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-rw-r--r--fs/nilfs2/dat.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c
index fa0f803..0d5fada 100644
--- a/fs/nilfs2/dat.c
+++ b/fs/nilfs2/dat.c
@@ -484,6 +484,18 @@ int nilfs_dat_read(struct super_block *sb, size_t entry_size,
struct nilfs_dat_info *di;
int err;
+ if (entry_size > sb->s_blocksize) {
+ printk(KERN_ERR
+ "NILFS: too large DAT entry size: %zu bytes.\n",
+ entry_size);
+ return -EINVAL;
+ } else if (entry_size < NILFS_MIN_DAT_ENTRY_SIZE) {
+ printk(KERN_ERR
+ "NILFS: too small DAT entry size: %zu bytes.\n",
+ entry_size);
+ return -EINVAL;
+ }
+
dat = nilfs_iget_locked(sb, NULL, NILFS_DAT_INO);
if (unlikely(!dat))
return -ENOMEM;
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