linux-kernel - Re: [syzbot] Re: BUG: MAX_LOCKDEP

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Message-ID: <00000000000092a1f90612f37f35@google.com>
Date: Tue, 05 Mar 2024 17:01:26 -0800
From: syzbot <syzbot+8a249628ae32ea7de3a2@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Re: BUG: MAX_LOCKDEP_CHAINS too low! (3)

For archival purposes, forwarding an incoming command email to
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***

Subject: Re: BUG: MAX_LOCKDEP_CHAINS too low! (3)
Author: david@...morbit.com

On Wed, Mar 06, 2024 at 11:58:18AM +1100, Dave Chinner wrote:
> 
> Lockdep is hitting the maximum dependency chain tracker size:
> 
> VM DIAGNOSIS:
>  lock-classes:                         4657 [max: 8192]
>  direct dependencies:                 23720 [max: 131072]
>  indirect dependencies:              274342
>  all direct dependencies:           1053416
>  dependency chains:                   65377 [max: 65536]
> 
> Some of the reproducers don't involve XFS at all, but all seem to
> show something like:
> 
>  dependency chains:                  131072 [max: 131072]
> 
> So this is a core kernel or syzkaller kernel config issue and not
> an XFS issue.
> 
> # syz subsystems: kernel

Ugh. try this again:

#syz set subsystems: kernel

-- 
Dave Chinner
david@...morbit.com