From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Peter Jones <pjones@redhat.com>

Date: Thu, 23 Jul 2020 15:02:48 -0400

Subject: [PATCH] Fix up some types for gcc 4.8 compat safemath.h

The compat macros aren't as forgiving as __builtin_*_overflow().

Signed-off-by: Peter Jones <pjones@redhat.com>

---

 grub-core/disk/lvm.c       | 22 ++++++++++++----------

 grub-core/font/font.c      |  4 ++--

 grub-core/fs/btrfs.c       | 20 +++++++++++++++-----

 grub-core/fs/ext2.c        |  3 ++-

 grub-core/fs/hfsplus.c     |  2 +-

 grub-core/fs/iso9660.c     |  8 ++++----

 grub-core/normal/charset.c |  5 +++--

 7 files changed, 39 insertions(+), 25 deletions(-)

diff --git a/grub-core/disk/lvm.c b/grub-core/disk/lvm.c

index ca09d4699..4fbb3eac0 100644

--- a/grub-core/disk/lvm.c

+++ b/grub-core/disk/lvm.c

@@ -103,7 +103,7 @@ grub_lvm_detect (grub_disk_t disk,

 {

   grub_err_t err;

   grub_uint64_t mda_offset, mda_size;

-  grub_size_t ptr;

+  grub_uint64_t ptr;

   char buf[GRUB_LVM_LABEL_SIZE];

   char vg_id[GRUB_LVM_ID_STRLEN+1];

   char pv_id[GRUB_LVM_ID_STRLEN+1];

@@ -209,9 +209,9 @@ grub_lvm_detect (grub_disk_t disk,

 		   grub_le_to_cpu64 (mdah->size));

     }

-  if (grub_add ((grub_size_t)metadatabuf,

-		(grub_size_t)grub_le_to_cpu64 (rlocn->offset),

-		&ptr))

+  grub_uint64_t mdb = (grub_uint64_t)metadatabuf;

+  grub_uint64_t addend = (grub_uint64_t)grub_le_to_cpu64 (rlocn->offset);

+  if (grub_add (mdb, addend, &ptr))

     {

 error_parsing_metadata:

 #ifdef GRUB_UTIL

@@ -222,7 +222,7 @@ error_parsing_metadata:

   p = q = (char *)ptr;

-  if (grub_add ((grub_size_t)metadatabuf, (grub_size_t)mda_size, &ptr))

+  if (grub_add (mdb, mda_size, &ptr))

     goto error_parsing_metadata;

   mda_end = (char *)ptr;

@@ -391,13 +391,15 @@ error_parsing_metadata:

 		 *       + sizeof ("lvm/") - 1;

 		 */

 		grub_size_t sz0 = vgname_len, sz1 = s;

+		grub_size_t one = 1, two = 2;

+		grub_size_t lvm_str_sz = sizeof ("lvm/") - 1;

-		if (grub_mul (sz0, 2, &sz0) ||

-		    grub_add (sz0, 1, &sz0) ||

-		    grub_mul (sz1, 2, &sz1) ||

-		    grub_add (sz1, 1, &sz1) ||

+		if (grub_mul (sz0, two, &sz0) ||

+		    grub_add (sz0, one, &sz0) ||

+		    grub_mul (sz1, two, &sz1) ||

+		    grub_add (sz1, one, &sz1) ||

 		    grub_add (sz0, sz1, &sz0) ||

-		    grub_add (sz0, sizeof ("lvm/") - 1, &sz0))

+		    grub_add (sz0, lvm_str_sz, &sz0))

 		  goto lvs_fail;

 		lv->fullname = grub_malloc (sz0);

diff --git a/grub-core/font/font.c b/grub-core/font/font.c

index a7b955a1a..b36a099b8 100644

--- a/grub-core/font/font.c

+++ b/grub-core/font/font.c

@@ -361,10 +361,10 @@ static char *

 read_section_as_string (struct font_file_section *section)

 {

   char *str;

-  grub_size_t sz;

+  grub_size_t sz = section->length, one = 1;

   grub_ssize_t ret;

-  if (grub_add (section->length, 1, &sz))

+  if (grub_add (sz, one, &sz))

     return NULL;

   str = grub_malloc (sz);

diff --git a/grub-core/fs/btrfs.c b/grub-core/fs/btrfs.c

index 1d801f6c9..3faf9056c 100644

--- a/grub-core/fs/btrfs.c

+++ b/grub-core/fs/btrfs.c

@@ -323,10 +323,15 @@ save_ref (struct grub_btrfs_leaf_descriptor *desc,

     {

       void *newdata;

       grub_size_t sz;

+      grub_size_t alloced, datasz, two = 2;

-      if (grub_mul (desc->allocated, 2, &desc->allocated) ||

-	  grub_mul (desc->allocated, sizeof (desc->data[0]), &sz))

+      alloced = desc->allocated;

+      datasz = sizeof (desc->data[0]);

+

+      if (grub_mul (alloced, two, &alloced) ||

+	  grub_mul (alloced, datasz, &sz))

 	return GRUB_ERR_OUT_OF_RANGE;

+      desc->allocated = alloced;

       newdata = grub_realloc (desc->data, sz);

       if (!newdata)

@@ -624,12 +629,17 @@ find_device (struct grub_btrfs_data *data, grub_uint64_t id, int do_rescan)

     {

       void *tmp;

       grub_size_t sz;

+      grub_size_t alloced = data->n_devices_allocated;

+      grub_size_t attached_sz = sizeof(data->devices_attached[0]);

+      grub_size_t attached = data->n_devices_attached;

+      const grub_size_t one = 1, two = 2;

-      if (grub_mul (data->n_devices_attached, 2, &data->n_devices_allocated) ||

-	  grub_add (data->n_devices_allocated, 1, &data->n_devices_allocated) ||

-	  grub_mul (data->n_devices_allocated, sizeof (data->devices_attached[0]), &sz))

+      if (grub_mul (attached, two, &alloced) ||

+	  grub_add (alloced, one, &alloced) ||

+	  grub_mul (alloced, attached_sz, &sz))

 	goto fail;

+      data->n_devices_allocated = alloced;

       data->devices_attached = grub_realloc (tmp = data->devices_attached, sz);

       if (!data->devices_attached)

 	{

diff --git a/grub-core/fs/ext2.c b/grub-core/fs/ext2.c

index b4bd019f4..3d59cf131 100644

--- a/grub-core/fs/ext2.c

+++ b/grub-core/fs/ext2.c

@@ -719,7 +719,8 @@ grub_ext2_read_symlink (grub_fshelp_node_t node)

        }

     }

-  if (grub_add (grub_le_to_cpu32 (diro->inode.size), 1, &sz))

+  sz = grub_le_to_cpu32 (diro->inode.size);

+  if (grub_add (sz, (grub_size_t)1, &sz))

     {

       grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));

       return NULL;

diff --git a/grub-core/fs/hfsplus.c b/grub-core/fs/hfsplus.c

index 8b17ebba2..e06bcbb9b 100644

--- a/grub-core/fs/hfsplus.c

+++ b/grub-core/fs/hfsplus.c

@@ -478,7 +478,7 @@ grub_hfsplus_read_symlink (grub_fshelp_node_t node)

   grub_ssize_t numread;

   grub_size_t sz = node->size;

-  if (grub_add (sz, 1, &sz))

+  if (grub_add (sz, (grub_size_t)1, &sz))

     return NULL;

   symlink = grub_malloc (sz);

diff --git a/grub-core/fs/iso9660.c b/grub-core/fs/iso9660.c

index 6fc9302bc..a4403e29d 100644

--- a/grub-core/fs/iso9660.c

+++ b/grub-core/fs/iso9660.c

@@ -536,7 +536,7 @@ add_part (struct iterate_dir_ctx *ctx,

   char *new;

   if (grub_add (size, len2, &sz) ||

-      grub_add (sz, 1, &sz))

+      grub_add (sz, (grub_size_t)1, &sz))

     return;

   new = grub_realloc (ctx->symlink, sz);

@@ -580,14 +580,14 @@ susp_iterate_dir (struct grub_iso9660_susp_entry *entry,

 	    {

 	      off = grub_strlen (ctx->filename);

 	      if (grub_add (csize, off, &sz) ||

-		  grub_add (sz, 1, &sz))

+		  grub_add (sz, (grub_size_t)1, &sz))

 		return GRUB_ERR_OUT_OF_RANGE;

 	      ctx->filename = grub_realloc (ctx->filename, sz);

 	    }

 	  else

 	    {

 	      off = 0;

-	      if (grub_add (csize, 1, &sz))

+	      if (grub_add (csize, (grub_size_t)1, &sz))

 		return GRUB_ERR_OUT_OF_RANGE;

 	      ctx->filename = grub_zalloc (sz);

 	    }

@@ -807,7 +807,7 @@ grub_iso9660_iterate_dir (grub_fshelp_node_t dir,

 		struct grub_fshelp_node *new_node;

 		grub_size_t sz;

-		if (grub_mul (node->alloc_dirents, 2, &node->alloc_dirents) ||

+		if (grub_mul (node->alloc_dirents, (grub_size_t)2, &node->alloc_dirents) ||

 		    grub_sub (node->alloc_dirents, ARRAY_SIZE (node->dirents), &sz) ||

 		    grub_mul (sz, sizeof (node->dirents[0]), &sz) ||

 		    grub_add (sz, sizeof (struct grub_fshelp_node), &sz))

diff --git a/grub-core/normal/charset.c b/grub-core/normal/charset.c

index 4dfcc3107..f902b13b4 100644

--- a/grub-core/normal/charset.c

+++ b/grub-core/normal/charset.c

@@ -479,8 +479,9 @@ grub_unicode_aglomerate_comb (const grub_uint32_t *in, grub_size_t inlen,

 	    n = out->combining_inline;

 	  else if (out->ncomb > (int) ARRAY_SIZE (out->combining_inline))

 	    {

-	      if (grub_add (out->ncomb, 1, &sz) ||

-		  grub_mul (sz, sizeof (n[0]), &sz))

+	      grub_size_t ncomb = out->ncomb, one = 1, nsz = sizeof (n[0]);

+	      if (grub_add (ncomb, one, &sz) ||

+		  grub_mul (sz, nsz, &sz))

 		goto fail;

 	      n = grub_realloc (out->combining_ptr, sz);