linux-kernel - Re: [PATCH] mm/kmemleak: Fix sleeping function called from invalid context in kmemleak_seq

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Message-ID: <20241120164043.T1JuBALe@linutronix.de>
Date: Wed, 20 Nov 2024 17:40:43 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Catalin Marinas <catalin.marinas@....com>,
	Alessandro Carminati <acarmina@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Clark Williams <clrkwllms@...nel.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-rt-devel@...ts.linux.dev,
	Thomas Weissschuh <thomas.weissschuh@...utronix.de>,
	Alessandro Carminati <alessandro.carminati@...il.com>,
	Juri Lelli <juri.lelli@...hat.com>,
	Gabriele Paoloni <gpaoloni@...hat.com>,
	Eric Chanudet <echanude@...hat.com>
Subject: Re: [PATCH] mm/kmemleak: Fix sleeping function called from invalid
 context in kmemleak_seq_show

On 2024-11-20 10:26:02 [-0500], Steven Rostedt wrote:
> The "%pK" dereferences a pointer and there's some SELinux hooks attached to
> that code. The problem is that the SELinux hooks take spinlocks. This would
> not have been an issue if it wasn't for that "%pK" in the format.

That is missing check and I think Thomas Weissschuh wanted to add it. So
we don't call into selinux.

Sebastian