Re: [RFC PATCH] ext4: increase the protection of drop nlink and ext4 inode destroy

From: Valdis . Kletnieks
Date: Sat Dec 31 2016 - 17:59:57 EST

On Mon, 26 Dec 2016 20:34:17 +0800, yi zhang said:
> Because of the disk and hardware issue, the ext4 filesystem have
> many errors, the inode->i_nlink of ext4 becomes zero abnormally
> but the dentry is still positive, it will cause memory corruption
> after the following process:
> 1) Due to the inode->i_nlink is 0, this inode will be added into
> the orhpan list,

> + if (WARN(inode->i_nlink == 0, "inode %lu nlink"
> + " is already 0", inode->i_ino))

Can we get the filesystem? Or at least the device major/minor? If a system
has multiple large ext4 filesystems, it would be helpful to know which
one is having the problem.

Attachment: pgpuYhT5erzow.pgp
Description: PGP signature