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 DF6F83FF1D5; Fri, 15 May 2026 15:53:32 +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=1778860412; cv=none; b=ivxJdhWPfpFQoTIR4lW6hMV02QjTG1RhqenXbMtFpfmwIbLoTWk2kyqQyffOgsSVl6gUX8iB6sdG6rRKHvQ6SmnewXmY/hWD7FFveqPHU/e7Aft4xOVz8i9UuQ4SX17c9J40e4J/smURqSYxBwtKjhVTtJJ9wBiVbYGb/ggo0Gc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778860412; c=relaxed/simple; bh=cuqLLFv4b3RDariK7k0Xa+PJPCBmoIrrf93igejvyKg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SxP1/CsDhJKW6fP4jb3LXcqibJqDkxuFdIytRJxkCRvMwfvJyR4IUEkMxpBNPyky5XMNnDv5eBqAumvfc09f89fln1Ek80iowN92FW8swgcQ3xbNTxNWVqvkbFol08ZRrE0tj/Ec6gR2JzwMwZ6eP7by/tXQi7Bvmz2SuhWe9vY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pGVrcIUX; 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="pGVrcIUX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73F64C2BCB3; Fri, 15 May 2026 15:53:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778860412; bh=cuqLLFv4b3RDariK7k0Xa+PJPCBmoIrrf93igejvyKg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pGVrcIUXCIIsgerNN6zbgZ76NqH7kKqIEw+aL5HY5QQssUX9t8OVjCKRoC88bDCMp UsMs4a+VOWFbnqQpRI/F5az9cCjBnafZOmiNFjsa6U/IwHPqY+qVyrs/B+1Yuh2Adj WEtUp5y/IZeGX2+P/zcOVJQc//M7xuZq8CVRsFGY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Amir Shetaia , Alysa Liu , Alex Deucher Subject: [PATCH 6.12 079/144] drm/amdkfd: validate SVM ioctl nattr against buffer size Date: Fri, 15 May 2026 17:48:25 +0200 Message-ID: <20260515154655.361439275@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260515154653.469907118@linuxfoundation.org> References: <20260515154653.469907118@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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alysa Liu commit 045e0ff208f0838a246c10204105126611b267a1 upstream. Validate nattr field against the buffer size, preventing out-of-bounds buffer access via user-controlled attribute count. Reviewed-by: Amir Shetaia Signed-off-by: Alysa Liu Signed-off-by: Alex Deucher (cherry picked from commit 5eca8bfdfa456c3304ca77523718fe24254c172f) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 26 ++++++++++++++++++++++++-- drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 3 +++ 2 files changed, 27 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -1681,6 +1682,16 @@ static int kfd_ioctl_smi_events(struct f return kfd_smi_event_open(pdd->dev, &args->anon_fd); } +static int kfd_ioctl_svm_validate(void *kdata, unsigned int usize) +{ + struct kfd_ioctl_svm_args *args = kdata; + size_t expected = struct_size(args, attrs, args->nattr); + + if (expected == SIZE_MAX || usize < expected) + return -EINVAL; + return 0; +} + #if IS_ENABLED(CONFIG_HSA_AMD_SVM) static int kfd_ioctl_set_xnack_mode(struct file *filep, @@ -3129,7 +3140,11 @@ out: #define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \ [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, \ - .cmd_drv = 0, .name = #ioctl} + .validate = NULL, .cmd_drv = 0, .name = #ioctl} + +#define AMDKFD_IOCTL_DEF_V(ioctl, _func, _validate, _flags) \ + [_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, \ + .validate = _validate, .cmd_drv = 0, .name = #ioctl} /** Ioctl table */ static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = { @@ -3226,7 +3241,8 @@ static const struct amdkfd_ioctl_desc am AMDKFD_IOCTL_DEF(AMDKFD_IOC_SMI_EVENTS, kfd_ioctl_smi_events, 0), - AMDKFD_IOCTL_DEF(AMDKFD_IOC_SVM, kfd_ioctl_svm, 0), + AMDKFD_IOCTL_DEF_V(AMDKFD_IOC_SVM, kfd_ioctl_svm, + kfd_ioctl_svm_validate, 0), AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_XNACK_MODE, kfd_ioctl_set_xnack_mode, 0), @@ -3348,6 +3364,12 @@ static long kfd_ioctl(struct file *filep memset(kdata, 0, usize); } + if (ioctl->validate) { + retcode = ioctl->validate(kdata, usize); + if (retcode) + goto err_i1; + } + retcode = func(filep, process, kdata); if (cmd & IOC_OUT) --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -1028,10 +1028,13 @@ extern struct srcu_struct kfd_processes_ typedef int amdkfd_ioctl_t(struct file *filep, struct kfd_process *p, void *data); +typedef int amdkfd_ioctl_validate_t(void *kdata, unsigned int usize); + struct amdkfd_ioctl_desc { unsigned int cmd; int flags; amdkfd_ioctl_t *func; + amdkfd_ioctl_validate_t *validate; unsigned int cmd_drv; const char *name; };