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Diffstat (limited to 'fs')
-rw-r--r--fs/ext2/dev.c16
-rw-r--r--fs/fat/fat.c8
2 files changed, 20 insertions, 4 deletions
diff --git a/fs/ext2/dev.c b/fs/ext2/dev.c
index 643a1a8..1728b34 100644
--- a/fs/ext2/dev.c
+++ b/fs/ext2/dev.c
@@ -96,8 +96,23 @@ int ext2fs_devread (int sector, int byte_offset, int byte_len, char *buf) {
sector++;
}
+ if (byte_len == 0)
+ return 1;
+
/* read sector aligned part */
block_len = byte_len & ~(SECTOR_SIZE - 1);
+
+ if (block_len == 0) {
+ u8 p[SECTOR_SIZE];
+
+ block_len = SECTOR_SIZE;
+ ext2fs_block_dev_desc->block_read(ext2fs_block_dev_desc->dev,
+ part_info.start + sector,
+ 1, (unsigned long *)p);
+ memcpy(buf, p, byte_len);
+ return 1;
+ }
+
if (ext2fs_block_dev_desc->block_read (ext2fs_block_dev_desc->dev,
part_info.start + sector,
block_len / SECTOR_SIZE,
@@ -106,6 +121,7 @@ int ext2fs_devread (int sector, int byte_offset, int byte_len, char *buf) {
printf (" ** ext2fs_devread() read error - block\n");
return (0);
}
+ block_len = byte_len & ~(SECTOR_SIZE - 1);
buf += block_len;
byte_len -= block_len;
sector += block_len / SECTOR_SIZE;
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index c1e5741..49c78ed 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -352,7 +352,7 @@ get_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
newclust = get_fatent(mydata, endclust);
if((newclust -1)!=endclust)
goto getit;
- if (newclust <= 0x0001 || newclust >= 0xfff0) {
+ if (CHECK_CLUST(newclust, mydata->fatsize)) {
FAT_DPRINT("curclust: 0x%x\n", newclust);
FAT_DPRINT("Invalid FAT entry\n");
return gotsize;
@@ -387,7 +387,7 @@ getit:
filesize -= actsize;
buffer += actsize;
curclust = get_fatent(mydata, endclust);
- if (curclust <= 0x0001 || curclust >= 0xfff0) {
+ if (CHECK_CLUST(curclust, mydata->fatsize)) {
FAT_DPRINT("curclust: 0x%x\n", curclust);
FAT_ERROR("Invalid FAT entry\n");
return gotsize;
@@ -459,7 +459,7 @@ get_vfatname(fsdata *mydata, int curclust, __u8 *cluster,
slotptr--;
curclust = get_fatent(mydata, curclust);
- if (curclust <= 0x0001 || curclust >= 0xfff0) {
+ if (CHECK_CLUST(curclust, mydata->fatsize)) {
FAT_DPRINT("curclust: 0x%x\n", curclust);
FAT_ERROR("Invalid FAT entry\n");
return -1;
@@ -652,7 +652,7 @@ static dir_entry *get_dentfromdir (fsdata * mydata, int startsect,
return retdent;
}
curclust = get_fatent (mydata, curclust);
- if (curclust <= 0x0001 || curclust >= 0xfff0) {
+ if (CHECK_CLUST(curclust, mydata->fatsize)) {
FAT_DPRINT ("curclust: 0x%x\n", curclust);
FAT_ERROR ("Invalid FAT entry\n");
return NULL;