btrfs: Prevent creation of files larger than RLIMIT_FSIZE using fallocate

Commit Message

Nikanth Karthikesan May 4, 2010, 5:44 a.m. UTC

None

Patch

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 2bfdc64..a1d8fbc 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5829,6 +5829,11 @@  static long btrfs_fallocate(struct inode *inode, int mode,
 	btrfs_wait_ordered_range(inode, alloc_start, alloc_end - alloc_start);
 
 	mutex_lock(&inode->i_mutex);
+
+	ret = inode_newsize_ok(inode, (offset + len));
+	if (ret)
+		goto out;
+
 	if (alloc_start > inode->i_size) {
 		ret = btrfs_cont_expand(inode, alloc_start);
 		if (ret)