Re: [PATCH -next] ext4: Fix warning in ext4_da_release_space

[Theodore Ts'o]

On Fri, May 27, 2022 at 05:10:43PM +0800, yebin wrote:
> 
> Maybe  you can  run syzkaller with log as follows :

Oh, so this was something that was found using Syzkaller.  Was this
using the public syzkaller; if so, can you provide a link the
Syzkaller report?

If this was a from privately run syzkaller instance, was there a C
reproducer?  It appears that this was from a fuzzed instance, and it's
painful enoguh to extract the file system image from the C reproducer.
I have no idea how to extract the file system image from a Syzkaller
reproducer.

In any case, it sounds like this was triggered from a maliciously
corrupted / fuzzed image.  Can this warning be triggered from a
consistent file system, or does it require a corrupted extent tree?

	   		   	   	   - Ted