linux-kernel - Re: [PATCH] KVM: selftests: Fix core dump in rseq

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Message-ID: <176469500942.1209959.4892875353793397176.b4-ty@google.com>
Date: Tue,  2 Dec 2025 09:05:12 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, kvmarm@...ts.linux.dev, 
	Gavin Shan <gshan@...hat.com>
Cc: kvm@...r.kernel.org, linux-kselftest@...r.kernel.org, 
	linux-kernel@...r.kernel.org, pbonzini@...hat.com, shuah@...nel.org, 
	shan.gavin@...il.com
Subject: Re: [PATCH] KVM: selftests: Fix core dump in rseq_test

On Mon, 24 Nov 2025 15:04:27 +1000, Gavin Shan wrote:
> In commit 0297cdc12a87 ("KVM: selftests: Add option to rseq test to
> override /dev/cpu_dma_latency"), a 'break' is missed before the option
> 'l' in the argument parsing loop, which leads to an unexpected core
> dump in atoi_paranoid(). It tries to get the latency from non-existent
> argument.
> 
>   host$ ./rseq_test -u
>   Random seed: 0x6b8b4567
>   Segmentation fault (core dumped)
> 
> [...]

Applied to kvm-x86 fixes, with a massaged shortlog.  FWIW, I'm planning on
sending Paolo a fixes pull request later this week, so this should make it
into 6.19-rc1.

[1/1] KVM: selftests: Add missing "break" in rseq_test's param parsing
      https://github.com/kvm-x86/linux/commit/1b9439c933b5

--
https://github.com/kvm-x86/linux/tree/next