aboutsummaryrefslogtreecommitdiffstats
path: root/fs/omfs
diff options
context:
space:
mode:
authorBob Copeland <me@bobcopeland.com>2010-07-06 11:16:46 -0400
committerBob Copeland <me@bobcopeland.com>2010-07-10 14:38:11 -0400
commit8800a044c71a128633cf3febaf4780531a991334 (patch)
treeb736cdc086d86f27e1b52efa96f2a3f15fe1d443 /fs/omfs
parent9442e54f433eff9b6fbd0836611df4c1919df370 (diff)
omfs: sanity check cluster size
A corrupt filesystem could have a bad cluster size; this could result in the filesystem allocating too much space for files if too large, or getting stuck in omfs_allocate_block if too small. The proper range is 1-8 blocks. Reported-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Bob Copeland <me@bobcopeland.com>
Diffstat (limited to 'fs/omfs')
-rw-r--r--fs/omfs/inode.c6
-rw-r--r--fs/omfs/omfs_fs.h1
2 files changed, 7 insertions, 0 deletions
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index 0af5d0af9f3..579d33feddd 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -517,6 +517,12 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
517 (unsigned long long) sbi->s_num_blocks); 517 (unsigned long long) sbi->s_num_blocks);
518 goto out_brelse_bh2; 518 goto out_brelse_bh2;
519 } 519 }
520 if (sbi->s_clustersize < 1 ||
521 sbi->s_clustersize > OMFS_MAX_CLUSTER_SIZE) {
522 printk(KERN_ERR "omfs: cluster size out of range (%d)",
523 sbi->s_clustersize);
524 goto out_brelse_bh2;
525 }
520 526
521 ret = omfs_get_imap(sb); 527 ret = omfs_get_imap(sb);
522 if (ret) 528 if (ret)
diff --git a/fs/omfs/omfs_fs.h b/fs/omfs/omfs_fs.h
index 12cca245d6e..ee5e4327de9 100644
--- a/fs/omfs/omfs_fs.h
+++ b/fs/omfs/omfs_fs.h
@@ -17,6 +17,7 @@
17#define OMFS_EXTENT_CONT 0x40 17#define OMFS_EXTENT_CONT 0x40
18#define OMFS_XOR_COUNT 19 18#define OMFS_XOR_COUNT 19
19#define OMFS_MAX_BLOCK_SIZE 8192 19#define OMFS_MAX_BLOCK_SIZE 8192
20#define OMFS_MAX_CLUSTER_SIZE 8
20 21
21struct omfs_super_block { 22struct omfs_super_block {
22 char s_fill1[256]; 23 char s_fill1[256];