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2010-01-27 Robert Millan <rmh.grub@aybabtu.com>

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* kern/disk.c (grub_disk_read): Fix bug that would cause infinite
	loop when using read hooks on files whose size isn't sector-aligned.
This commit is contained in:
Robert Millan 2010-01-27 03:15:03 +00:00
parent c294d9d812
commit 67667b9ced
2 changed files with 11 additions and 4 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2010-01-27 Robert Millan <rmh.grub@aybabtu.com>
* kern/disk.c (grub_disk_read): Fix bug that would cause infinite
loop when using read hooks on files whose size isn't sector-aligned.
2010-01-27 Robert Millan <rmh.grub@aybabtu.com> 2010-01-27 Robert Millan <rmh.grub@aybabtu.com>
Remove unused parameter. Remove unused parameter.

10
kern/disk.c
View file

@ -464,12 +464,14 @@ grub_disk_read (grub_disk_t disk, grub_disk_addr_t sector,
if (disk->read_hook) if (disk->read_hook)
while (size) while (size)
{ {
grub_size_t to_read = (size > GRUB_DISK_SECTOR_SIZE) ? GRUB_DISK_SECTOR_SIZE : size;
(disk->read_hook) (sector, real_offset, (disk->read_hook) (sector, real_offset,
((size > GRUB_DISK_SECTOR_SIZE) to_read);
? GRUB_DISK_SECTOR_SIZE if (grub_errno != GRUB_ERR_NONE)
: size)); goto finish;
sector++; sector++;
size -= GRUB_DISK_SECTOR_SIZE - real_offset; size -= to_read - real_offset;
real_offset = 0; real_offset = 0;
} }