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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
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@ -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> 2011-12-13 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/fs/xfs.c (grub_xfs_iterate_dir): Use grub_get_unaligned16 * 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) struct grub_hfsplus_btnode *node, int index)
{ {
char *cnode = (char *) node; char *cnode = (char *) node;
grub_uint16_t *recptr; void *recptr;
recptr = (grub_uint16_t *) (&cnode[btree->nodesize recptr = (&cnode[btree->nodesize - index * sizeof (grub_uint16_t) - 2]);
- index * sizeof (grub_uint16_t) - 2]); return grub_be_to_cpu16 (grub_get_unaligned16 (recptr));
return grub_be_to_cpu16 (*recptr);
} }
/* Return a pointer to the record with the index INDEX, in the node /* 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) while (1)
{ {
struct grub_hfsplus_extkey *key; struct grub_hfsplus_extkey *key;
struct grub_hfsplus_extkey_internal extoverflow; struct grub_hfsplus_key_internal extoverflow;
grub_disk_addr_t blk; grub_disk_addr_t blk;
grub_off_t ptr; 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. */ /* Set up the key to look for in the extent overflow file. */
extoverflow.fileid = node->fileid; extoverflow.extkey.fileid = node->fileid;
extoverflow.start = fileblock - blksleft; extoverflow.extkey.start = fileblock - blksleft;
if (grub_hfsplus_btree_search (&node->data->extoverflow_tree, if (grub_hfsplus_btree_search (&node->data->extoverflow_tree,
(struct grub_hfsplus_key_internal *) &extoverflow, &extoverflow,
grub_hfsplus_cmp_extkey, &nnode, &ptr)) grub_hfsplus_cmp_extkey, &nnode, &ptr))
{ {
grub_error (GRUB_ERR_READ_ERROR, 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) 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 /* The place where the key could have been found didn't
contain the key. This means that the previous match 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 that we are looking for. The last match that is
found will be used to locate the child which can found will be used to locate the child which can
contain the record. */ contain the record. */
pointer = (grub_uint32_t *) ((char *) currkey pointer = ((char *) currkey
+ grub_be_to_cpu16 (currkey->keylen) + grub_be_to_cpu16 (currkey->keylen)
+ 2); + 2);
currnode = grub_be_to_cpu32 (*pointer); currnode = grub_be_to_cpu32 (grub_get_unaligned32 (pointer));
match = 1; match = 1;
} }
} }