNICODE_COMB_OVERLAY:
+ do_blit (combining_glyphs[i],
+ targetx,
+- (ctx.bounds.height - combining_glyphs[i]->height) / 2
+- - (ctx.bounds.height + ctx.bounds.y), &ctx);
++ ((int) ctx.bounds.height - combining_glyphs[i]->height) / 2
++ - ((int) ctx.bounds.height + ctx.bounds.y), &ctx);
+ if (min_devwidth < combining_glyphs[i]->width)
+ min_devwidth = combining_glyphs[i]->width;
+ break;
+@@ -1308,7 +1308,7 @@ blit_comb (const struct grub_unicode_glyph *glyph_id,
+ /* Fallthrough. */
+ case GRUB_UNICODE_STACK_ATTACHED_ABOVE:
+ do_blit (combining_glyphs[i], targetx,
+- -(ctx.bounds.height + ctx.bounds.y + space
++ -((int) ctx.bounds.height + ctx.bounds.y + space
+ + combining_glyphs[i]->height), &ctx);
+ if (min_devwidth < combining_glyphs[i]->width)
+ min_devwidth = combining_glyphs[i]->width;
+@@ -1316,7 +1316,7 @@ blit_comb (const struct grub_unicode_glyph *glyph_id,
+
+ case GRUB_UNICODE_COMB_HEBREW_DAGESH:
+ do_blit (combining_glyphs[i], targetx,
+- -(ctx.bounds.height / 2 + ctx.bounds.y
++ -((int) ctx.bounds.height / 2 + ctx.bounds.y
+ + combining_glyphs[i]->height / 2), &ctx);
+ if (min_devwidth < combining_glyphs[i]->width)
+ min_devwidth = combining_glyphs[i]->width;
@@ -32,6 +32,9 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \
file://CVE-2022-28734-net-http-Fix-OOB-write-for-split-http-headers.patch \
file://CVE-2022-28734-net-http-Error-out-on-headers-with-LF-without-CR.patch \
file://CVE-2022-28735-kern-efi-sb-Reject-non-kernel-files-in-the-shim_lock.patch \
+ file://0001-font-Fix-size-overflow-in-grub_font_get_glyph_intern.patch \
+ file://CVE-2022-2601.patch \
+ file://CVE-2022-3775.patch \
"
SRC_URI[sha256sum] = "23b64b4c741569f9426ed2e3d0e6780796fca081bee4c99f62aa3f53ae803f5f"