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Make grub_zlib_decompress handle incomplete chunks.

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Fixes squash4.
This commit is contained in:
Vladimir Serbinenko 2013-12-18 23:39:49 +01:00
parent 2984035e1a
commit 2e238b3708
5 changed files with 38 additions and 14 deletions
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6
ChangeLog
View file

@ -1,3 +1,9 @@
2013-12-18 Vladimir Serbinenko <phcoder@gmail.com>
Make grub_zlib_decompress handle incomplete chunks.
Fixes squash4.
2013-12-18 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/Makefile.am: Don't attempt to export grub_bios_interrupt

10
grub-core/fs/btrfs.c
View file

@ -1104,8 +1104,13 @@ grub_btrfs_extent_read (struct grub_btrfs_data *data,
- (grub_uint8_t *) data->extent),
extoff, buf, csize)
!= (grub_ssize_t) csize)
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_COMPRESSED_DATA,
"premature end of compressed");
return -1;
}
}
else if (data->extent->compression == GRUB_BTRFS_COMPRESSION_LZO)
{
if (grub_btrfs_lzo_decompress(data->extent->inl, data->extsize -
@ -1158,7 +1163,12 @@ grub_btrfs_extent_read (struct grub_btrfs_data *data,
grub_free (tmp);
if (ret != (grub_ssize_t) csize)
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_COMPRESSED_DATA,
"premature end of compressed");
return -1;
}
break;
}

14
grub-core/fs/hfspluscomp.c
View file

@ -156,8 +156,12 @@ hfsplus_read_compressed_real (struct grub_hfsplus_file *node,
if (ts > node->size - (pos & ~(HFSPLUS_COMPRESS_BLOCK_SIZE)))
ts = node->size - (pos & ~(HFSPLUS_COMPRESS_BLOCK_SIZE));
if (grub_zlib_decompress (tmp_buf, sz, 0,
node->cbuf, ts) < 0)
node->cbuf, ts) != (grub_ssize_t) ts)
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_COMPRESSED_DATA,
"premature end of compressed");
grub_free (tmp_buf);
return -1;
}
@ -288,8 +292,14 @@ hfsplus_open_compressed_real (struct grub_hfsplus_file *node)
if (grub_zlib_decompress ((char *) (cmp_head + 1),
grub_cpu_to_be64 (attr_head->size)
- sizeof (*cmp_head), 0,
node->cbuf, node->size) < 0)
node->cbuf, node->size)
!= (grub_ssize_t) node->size)
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_COMPRESSED_DATA,
"premature end of compressed");
return grub_errno;
}
node->compressed = 1;
return 0;
}

8
grub-core/fs/zfs/zfs.c
View file

@ -293,9 +293,13 @@ static grub_err_t
zlib_decompress (void *s, void *d,
grub_size_t slen, grub_size_t dlen)
{
if (grub_zlib_decompress (s, slen, 0, d, dlen) < 0)
return grub_errno;
if (grub_zlib_decompress (s, slen, 0, d, dlen) == (grub_ssize_t) dlen)
return GRUB_ERR_NONE;
if (!grub_errno)
grub_error (GRUB_ERR_BAD_COMPRESSED_DATA,
"premature end of compressed");
return grub_errno;
}
static grub_err_t

6
grub-core/io/gzio.c
View file

@ -1303,12 +1303,6 @@ grub_zlib_decompress (char *inbuf, grub_size_t insize, grub_off_t off,
ret = grub_gzio_read_real (gzio, off, outbuf, outsize);
grub_free (gzio);
if (!grub_errno && ret != (grub_ssize_t) outsize)
{
grub_error (GRUB_ERR_BAD_COMPRESSED_DATA, "premature end of compressed");
ret = -1;
}
/* FIXME: Check Adler. */
return ret;
}