linux-kernel - Re: Stack corruption in bch2_nocow

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Message-ID: <2g6gw7ybne5d5u2ewsbfpsoxslw5vie3d6whlhrcmbombkyzqs@dd6tr3se6fu7>
Date: Sat, 30 Dec 2023 17:40:57 -0500
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: Daniel J Blueman <daniel@...ra.org>
Cc: linux-bcachefs@...r.kernel.org, 
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Stack corruption in bch2_nocow_write

On Fri, Dec 29, 2023 at 07:43:13PM +0800, Daniel J Blueman wrote:
> Hi Kent et al,
> 
> On Linux 6.7-rc7 from bcachefs master SHA f3608cbdfd built with UBSAN
> [1], with a crafted workload [2] I'm able to trigger stack corruption
> in bch2_nocow_write [3].
> 
> Let me know if you can't reproduce it and I'll check reproducibility
> on another platform, and let me know for any patch testing.

Can you give the bcachefs-testing branch a try?