linux-ext4 - Issue in ext4 rename

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Date:	Thu, 2 Apr 2015 18:49:07 +0800
From:	Joseph Qi <joseph.qi@...wei.com>
To:	<linux-ext4@...r.kernel.org>
Subject: Issue in ext4 rename

Hi all,
In ext4_rename_delete, it only logs a warning if ext4_delete_entry
fails.
IMO, it may lead to an inode with two entries (old and new), thus
filesystem will be inconsistent.
The case is described below:
ext4_rename
	--> ext4_journal_start
	--> ext4_add_entry (new)
	--> ext4_rename_delete (old)
		--> ext4_delete_entry
			--> ext4_journal_get_write_access
			*failed* because of -ENOMEM
	--> ext4_journal_stop
Does anyone have an idea to resolve this issue?

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