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 8A584262A6; Tue, 31 Mar 2026 16:44:27 +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=1774975467; cv=none; b=MY7ARML7aoJFuPWgneCoUqW9A5MSx7ahVZ/I2RYbPB74SrpN0Uq45eYZKBD4aMY5hanMUbrAbibJrYzJhdaDnENRy+rrW0moe4Ofw5FG4p8fvEpXan9r6NVGNJa56CBFupVtXFS8F4lClsPaWDflGzxnfIBGynW8EUNwBjkKlrY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774975467; c=relaxed/simple; bh=o/BLT4YVzWQvszgDET7VWzb53qYtxHSbOfwNOs+zEqs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XqM6LSlDMCA0a3pVTa7QsFX+E8IkzNudKu/WmKKwzVzAHQKPb1BNoZrhQFppz7ZsVCT9Nu+ScxUx45bxQKkhL/XPAr5skr71BM+2yBq/MS8EHUjqwnamaeWxRxW6py9d0iz4J1ngsYtDzAbah0aY0UnEzwTFCHsTSP8TzmkOBhc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=LTTuyaDZ; 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="LTTuyaDZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2133CC19423; Tue, 31 Mar 2026 16:44:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774975467; bh=o/BLT4YVzWQvszgDET7VWzb53qYtxHSbOfwNOs+zEqs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LTTuyaDZwpvWLVbia/fkSOEIt6qhrJplOWCPtMPVyGeuENzL4sSBHDMggK6UZ3Som DHqnYaMbkOMYRK8rfc28RBHZmsbA36amKcIRPbegX5oz7Mof5odj6uXBLBxq9BGBEL Su2g5LJbwSXxGFwS6Nn8EBaLd0W854ZEaRMq+gAw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Aurelien Jarno , Huacai Chen Subject: [PATCH 6.19 273/342] LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust Date: Tue, 31 Mar 2026 18:21:46 +0200 Message-ID: <20260331161808.989234631@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260331161758.909578033@linuxfoundation.org> References: <20260331161758.909578033@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 6.19-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 @@ -562,6 +562,9 @@ 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;