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gpu: nvgpu: Minor fixes in ioctl handling

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Fixes:
1) gk20a_sched_dev_ioctl allocates a buffer with size
*CTXSW_IOCTL_MAX_ARG_SIZE* but then sanitizes IOC_SIZE
against *SCHED_IOCTL_MAX_ARG_SIZE*. No big deal here
since both are of size 0x20 but may lead to issues in
the future.
2) nvgpu_clk_arb_ioctl_event_dev would BUG_ON if IOC_SIZE
is larger than expected. Let's instead sanitize and return
error.

Jira VFND-1586
Jira VQRM-3741

Change-Id: I9e00796a2b2f4a83c3a04194c34eb4c006b937d3
Signed-off-by: Martin Radev <mradev@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2525753
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-by: svc_kernel_abi <svc_kernel_abi@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Martin Radev
2021-05-06 16:15:00 +03:00
committed by mobile promotions
parent e0a1fcf5f5
commit 04ce9faf04
2 changed files with 5 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/nvgpu/os/linux/ioctl_clk_arb.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2016-2020, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2016-2021, NVIDIA CORPORATION. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
@@ -253,11 +253,10 @@ static long nvgpu_clk_arb_ioctl_event_dev(struct file *filp, unsigned int cmd,
nvgpu_log(g, gpu_dbg_fn, "nr=%d", _IOC_NR(cmd));
if ((_IOC_TYPE(cmd) != NVGPU_EVENT_IOCTL_MAGIC) || (_IOC_NR(cmd) == 0)
|| (_IOC_NR(cmd) > NVGPU_EVENT_IOCTL_LAST))
|| (_IOC_NR(cmd) > NVGPU_EVENT_IOCTL_LAST)
|| (_IOC_SIZE(cmd) > NVGPU_EVENT_IOCTL_MAX_ARG_SIZE))
return -EINVAL;
BUG_ON(_IOC_SIZE(cmd) > NVGPU_EVENT_IOCTL_MAX_ARG_SIZE);
(void) memset(buf, 0, sizeof(buf));
if (_IOC_DIR(cmd) & _IOC_WRITE) {
if (copy_from_user(buf, (void __user *) arg, _IOC_SIZE(cmd)))

4
drivers/gpu/nvgpu/os/linux/sched.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2016-2020, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2016-2021, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -435,7 +435,7 @@ long gk20a_sched_dev_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct gk20a *g = filp->private_data;
u8 buf[NVGPU_CTXSW_IOCTL_MAX_ARG_SIZE];
u8 buf[NVGPU_SCHED_IOCTL_MAX_ARG_SIZE];
int err = 0;
nvgpu_log(g, gpu_dbg_fn | gpu_dbg_sched, "nr=%d", _IOC_NR(cmd));