From: Ingo Molnar <mingo@kernel.org>
To: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
Nathan Chancellor <nathan@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Alexandre Chartre <alexandre.chartre@oracle.com>,
David Laight <david.laight.linux@gmail.com>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH] objtool: Fix stack overflow in validate_branch()
Date: Wed, 3 Dec 2025 20:15:19 +0100 [thread overview]
Message-ID: <aTCMR-7K34UNuxDe@gmail.com> (raw)
In-Reply-To: <eu4wli5jdnbeadgjcscfmrnucpnzm2h7bmiexmisot4dw34w5f@hxrt5pwxpfdk>
* Josh Poimboeuf <jpoimboe@kernel.org> wrote:
> 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.
That's mostly immaterial - 'make allmodconfig' is not some esoteric
test, it's one of the most common testing methods by developers and CI
projects ... For example I use allmodconfig builds for every commit I
write or apply.
Thanks,
Ingo
next prev parent reply other threads:[~2025-12-03 19:15 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-02 16:16 [PATCH] objtool: Fix stack overflow in validate_branch() Josh Poimboeuf
2025-12-02 16:20 ` Ingo Molnar
2025-12-02 16:49 ` Josh Poimboeuf
2025-12-02 17:03 ` Ingo Molnar
2025-12-02 17:11 ` Josh Poimboeuf
2025-12-02 19:56 ` Josh Poimboeuf
2025-12-02 20:20 ` Ingo Molnar
2025-12-02 22:05 ` David Laight
2025-12-02 23:01 ` Josh Poimboeuf
2025-12-03 11:02 ` David Laight
2025-12-03 16:11 ` Ingo Molnar
2025-12-03 16:40 ` [tip: objtool/urgent] objtool: Add more robust signal error handling, detect and warn about stack overflows tip-bot2 for Josh Poimboeuf
2025-12-03 18:48 ` tip-bot2 for Josh Poimboeuf
2025-12-03 9:25 ` [PATCH] objtool: Fix stack overflow in validate_branch() Ingo Molnar
2025-12-03 18:54 ` Josh Poimboeuf
2025-12-03 18:58 ` Josh Poimboeuf
2025-12-03 19:15 ` Ingo Molnar [this message]
2025-12-03 19:37 ` David Laight
2025-12-03 20:30 ` Linus Torvalds
2025-12-03 23:53 ` Josh Poimboeuf
2025-12-03 19:11 ` Ingo Molnar
2025-12-04 2:47 ` Josh Poimboeuf
2025-12-02 16:27 ` [tip: objtool/urgent] " tip-bot2 for Josh Poimboeuf
2025-12-02 16:28 ` [PATCH] " Josh Poimboeuf
2025-12-02 16:41 ` Ingo Molnar
2025-12-02 16:44 ` [tip: objtool/urgent] " tip-bot2 for Josh Poimboeuf
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