X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=fs%2Fnilfs2%2Fcpfile.c;h=0d58075f34e29da6f666b008afdcaa74596b0255;hb=ce7613db2d8d4d5af2587ab5d7090055c4562201;hp=deaa3d33a0aafa7a6cc303a263288784d03e002f;hpb=fac805f8c198092de9a2842efd7f5022e2937b18;p=karo-tx-linux.git

diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c
index deaa3d33a0aa..0d58075f34e2 100644
--- a/fs/nilfs2/cpfile.c
+++ b/fs/nilfs2/cpfile.c
@@ -942,6 +942,18 @@ int nilfs_cpfile_read(struct super_block *sb, size_t cpsize,
 	struct inode *cpfile;
 	int err;
 
+	if (cpsize > sb->s_blocksize) {
+		printk(KERN_ERR
+		       "NILFS: too large checkpoint size: %zu bytes.\n",
+		       cpsize);
+		return -EINVAL;
+	} else if (cpsize < NILFS_MIN_CHECKPOINT_SIZE) {
+		printk(KERN_ERR
+		       "NILFS: too small checkpoint size: %zu bytes.\n",
+		       cpsize);
+		return -EINVAL;
+	}
+
 	cpfile = nilfs_iget_locked(sb, NULL, NILFS_CPFILE_INO);
 	if (unlikely(!cpfile))
 		return -ENOMEM;