tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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usb: net: sierra: check for no status endpoint

The driver checks for having three endpoints and
having bulk in and out endpoints, but not that
the third endpoint is interrupt input.
Rectify the omission.

Reported-by: syzbot+3f89ec3d1d0842e95d50@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-usb/686d5a9f.050a0220.1ffab7.0017.GAE@google.com/
Tested-by: syzbot+3f89ec3d1d0842e95d50@syzkaller.appspotmail.com
Fixes: eb4fd8cd355c8 ("net/usb: add sierra_net.c driver")
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Link: https://patch.msgid.link/20250714111326.258378-1-oneukum@suse.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

authored by

Oliver Neukum and committed by
Jakub Kicinski 4c4ca3c4 0e941896

+4
+4
drivers/net/usb/sierra_net.c
··· 689 689 status); 690 690 return -ENODEV; 691 691 } 692 + if (!dev->status) { 693 + dev_err(&dev->udev->dev, "No status endpoint found"); 694 + return -ENODEV; 695 + } 692 696 /* Initialize sierra private data */ 693 697 priv = kzalloc(sizeof *priv, GFP_KERNEL); 694 698 if (!priv)