修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/drivers/scsi/scsi_proc.c
..
..
@@ -311,7 +311,7 @@
311
311
 			       size_t length, loff_t *ppos)
312
312
 {
313
313
 	int host, channel, id, lun;
314
-	char *buffer, *p;
314
+	char *buffer, *end, *p;
315
315
 	int err;
316
316
 
317
317
 	if (!buf || length > PAGE_SIZE)
..
..
@@ -326,10 +326,14 @@
326
326
 		goto out;
327
327
 
328
328
 	err = -EINVAL;
329
-	if (length < PAGE_SIZE)
330
-		buffer[length] = '\0';
331
-	else if (buffer[PAGE_SIZE-1])
332
-		goto out;
329
+	if (length < PAGE_SIZE) {
330
+		end = buffer + length;
331
+		*end = '\0';
332
+	} else {
333
+		end = buffer + PAGE_SIZE - 1;
334
+		if (*end)
335
+			goto out;
336
+	}
333
337
 
334
338
 	/*
335
339
 	 * Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi
..
..
@@ -338,10 +342,10 @@
338
342
 	if (!strncmp("scsi add-single-device", buffer, 22)) {
339
343
 		p = buffer + 23;
340
344
 
341
-		host = simple_strtoul(p, &p, 0);
342
-		channel = simple_strtoul(p + 1, &p, 0);
343
-		id = simple_strtoul(p + 1, &p, 0);
344
-		lun = simple_strtoul(p + 1, &p, 0);
345
+		host    = (p     < end) ? simple_strtoul(p, &p, 0) : 0;
346
+		channel = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0;
347
+		id      = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0;
348
+		lun     = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0;
345
349
 
346
350
 		err = scsi_add_single_device(host, channel, id, lun);
347
351
 
..
..
@@ -352,10 +356,10 @@
352
356
 	} else if (!strncmp("scsi remove-single-device", buffer, 25)) {
353
357
 		p = buffer + 26;
354
358
 
355
-		host = simple_strtoul(p, &p, 0);
356
-		channel = simple_strtoul(p + 1, &p, 0);
357
-		id = simple_strtoul(p + 1, &p, 0);
358
-		lun = simple_strtoul(p + 1, &p, 0);
359
+		host    = (p     < end) ? simple_strtoul(p, &p, 0) : 0;
360
+		channel = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0;
361
+		id      = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0;
362
+		lun     = (p + 1 < end) ? simple_strtoul(p + 1, &p, 0) : 0;
359
363
 
360
364
 		err = scsi_remove_single_device(host, channel, id, lun);
361
365
 	}