Created attachment 1392120 [details] dmesg Description of problem: plugin in a new dvb usb device produces "BUG: unable to handle kernel NULL pointer dereference at ..." Version-Release number of selected component (if applicable): kernel: 4.14.16-300.fc27.x86_64 Additional info: dvb usb device: TechnoTrend AG TT-connect S2-4600 wiki: https://www.linuxtv.org/wiki/index.php/TechnoTrend_TT-connect_S2-4600
Created attachment 1392121 [details] lsusb
mailed to linux-media.org https://www.mail-archive.com/linux-media@vger.kernel.org/msg125726.html
maybe important: tried to run the device in vbox with fedora 23 ( => an elder kernel: 4.2.3) this kernel displays: ... [ 940.053224] kernel tried to execute NX-protected page - exploit attempt? (uid: 0) ... dmesg attached
Created attachment 1392847 [details] dmesg with kernel 4.2.3 (Fedora 23)
We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. As kernel maintainers, we try to keep up with bugzilla but due the rate at which the upstream kernel project moves, bugs may be fixed without any indication to us. Due to this, we are doing a mass bug update across all of the Fedora 27 kernel bugs. Fedora 27 has now been rebased to 4.15.3-300.f27. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you experience different issues, please open a new bug report for those.
I can't provide anymore info's regarding this problem. I bought and test different devices with the same chips - TerraTec Cinergy S2 - TechnoTrend TT-connect S2-4600 see https://www.linuxtv.org/wiki/index.php/DVB-S2_USB_Devices both had the same bugs, so I send them back to the seller. I brought this on linux-media list to attention and the bug is already in kernel bugzilla: https://www.mail-archive.com/linux-media@vger.kernel.org/msg125726.html https://bugzilla.kernel.org/show_bug.cgi?id=118101
Going to close this as insufficient data as we don't have any way to confirm it. If someone else hits it, they can reopen. Thanks for filing upstream!