From 89c0fd014d34d409a7b196667c2b9a4813b6c968 Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Sun, 25 Jul 2010 22:44:53 +0900 Subject: nilfs2: reject filesystem with unsupported block size This inserts sanity check that refuses to mount a filesystem with unsupported block size. Previously, kernel code of nilfs was looking only limitation of devices though mkfs.nilfs2 limits the range of block sizes; there was no check that prevents rec_len overflow with larger block sizes. With this change, block sizes larger than 64KB or smaller than 1KB will get rejected explicitly by kernel. Signed-off-by: Ryusuke Konishi --- fs/nilfs2/the_nilfs.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'fs/nilfs2/the_nilfs.c') diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c index da67b560f3c3..37de1f062d81 100644 --- a/fs/nilfs2/the_nilfs.c +++ b/fs/nilfs2/the_nilfs.c @@ -671,7 +671,7 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data) goto out; } - blocksize = sb_min_blocksize(sb, BLOCK_SIZE); + blocksize = sb_min_blocksize(sb, NILFS_MIN_BLOCK_SIZE); if (!blocksize) { printk(KERN_ERR "NILFS: unable to set blocksize\n"); err = -EINVAL; @@ -690,6 +690,13 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data) goto failed_sbh; blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size); + if (blocksize < NILFS_MIN_BLOCK_SIZE || + blocksize > NILFS_MAX_BLOCK_SIZE) { + printk(KERN_ERR "NILFS: couldn't mount because of unsupported " + "filesystem blocksize %d\n", blocksize); + err = -EINVAL; + goto failed_sbh; + } if (sb->s_blocksize != blocksize) { int hw_blocksize = bdev_logical_block_size(sb->s_bdev); -- cgit v1.2.1