From: Oliver Neukum <oneukum@suse.com> stable inclusion from stable-v6.6.100 commit 5dd6a441748dad2f02e27b256984ca0b2d4546b6 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICPD6S CVE: CVE-2025-38474 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 4c4ca3c46167518f8534ed70f6e3b4bf86c4d158 ] 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.c... 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> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Ziming Du <duziming2@huawei.com> --- drivers/net/usb/sierra_net.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/usb/sierra_net.c b/drivers/net/usb/sierra_net.c index 673d3aa837926..42b66adb35f1b 100644 --- a/drivers/net/usb/sierra_net.c +++ b/drivers/net/usb/sierra_net.c @@ -689,6 +689,10 @@ static int sierra_net_bind(struct usbnet *dev, struct usb_interface *intf) status); return -ENODEV; } + if (!dev->status) { + dev_err(&dev->udev->dev, "No status endpoint found"); + return -ENODEV; + } /* Initialize sierra private data */ priv = kzalloc(sizeof *priv, GFP_KERNEL); if (!priv) -- 2.43.0