| Message ID | 20211021122944.21816-1-oneukum@suse.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 397430b50a363d8b7bdda00522123f82df6adc5e |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [PATCHv2] usbnet: sanity check for maxpacket | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Single patches do not need cover letters |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Guessed tree name to be net-next |
| netdev/subject_prefix | warning | Target tree name not specified in the subject |
| netdev/cc_maintainers | success | CCed 5 of 5 maintainers |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 10 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/header_inline | success | No static functions without inline keyword in header files |
On Thu, Oct 21, 2021 at 02:29:44PM +0200, Oliver Neukum wrote: > maxpacket of 0 makes no sense and oopses as we need to divide > by it. Give up. > > V2: fixed typo in log and stylistic issues Changelog goes below the --- > Signed-off-by: Oliver Neukum <oneukum@suse.com> > Reported-by: syzbot+76bb1d34ffa0adc03baa@syzkaller.appspotmail.com Again, Reviewed-by: Johan Hovold <johan@kernel.org> > --- > drivers/net/usb/usbnet.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c > index 840c1c2ab16a..80432ee0ce69 100644 > --- a/drivers/net/usb/usbnet.c > +++ b/drivers/net/usb/usbnet.c > @@ -1788,6 +1788,10 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) > if (!dev->rx_urb_size) > dev->rx_urb_size = dev->hard_mtu; > dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); > + if (dev->maxpacket == 0) { > + /* that is a broken device */ > + goto out4; > + } > > /* let userspace know we have a random address */ > if (ether_addr_equal(net->dev_addr, node_id))
Hello: This patch was applied to netdev/net.git (master) by Jakub Kicinski <kuba@kernel.org>: On Thu, 21 Oct 2021 14:29:44 +0200 you wrote: > maxpacket of 0 makes no sense and oopses as we need to divide > by it. Give up. > > V2: fixed typo in log and stylistic issues > > Signed-off-by: Oliver Neukum <oneukum@suse.com> > Reported-by: syzbot+76bb1d34ffa0adc03baa@syzkaller.appspotmail.com > > [...] Here is the summary with links: - [PATCHv2] usbnet: sanity check for maxpacket https://git.kernel.org/netdev/net/c/397430b50a36 You are awesome, thank you!
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index 840c1c2ab16a..80432ee0ce69 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1788,6 +1788,10 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) if (!dev->rx_urb_size) dev->rx_urb_size = dev->hard_mtu; dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1); + if (dev->maxpacket == 0) { + /* that is a broken device */ + goto out4; + } /* let userspace know we have a random address */ if (ether_addr_equal(net->dev_addr, node_id))
maxpacket of 0 makes no sense and oopses as we need to divide by it. Give up. V2: fixed typo in log and stylistic issues Signed-off-by: Oliver Neukum <oneukum@suse.com> Reported-by: syzbot+76bb1d34ffa0adc03baa@syzkaller.appspotmail.com --- drivers/net/usb/usbnet.c | 4 ++++ 1 file changed, 4 insertions(+)