From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793829365; b=Y588HsAZVgSnpLhxuZChukvZzJqomdQVcpD0ktccrTa3vNUaKiaisiDDUR1+lCg4uP29 6+r9fvMRLReP6pwJaObIv684MbnIHIq6ofF8BUgqEOo0cxVSx8JzgDXXRybPj50EDea4o cw4NrRqi1wD//cjCM9b480QCBQ2X1xmbvGpEELJrpYjW+sXC944Arjh3QJrWOLPZ23Jof sTdnAspa82zcNhf8Hbrq7TpAs+jsSPgnvq4smYJQvDq0CgR2jPc0Do/RcAlvmllNuFZn2 nWhc9/JicMZciVDwWciMZUa96S+lNIYeShoNnB/4rnBY9V2ijDS+mU1xB24rx3wyCgQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793829365; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=etRBwbWZwf2dqkTt7MSe/Bt3rSkDIC9fTTLGUW8pa1Q=; b=bfH/Bnfx3j51T78rsODbYX7LP0be+WncK+OjOXX9aucrxVpGPmu2/r1cr9bJf74+o+mP 25Gvw73YYFidszRjsiPsNtXpoFpA2RkZidMWayLKCCT34SkOyaMFTivmhWpFa+Slx/r5Y XlxAnmk4DNmULVsPJbsjW0W1M0qFgHdaDk2QznshCDxuWqIDN4kIHmJhxOXrb/RaTFhsI WdCHwCXgEMQzjL1T0LdonkUzPJE5eZk6K3mT+3yWnC8R36ZHTwzNbAMns/oVPBf7IumdD mD6dKo70u70oJa3qT84ecWDIB25hFnIcn3ueSP6G2wi/s0YSt8a45S08eyFkzOkyHjw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=j4UgPmj1; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4790360BF2DE; Wed, 4 Nov 2026 21:56:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=j4UgPmj1 Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF8161F00919; Wed, 4 Nov 2026 21:56:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793829365; bh=etRBwbWZwf2dqkTt7MSe/Bt3rSkDIC9fTTLGUW8pa1Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=j4UgPmj1U1aGy7kb5eOh0KCm8rMYbzazJsOnOJrAlKhp3CA+Dd6yYNvFUKXl/ZO03 dB+AgdMrefKgbHWwAxvivLEAgCoWZ076/h6xlXeTv25NvzkF4p/EIbGsxxIIUZoIHT i+w8TR6khQ4Ib3tmtndsYCfQwhr/LY5N5rqBUKCU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Eric Huang , Philip Yang , Alex Deucher , Sasha Levin Subject: [PATCH 6.18 0079/1005] drm/amdkfd: add sanity check in svm_range_is_valid Date: Wed, 4 Nov 2026 15:56:52 -0500 Message-ID: <20261104211045.830486538@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261104211043.516122098@linuxfoundation.org> References: <20261104211043.516122098@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric Huang [ Upstream commit aa7e29cf9a37092cf5057a612ee09f28df20258f ] to prevent svm range to be overflow or underflow. Signed-off-by: Eric Huang Reviewed-by: Philip Yang Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 202ed1c456320..1b29dee7948d8 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -3421,7 +3421,13 @@ svm_range_is_valid(struct kfd_process *p, uint64_t start, uint64_t size) unsigned long start_unchg = start; start <<= PAGE_SHIFT; - end = start + (size << PAGE_SHIFT); + + if (size == 0) + return -EINVAL; + + if (check_add_overflow(start, size << PAGE_SHIFT, &end)) + return -EOVERFLOW; + do { vma = vma_lookup(p->mm, start); if (!vma || (vma->vm_flags & device_vma)) -- 2.53.0