drivers/soundwire/qcom.c:1269 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
From: Dan Carpenter
Date: Sat May 20 2023 - 04:35:28 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d635f6cc934bcd467c5d67148ece74632fd96abf
commit: 2367e0ecb498764e95cfda691ff0828f7d25f9a4 soundwire: qcom: gracefully handle too many ports in DT
config: ia64-randconfig-m041-20230514
compiler: ia64-linux-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Reported-by: Dan Carpenter <error27@xxxxxxxxx>
| Closes: https://lore.kernel.org/r/202305201301.sCJ8UDKV-lkp@xxxxxxxxx/
New smatch warnings:
drivers/soundwire/qcom.c:1269 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
Old smatch warnings:
drivers/soundwire/qcom.c:1270 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
drivers/soundwire/qcom.c:1271 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
drivers/soundwire/qcom.c:1272 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
drivers/soundwire/qcom.c:1273 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
drivers/soundwire/qcom.c:1274 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
drivers/soundwire/qcom.c:1275 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
drivers/soundwire/qcom.c:1276 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
drivers/soundwire/qcom.c:1277 qcom_swrm_get_port_config() error: buffer overflow 'ctrl->pconfig' 14 <= 14
vim +1269 drivers/soundwire/qcom.c
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1183 static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl)
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1184 {
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1185 struct device_node *np = ctrl->dev->of_node;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1186 u8 off1[QCOM_SDW_MAX_PORTS];
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1187 u8 off2[QCOM_SDW_MAX_PORTS];
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1188 u8 si[QCOM_SDW_MAX_PORTS];
5ffba1fb6d55555 Srinivas Kandagatla 2020-09-17 1189 u8 bp_mode[QCOM_SDW_MAX_PORTS] = { 0, };
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1190 u8 hstart[QCOM_SDW_MAX_PORTS];
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1191 u8 hstop[QCOM_SDW_MAX_PORTS];
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1192 u8 word_length[QCOM_SDW_MAX_PORTS];
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1193 u8 blk_group_count[QCOM_SDW_MAX_PORTS];
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1194 u8 lane_control[QCOM_SDW_MAX_PORTS];
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1195 int i, ret, nports, val;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1196
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1197 ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val);
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1198
9972b90ae8fd9bc Vinod Koul 2020-09-03 1199 ctrl->num_dout_ports = FIELD_GET(SWRM_COMP_PARAMS_DOUT_PORTS_MASK, val);
9972b90ae8fd9bc Vinod Koul 2020-09-03 1200 ctrl->num_din_ports = FIELD_GET(SWRM_COMP_PARAMS_DIN_PORTS_MASK, val);
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1201
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1202 ret = of_property_read_u32(np, "qcom,din-ports", &val);
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1203 if (ret)
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1204 return ret;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1205
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1206 if (val > ctrl->num_din_ports)
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1207 return -EINVAL;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1208
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1209 ctrl->num_din_ports = val;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1210
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1211 ret = of_property_read_u32(np, "qcom,dout-ports", &val);
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1212 if (ret)
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1213 return ret;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1214
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1215 if (val > ctrl->num_dout_ports)
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1216 return -EINVAL;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1217
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1218 ctrl->num_dout_ports = val;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1219
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1220 nports = ctrl->num_dout_ports + ctrl->num_din_ports;
2367e0ecb498764 Krzysztof Kozlowski 2023-02-22 1221 if (nports > QCOM_SDW_MAX_PORTS)
nports is capped at 14.
2367e0ecb498764 Krzysztof Kozlowski 2023-02-22 1222 return -EINVAL;
2367e0ecb498764 Krzysztof Kozlowski 2023-02-22 1223
650dfdb894f0f2b Srinivas Kandagatla 2021-03-15 1224 /* Valid port numbers are from 1-14, so mask out port 0 explicitly */
650dfdb894f0f2b Srinivas Kandagatla 2021-03-15 1225 set_bit(0, &ctrl->dout_port_mask);
650dfdb894f0f2b Srinivas Kandagatla 2021-03-15 1226 set_bit(0, &ctrl->din_port_mask);
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1227
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1228 ret = of_property_read_u8_array(np, "qcom,ports-offset1",
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1229 off1, nports);
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1230 if (ret)
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1231 return ret;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1232
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1233 ret = of_property_read_u8_array(np, "qcom,ports-offset2",
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1234 off2, nports);
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1235 if (ret)
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1236 return ret;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1237
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1238 ret = of_property_read_u8_array(np, "qcom,ports-sinterval-low",
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1239 si, nports);
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1240 if (ret)
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1241 return ret;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1242
5ffba1fb6d55555 Srinivas Kandagatla 2020-09-17 1243 ret = of_property_read_u8_array(np, "qcom,ports-block-pack-mode",
5ffba1fb6d55555 Srinivas Kandagatla 2020-09-17 1244 bp_mode, nports);
da096fbccd52803 Srinivas Kandagatla 2021-05-04 1245 if (ret) {
208a03ee9db815f Krzysztof Kozlowski 2023-02-22 1246 if (ctrl->version <= SWRM_VERSION_1_3_0)
da096fbccd52803 Srinivas Kandagatla 2021-05-04 1247 memset(bp_mode, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
da096fbccd52803 Srinivas Kandagatla 2021-05-04 1248 else
a5943e4fb14e36d Pierre-Louis Bossart 2021-03-02 1249 return ret;
da096fbccd52803 Srinivas Kandagatla 2021-05-04 1250 }
a5943e4fb14e36d Pierre-Louis Bossart 2021-03-02 1251
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1252 memset(hstart, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1253 of_property_read_u8_array(np, "qcom,ports-hstart", hstart, nports);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1254
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1255 memset(hstop, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1256 of_property_read_u8_array(np, "qcom,ports-hstop", hstop, nports);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1257
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1258 memset(word_length, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1259 of_property_read_u8_array(np, "qcom,ports-word-length", word_length, nports);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1260
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1261 memset(blk_group_count, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1262 of_property_read_u8_array(np, "qcom,ports-block-group-count", blk_group_count, nports);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1263
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1264 memset(lane_control, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1265 of_property_read_u8_array(np, "qcom,ports-lane-control", lane_control, nports);
128eaf937adb87a Srinivas Kandagatla 2021-03-30 1266
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1267 for (i = 0; i < nports; i++) {
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 1268 /* Valid port number range is from 1-14 */
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 @1269 ctrl->pconfig[i + 1].si = si[i];
But this is doing i + 1 so it's one past the end.
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 1270 ctrl->pconfig[i + 1].off1 = off1[i];
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 1271 ctrl->pconfig[i + 1].off2 = off2[i];
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 1272 ctrl->pconfig[i + 1].bp_mode = bp_mode[i];
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 1273 ctrl->pconfig[i + 1].hstart = hstart[i];
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 1274 ctrl->pconfig[i + 1].hstop = hstop[i];
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 1275 ctrl->pconfig[i + 1].word_length = word_length[i];
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 1276 ctrl->pconfig[i + 1].blk_group_count = blk_group_count[i];
9916c02ccd74e67 Srinivas Kandagatla 2021-04-01 1277 ctrl->pconfig[i + 1].lane_control = lane_control[i];
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1278 }
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1279
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1280 return 0;
02efb49aa805cee Srinivas Kandagatla 2020-01-13 1281 }
--
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