Date: Wed, 21 Mar 2018 12:22:53 +0100 From: Hans Petter Selasky <hps@selasky.org> To: "Hartmann, O." <ohartmann@walstatt.org>, FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: Re: CURRENT r331284: crashing with USB Message-ID: <237b6b65-ab80-1193-d91d-11de089b737a@selasky.org> In-Reply-To: <20180321120710.4eb3b944@hermann> References: <20180321120710.4eb3b944@hermann>
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On 03/21/18 12:07, Hartmann, O. wrote: > Hello. > > Incident: CURRENT r331284 can be brought down reliably with an USB > flash drive plugged in and out without mounting or doing anything with > it. > > I first recognized the incident with a ZFS on a SanDisk 32GB USB 3.0 > flash drive. Plugging the USB flash and typing "zpool import" revealed > the very first time I issue this command the existence of the ZFS > fielsystem. Usually, I import then this USB drive for maintenance > purposes. Now, typing "zpool import" a second time, nothing is shown at > all. I see that umass0 has been destroyed - although the USB drive is > still plugged in. > > Pulling the USB flash drive without having actually imported the > ZFS makes CURRENT crash and reboot. > > I tried different USB flash drives, 3.0, 2.0, different boxes running > CURRENT, different hardware (Notebooks, Fujitsu workstations, HP > servers). It seems that the USB subsystem does have a serious problem - > not the ZFS. I can plugin the USB and then unplug it and after two or > three times doing this, the box goes down. > > > Does anyone else observe this bug? > > By the way: all ZFS USB drives I use or all other USB flash drives > cause no problem on FreeBSD 11.1-RELENG-p7! > I've seen something similar, but I thought the issue was fixed by: https://reviews.freebsd.org/D14456 --HPS
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