1 files changed, 8 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 9a874b4d1501..206d03c82d96 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3359,6 +3359,14 @@ loff_t max_file_blocks(struct inode *inode)
 	leaf_count *= NIDS_PER_BLOCK;
 	result += leaf_count;
 
+	/*
+	 * For compatibility with FSCRYPT_POLICY_FLAG_IV_INO_LBLK_{64,32} with
+	 * a 4K crypto data unit, we must restrict the max filesize to what can
+	 * fit within U32_MAX + 1 data units.
+	 */
+
+	result = min(result, (((loff_t)U32_MAX + 1) * 4096) >> F2FS_BLKSIZE_BITS);
+
 	return result;
 }