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UPSTREAM: Input: pegasus-notetaker - check pipe type when probing

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commit b3d80fd27a upstream.

Fix WARNING in pegasus_open/usb_submit_urb
Syzbot bug: https://syzkaller.appspot.com/bug?id=bbc107584dcf3262253ce93183e51f3612aaeb13

Warning raised because pegasus_driver submits transfer request for
bogus URB (pipe type does not match endpoint type). Add sanity check at
probe time for pipe value extracted from endpoint descriptor. Probe
will fail if sanity check fails.

Reported-and-tested-by: syzbot+04ee0cb4caccaed12d78@syzkaller.appspotmail.com
Change-Id: Iedb606676db9329b44bc530edf017c80f4fa4263
Signed-off-by: Soumya Negi <soumya.negi97@gmail.com>
Link: https://lore.kernel.org/r/20230404074145.11523-1-soumya.negi97@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 342c1db4fa)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Soumya Negi
2023-04-09 19:12:04 -07:00
committed by Treehugger Robot
parent 6bf110bb7a
commit 690f3e949d
1 changed files with 6 additions and 0 deletions
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6
drivers/input/tablet/pegasus_notetaker.c
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@@ -296,6 +296,12 @@ static int pegasus_probe(struct usb_interface *intf,
pegasus->intf = intf;
pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
/* Sanity check that pipe's type matches endpoint's type */
if (usb_pipe_type_check(dev, pipe)) {
error = -EINVAL;
goto err_free_mem;
}
pegasus->data_len = usb_maxpacket(dev, pipe);
pegasus->data = usb_alloc_coherent(dev, pegasus->data_len, GFP_KERNEL,