linux-kernel - Re: [PATCH v3 1/2] arm64/crash_core: Export KERNELPACMASK in vmcoreinfo

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Date:   Mon, 11 May 2020 17:27:54 +0100
From:   Will Deacon <will@...nel.org>
To:     Amit Daniel Kachhap <amit.kachhap@....com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     catalin.marinas@....com, Will Deacon <will@...nel.org>,
        linux-kernel@...r.kernel.org,
        Vincenzo Frascino <Vincenzo.Frascino@....com>,
        Bhupesh Sharma <bhsharma@...hat.com>,
        kexec@...ts.infradead.org, Mark Rutland <mark.rutland@....com>,
        James Morse <james.morse@....com>
Subject: Re: [PATCH v3 1/2] arm64/crash_core: Export KERNELPACMASK in vmcoreinfo

On Mon, 11 May 2020 18:31:55 +0530, Amit Daniel Kachhap wrote:
> Recently arm64 linux kernel added support for Armv8.3-A Pointer
> Authentication feature. If this feature is enabled in the kernel and the
> hardware supports address authentication then the return addresses are
> signed and stored in the stack to prevent ROP kind of attack. Kdump tool
> will now dump the kernel with signed lr values in the stack.
> 
> Any user analysis tool for this kernel dump may need the kernel pac mask
> information in vmcoreinfo to generate the correct return address for
> stacktrace purpose as well as to resolve the symbol name.
> 
> [...]

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

[1/2] arm64/crash_core: Export KERNELPACMASK in vmcoreinfo
      https://git.kernel.org/arm64/c/203b1152d18c
[2/2] Documentation/vmcoreinfo: Add documentation for 'KERNELPACMASK'
      https://git.kernel.org/arm64/c/c0fc00ec6304

Cheers,
-- 
Will

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