linux-kernel - fuse freeze and usb devices

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:   Sun, 23 Feb 2020 14:03:41 +0100
From:   "taz.007" <taz.007@...o.com>
To:     linux-kernel@...r.kernel.org
Subject: fuse freeze and usb devices

Hello kernel experts,

I'm experiencing some fuse user space daemon freeze.

I've created a bugzilla entry so I won't repeat all the details, so see 
here:

https://bugzilla.kernel.org/show_bug.cgi?id=206643

TLDR:

mergerfs is stuck inside pread64(). system is idle, manually accessing 
one of the drives via hdparm/ls (or sync) unblocks the syscall and 
mergerfs resumes.

I have no idea which subsystem is responsible for this behaviour, as the 
scenario is a bit complex.

Thanks for your help.

P.S. Add me in CC as I'm not subscribed to the ML.