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* grub-core/fs/hfsplus.c (grub_hfsplus_btree_recoffset): Handle the

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case of aunaligned recptr.
	(grub_hfsplus_read_block): Declare extoverflow as key to ensure
	alignment.
	(grub_hfsplus_btree_search): Handle unaligned index.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2011-12-13 02:05:58 +01:00
parent 728cba91d2
commit 4c5f3056c2
2 changed files with 20 additions and 13 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2011-12-13 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/fs/hfsplus.c (grub_hfsplus_btree_recoffset): Handle the
case of aunaligned recptr.
(grub_hfsplus_read_block): Declare extoverflow as key to ensure
alignment.
(grub_hfsplus_btree_search): Handle unaligned index.
2011-12-13 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/fs/xfs.c (grub_xfs_iterate_dir): Use grub_get_unaligned16

25
grub-core/fs/hfsplus.c
View file

@ -251,10 +251,9 @@ grub_hfsplus_btree_recoffset (struct grub_hfsplus_btree *btree,
struct grub_hfsplus_btnode *node, int index)
{
char *cnode = (char *) node;
grub_uint16_t *recptr;
recptr = (grub_uint16_t *) (&cnode[btree->nodesize
- index * sizeof (grub_uint16_t) - 2]);
return grub_be_to_cpu16 (*recptr);
void *recptr;
recptr = (&cnode[btree->nodesize - index * sizeof (grub_uint16_t) - 2]);
return grub_be_to_cpu16 (grub_get_unaligned16 (recptr));
}
/* Return a pointer to the record with the index INDEX, in the node
@ -315,7 +314,7 @@ grub_hfsplus_read_block (grub_fshelp_node_t node, grub_disk_addr_t fileblock)
while (1)
{
struct grub_hfsplus_extkey *key;
struct grub_hfsplus_extkey_internal extoverflow;
struct grub_hfsplus_key_internal extoverflow;
grub_disk_addr_t blk;
grub_off_t ptr;
@ -343,11 +342,11 @@ grub_hfsplus_read_block (grub_fshelp_node_t node, grub_disk_addr_t fileblock)
}
/* Set up the key to look for in the extent overflow file. */
extoverflow.fileid = node->fileid;
extoverflow.start = fileblock - blksleft;
extoverflow.extkey.fileid = node->fileid;
extoverflow.extkey.start = fileblock - blksleft;
if (grub_hfsplus_btree_search (&node->data->extoverflow_tree,
(struct grub_hfsplus_key_internal *) &extoverflow,
&extoverflow,
grub_hfsplus_cmp_extkey, &nnode, &ptr))
{
grub_error (GRUB_ERR_READ_ERROR,
@ -697,7 +696,7 @@ grub_hfsplus_btree_search (struct grub_hfsplus_btree *btree,
}
else if (nodedesc->type == GRUB_HFSPLUS_BTNODE_TYPE_INDEX)
{
grub_uint32_t *pointer;
void *pointer;
/* The place where the key could have been found didn't
contain the key. This means that the previous match
@ -709,10 +708,10 @@ grub_hfsplus_btree_search (struct grub_hfsplus_btree *btree,
that we are looking for. The last match that is
found will be used to locate the child which can
contain the record. */
pointer = (grub_uint32_t *) ((char *) currkey
+ grub_be_to_cpu16 (currkey->keylen)
+ 2);
currnode = grub_be_to_cpu32 (*pointer);
pointer = ((char *) currkey
+ grub_be_to_cpu16 (currkey->keylen)
+ 2);
currnode = grub_be_to_cpu32 (grub_get_unaligned32 (pointer));
match = 1;
}
}