3:06 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 28806e4d9b97865b450d72156e9ad229f2067f0b
commit: ecaafb7b5ab6406587341d8727f237b3ee00dedf drm/amdgpu: Add secure display TA
interface
date: 8 weeks ago
compiler: alpha-linux-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
> drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c:141:37:
warning: Undefined behavior: Variable 'i2c_output' is used as parameter and
destination in s[n]printf(). [sprintfOverlappingData]
sprintf(i2c_output,
"%s 0x%X", i2c_output,
^
vim +/i2c_output +141 drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c
85
86 static ssize_t amdgpu_securedisplay_debugfs_write(struct file *f, const char __user
*buf,
87 size_t size, loff_t *pos)
88 {
89 struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
90 struct psp_context *psp = &adev->psp;
91 struct securedisplay_cmd *securedisplay_cmd;
92 struct drm_device *dev = adev_to_drm(adev);
93 uint32_t phy_id;
94 uint32_t op;
95 int i;
96 char str[64];
97 char i2c_output[256];
98 int ret;
99
100 if (*pos || size > sizeof(str) - 1)
101 return -EINVAL;
102
103 memset(str, 0, sizeof(str));
104 ret = copy_from_user(str, buf, size);
105 if (ret)
106 return -EFAULT;
107
108 ret = pm_runtime_get_sync(dev->dev);
109 if (ret < 0) {
110 pm_runtime_put_autosuspend(dev->dev);
111 return ret;
112 }
113
114 if (size < 3)
115 sscanf(str, "%u ", &op);
116 else
117 sscanf(str, "%u %u", &op, &phy_id);
118
119 switch (op) {
120 case 1:
121 psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd,
122 TA_SECUREDISPLAY_COMMAND__QUERY_TA);
123 ret = psp_securedisplay_invoke(psp, TA_SECUREDISPLAY_COMMAND__QUERY_TA);
124 if (!ret) {
125 if (securedisplay_cmd->status == TA_SECUREDISPLAY_STATUS__SUCCESS)
126 dev_info(adev->dev, "SECUREDISPLAY: query securedisplay TA ret is
0x%X\n",
127 securedisplay_cmd->securedisplay_out_message.query_ta.query_cmd_ret);
128 else
129 psp_securedisplay_parse_resp_status(psp, securedisplay_cmd->status);
130 }
131 break;
132 case 2:
133 psp_prep_securedisplay_cmd_buf(psp, &securedisplay_cmd,
134 TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC);
135 securedisplay_cmd->securedisplay_in_message.send_roi_crc.phy_id = phy_id;
136 ret = psp_securedisplay_invoke(psp, TA_SECUREDISPLAY_COMMAND__SEND_ROI_CRC);
137 if (!ret) {
138 if (securedisplay_cmd->status == TA_SECUREDISPLAY_STATUS__SUCCESS) {
139 memset(i2c_output, 0, sizeof(i2c_output));
140 for (i = 0; i < TA_SECUREDISPLAY_I2C_BUFFER_SIZE; i++)
141 sprintf(i2c_output, "%s 0x%X", i2c_output,
142 securedisplay_cmd->securedisplay_out_message.send_roi_crc.i2c_buf[i]);
143 dev_info(adev->dev, "SECUREDISPLAY: I2C buffer out put is :%s\n",
i2c_output);
144 } else {
145 psp_securedisplay_parse_resp_status(psp, securedisplay_cmd->status);
146 }
147 }
148 break;
149 default:
150 dev_err(adev->dev, "Invalid input: %s\n", str);
151 }
152
153 pm_runtime_mark_last_busy(dev->dev);
154 pm_runtime_put_autosuspend(dev->dev);
155
156 return size;
157 }
158
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