From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B2CC9311967; Tue, 31 Mar 2026 17:08:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774976908; cv=none; b=GOjVIvA3J68jS5uiDNZG+ATMvRZ3JTKIY+W1apQKKpXw88ypGB199PKXK5KzU52PYZ6hjtzN8OWWu3FWhWHoGxMdPfI6JX1gWtbR6wQE2gPlNkS0YNY5iO8LZMsiso6IcBPp66nfmoOsHqMTRCYusMN6tXx9F3iiJsPSRJPzFMI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774976908; c=relaxed/simple; bh=Ckq3ozTv97i/GKHCRV3itnr60/IZGS7VktKIAIHlYTY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FOo9V8XxEILkaHfzTRF715JGJIbMZuqnV3Ty7tUBvQS3mBa6OPCHvpOuKsSYnzmEyR9eHhPb3xqAT/yxHLQ59YlKVKd5U1jeFRK1NkquL2zHF8Oh3waynaBdTvDuxA4NCX0cSlvw3UdiXRot2lCnsFCev7behYEdjgUX2kwfSWQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=TeqjyY/C; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="TeqjyY/C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EAD45C19423; Tue, 31 Mar 2026 17:08:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774976908; bh=Ckq3ozTv97i/GKHCRV3itnr60/IZGS7VktKIAIHlYTY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TeqjyY/CnVUEboayLEisr/San3fFHTBshOMG9QqVl9Rjed5bsWNKV93g51G/t07a3 rGQfpSCfj6szF3xyA/oz5mbqDl38jA7THRp1Yp/nrAbUQszwHfo12CWBsMQadxp63I 6u28XJtgu16g3Jcmh5v0qiV3y+FaWc0xHsKx3uig= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Aurelien Jarno , Huacai Chen Subject: [PATCH 6.18 241/309] LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust Date: Tue, 31 Mar 2026 18:22:24 +0200 Message-ID: <20260331161802.445210324@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260331161753.468533260@linuxfoundation.org> References: <20260331161753.468533260@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Huacai Chen commit 2db06c15d8c7a0ccb6108524e16cd9163753f354 upstream. kvm_get_vcpu_by_cpuid() takes a cpuid parameter whose type is int, so cpuid can be negative. Let kvm_get_vcpu_by_cpuid() return NULL for this case so as to make it more robust. This fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[]. Cc: Fixes: 73516e9da512adc ("LoongArch: KVM: Add vcpu mapping from physical cpuid") Reported-by: Aurelien Jarno Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1131431 Signed-off-by: Huacai Chen Signed-off-by: Greg Kroah-Hartman --- arch/loongarch/kvm/vcpu.c | 3 +++ 1 file changed, 3 insertions(+) --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -561,6 +561,9 @@ struct kvm_vcpu *kvm_get_vcpu_by_cpuid(s { struct kvm_phyid_map *map; + if (cpuid < 0) + return NULL; + if (cpuid >= KVM_MAX_PHYID) return NULL;