Commit 0f2ddca6 authored by From: Thiemo Nagel's avatar From: Thiemo Nagel Committed by Theodore Ts'o

ext4: check block device size on mount

Signed-off-by: default avatarThiemo Nagel <thiemo.nagel@ph.tum.de>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent e44543b8
......@@ -2508,6 +2508,15 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
if (EXT4_BLOCKS_PER_GROUP(sb) == 0)
goto cantfind_ext4;
/* check blocks count against device size */
blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
if (blocks_count && ext4_blocks_count(es) > blocks_count) {
printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu "
"exceeds size of device (%llu blocks)\n",
ext4_blocks_count(es), blocks_count);
goto failed_mount;
}
/*
* It makes no sense for the first data block to be beyond the end
* of the filesystem.
......
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