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-rw-r--r--fs/squashfs/block.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/squashfs/block.c b/fs/squashfs/block.c
index c837dfc2b3c..321728f48f2 100644
--- a/fs/squashfs/block.c
+++ b/fs/squashfs/block.c
@@ -80,7 +80,7 @@ static struct buffer_head *get_block_length(struct super_block *sb,
* generated a larger block - this does occasionally happen with zlib).
*/
int squashfs_read_data(struct super_block *sb, void **buffer, u64 index,
- int length, u64 *next_index, int srclength)
+ int length, u64 *next_index, int srclength, int pages)
{
struct squashfs_sb_info *msblk = sb->s_fs_info;
struct buffer_head **bh;
@@ -185,6 +185,14 @@ int squashfs_read_data(struct super_block *sb, void **buffer, u64 index,
}
if (msblk->stream.avail_out == 0) {
+ if (page == pages) {
+ ERROR("zlib_inflate tried to "
+ "decompress too much data, "
+ "expected %d bytes. Zlib "
+ "data probably corrupt\n",
+ srclength);
+ goto release_mutex;
+ }
msblk->stream.next_out = buffer[page++];
msblk->stream.avail_out = PAGE_CACHE_SIZE;
}
@@ -268,7 +276,8 @@ block_release:
put_bh(bh[k]);
read_failure:
- ERROR("sb_bread failed reading block 0x%llx\n", cur_index);
+ ERROR("squashfs_read_data failed to read block 0x%llx\n",
+ (unsigned long long) index);
kfree(bh);
return -EIO;
}