Based on the provided code slice and the identified vulnerability in line 12 related to CWE-787 (Out-of-bounds Write), here are five possible patches to address the issue:

Patch 1:
```diff
12 - 	filemap_fdatawrite(&inode->i_data);
12 + 	if (inode && inode->i_data.nrpages > 0)
13 + 		filemap_fdatawrite(&inode->i_data);
```

Patch 2:
```diff
11 	clear_inode(inode);
12 - 	filemap_fdatawrite(&inode->i_data);
12 + 	if (inode)
13 + 		filemap_write_and_wait(&inode->i_data);
```

Patch 3:
```diff
12 - 	filemap_fdatawrite(&inode->i_data);
12 + 	if (inode && S_ISREG(inode->i_mode))
13 + 		filemap_fdatawrite(&inode->i_data);
```

Patch 4:
```diff
11 	clear_inode(inode);
12 - 	filemap_fdatawrite(&inode->i_data);
12 + 	if (inode && !IS_ERR(inode))
13 + 		filemap_fdatawrite(&inode->i_data);
```

Patch 5:
```diff
12 - 	filemap_fdatawrite(&inode->i_data);
12 + 	if (inode && inode->i_mapping)
13 + 		filemap_fdatawrite(inode->i_mapping);
```

These patches aim to add checks to ensure that the inode and its data are valid before calling filemap_fdatawrite(), potentially preventing out-of-bounds write operations.