linux-kernel - Re: [PATCH v2] arm64: asm-bug: Add .align 2 to the end of __BUG

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Date: Tue, 21 May 2024 19:39:24 +0100
From: Will Deacon <will@...nel.org>
To: mark.rutland@....com,
	catalin.marinas@....com,
	Dave.Martin@....com,
	xieyuanbin1@...wei.com,
	Jiangfeng Xiao <xiaojiangfeng@...wei.com>
Cc: kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	nixiaoming@...wei.com,
	wangbing6@...wei.com,
	douzhaolei@...wei.com,
	liaohua4@...wei.com,
	lijiahuan5@...wei.com,
	wangfangpeng1@...wei.com
Subject: Re: [PATCH v2] arm64: asm-bug: Add .align 2 to the end of __BUG_ENTRY

On Mon, 20 May 2024 21:34:37 +0800, Jiangfeng Xiao wrote:
> When CONFIG_DEBUG_BUGVERBOSE=n, we fail to add necessary padding bytes
> to bug_table entries, and as a result the last entry in a bug table will
> be ignored, potentially leading to an unexpected panic(). All prior
> entries in the table will be handled correctly.
> 
> The arm64 ABI requires that struct fields of up to 8 bytes are
> naturally-aligned, with padding added within a struct such that struct
> are suitably aligned within arrays.
> 
> [...]

Applied to arm64 (for-next/core), thanks!

[1/1] arm64: asm-bug: Add .align 2 to the end of __BUG_ENTRY
      https://git.kernel.org/arm64/c/ffbf4fb9b5c1

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev