ext3: make sure inode is deleted from orphan list after truncate

As Ted pointed out, it can happen that ext3_truncate() returns without
removing inode from orphan list.  This way we could in some rare cases
(like when we get ENOMEM from an allocation in ext3_truncate called
because of failed ext3_write_begin) leave the inode on orphan list and
that triggers assertion failure on umount.

So make ext3_truncate() always remove inode from in-memory orphan list.

Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 253c2cdc8d04699db61580d0092bd8bc0212446b..05dea8132fc0f04fa588fe163a5c6d53e0c07769 100644 (file)
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -2374,7 +2374,7 @@ void ext3_truncate(struct inode *inode)
        struct page *page;
 
        if (!ext3_can_truncate(inode))
-               return;
+               goto out_notrans;
 
        if (inode->i_size == 0 && ext3_should_writeback_data(inode))
                ei->i_state |= EXT3_STATE_FLUSH_ON_CLOSE;
@@ -2390,7 +2390,7 @@ void ext3_truncate(struct inode *inode)
                page = grab_cache_page(mapping,
                                inode->i_size >> PAGE_CACHE_SHIFT);
                if (!page)
-                       return;
+                       goto out_notrans;
        }
 
        handle = start_transaction(inode);
@@ -2401,7 +2401,7 @@ void ext3_truncate(struct inode *inode)
                        unlock_page(page);
                        page_cache_release(page);
                }
-               return;         /* AKPM: return what? */
+               goto out_notrans;
        }
 
        last_block = (inode->i_size + blocksize-1)
@@ -2525,6 +2525,14 @@ out_stop:
                ext3_orphan_del(handle, inode);
 
        ext3_journal_stop(handle);
+       return;
+out_notrans:
+       /*
+        * Delete the inode from orphan list so that it doesn't stay there
+        * forever and trigger assertion on umount.
+        */
+       if (inode->i_nlink)
+               ext3_orphan_del(NULL, inode);
 }
 
 static ext3_fsblk_t ext3_get_inode_block(struct super_block *sb,
@@ -3122,12 +3130,6 @@ int ext3_setattr(struct dentry *dentry, struct iattr *attr)
 
        rc = inode_setattr(inode, attr);
 
-       /* If inode_setattr's call to ext3_truncate failed to get a
-        * transaction handle at all, we need to clean up the in-core
-        * orphan list manually. */
-       if (inode->i_nlink)
-               ext3_orphan_del(NULL, inode);
-
        if (!rc && (ia_valid & ATTR_MODE))
                rc = ext3_acl_chmod(inode);