linux-kernel - Re: [PATCH 1/1] radix-tree: Prevent NULL pointer dereference in radix_tree_node_rcu

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Message-ID: <20250225184502.1222081-1-ayaanmirzabaig85@gmail.com>
Date: Wed, 26 Feb 2025 00:14:56 +0530
From: Ayaan Mirza Baig <ayaanmirzabaig85@...il.com>
To: akpm@...ux-foundation.org
Cc: ayaanmirzabaig85@...il.com,
	linux-kernel@...r.kernel.org,
	paulmck@...nel.org,
	syzbot+80e5d6f453f14a53383a@...kaller.appspotmail.com
Subject: Re: [PATCH 1/1] radix-tree: Prevent NULL pointer dereference in radix_tree_node_rcu_free

Hi Andrew,

Thank you for reviewing the patch! I’d be happy to assist in debugging the issue, though I’ll need some guidance since I’m still learning kernel development workflows. Could you or Paul clarify:

What specific symptom or failure prompted the need for investigation ?

Are there subsystems or tools I should focus on ?

How can I reproduce the issue locally to gather more data?

I’ll start by re-testing my patch with CONFIG_DEBUG_ATOMIC_SLEEP and lockdep enabled, and share any findings. Please let me know how I can contribute further!