linux-kernel - [PATCH 0/2] objtool: Fix code reloc vs weak symbols

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Message-ID: <20220419203254.034493341@infradead.org>
Date:   Tue, 19 Apr 2022 22:32:54 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     x86@...nel.org, jpoimboe@...hat.com
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org, mbenes@...e.cz
Subject: [PATCH 0/2] objtool: Fix code reloc vs weak symbols

Two fun bugs that make can cause other fun fail if you have a fresh enough
toolchain that strips unused section symbols.

The symptoms can vary between a faulty unwind to a kernel splat for trying to
patch the wrong text.

I found it while playing with text patching and Josh confirmed it very much
affects ORC data too.