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[1/4] Revert "cdc-acm: hardening against malicious devices"

Message ID 20200921113525.32187-2-johan@kernel.org
State New
Headers show
Series USB: cdc-acm: handle broken union descriptors | expand

Commit Message

Johan Hovold Sept. 21, 2020, 11:35 a.m. UTC 
This reverts commit 2ad9d544f2497a7bf239c34bd2b86fd19683dbb5.

Drop bogus sanity check; an interface in the active configuration will
always have a current altsetting assigned by USB core.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/class/cdc-acm.c | 5 -----
 1 file changed, 5 deletions(-)
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Patch

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 7f6f3ab5b8a6..e28ac640ff9c 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1196,9 +1196,6 @@  static int acm_probe(struct usb_interface *intf,
 		return -EINVAL;
 	}
 
-	if (!intf->cur_altsetting)
-		return -EINVAL;
-
 	if (!buflen) {
 		if (intf->cur_altsetting->endpoint &&
 				intf->cur_altsetting->endpoint->extralen &&
@@ -1252,8 +1249,6 @@  static int acm_probe(struct usb_interface *intf,
 		dev_dbg(&intf->dev, "no interfaces\n");
 		return -ENODEV;
 	}
-	if (!data_interface->cur_altsetting || !control_interface->cur_altsetting)
-		return -ENODEV;
 
 	if (data_intf_num != call_intf_num)
 		dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");