linux-kernel - Re: [PATCH v2] arm64/sve: Lower the maximum allocation for the SVE ptrace regset

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Date: Thu, 15 Feb 2024 12:44:37 +0000
From: Will Deacon <will@...nel.org>
To: Mark Brown <broonie@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>
Cc: kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	linux-kernel@...r.kernel.org,
	Dave Martin <Dave.Martin@....com>,
	Doug Anderson <dianders@...omium.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] arm64/sve: Lower the maximum allocation for the SVE ptrace regset

On Tue, 13 Feb 2024 18:24:38 +0000, Mark Brown wrote:
> Doug Anderson observed that ChromeOS crashes are being reported which
> include failing allocations of order 7 during core dumps due to ptrace
> allocating storage for regsets:
> 
>   chrome: page allocation failure: order:7,
>           mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO),
>           nodemask=(null),cpuset=urgent,mems_allowed=0
>    ...
>   regset_get_alloc+0x1c/0x28
>   elf_core_dump+0x3d8/0xd8c
>   do_coredump+0xeb8/0x1378
> 
> [...]

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

[1/1] arm64/sve: Lower the maximum allocation for the SVE ptrace regset
      https://git.kernel.org/arm64/c/2813926261e4

Cheers,
-- 
Will

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