linux-kernel - Re: [PATCH] objtool: Fix stack overflow in validate

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Message-ID: <eu4wli5jdnbeadgjcscfmrnucpnzm2h7bmiexmisot4dw34w5f@hxrt5pwxpfdk>
Date: Wed, 3 Dec 2025 10:58:33 -0800
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org, 
	Nathan Chancellor <nathan@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
	Alexandre Chartre <alexandre.chartre@...cle.com>, David Laight <david.laight.linux@...il.com>, 
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] objtool: Fix stack overflow in validate_branch()

On Wed, Dec 03, 2025 at 10:54:19AM -0800, Josh Poimboeuf wrote:
> Keep in mind this is a worst case function for objtool: KASAN with tons
> of memory accesses.  The vast majority of functions won't come anywhere
> near that level of recursion.

And BTW, supporting that further, the max recursion depth on vmlinux.o
on a defconfig kernel is showing 162.

-- 
Josh