linux-kernel - Problems with uio_pci

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 for Android: free password hash cracker in your pocket

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

Message-ID: <21BF98B1-0EA5-46BC-BC68-196190880087@intel.com>
Date:   Fri, 10 Aug 2018 21:12:19 +0000
From:   "Harris, James R" <james.r.harris@...el.com>
To:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "xiubli@...hat.com" <xiubli@...hat.com>
CC:     "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        "Jiang, Dave" <dave.jiang@...el.com>,
        "Walker, Benjamin" <benjamin.walker@...el.com>,
        "Wodkowski, PawelX" <pawelx.wodkowski@...el.com>
Subject: Problems with uio_pci_generic in v4.18-rc8

Hi,

Using Linux kernel v4.18-rc8, I am unable to bind a PCI device to uio_pci_generic.  This works fine with v4.18-rc4.  dmesg shows:

[  336.221585] genirq: Threaded irq requested with handler=NULL and !ONESHOT for irq 33
[  336.221681] uio_pci_generic: probe of 0000:04:00.0 failed with error -22

This problem has been reproduced on multiple systems.

This seems to be related to commit 9421e45f5 (“uio: use request_threaded_irq instead”) which was merged in -rc5.  Reverting this commit fixes the issue (I also reverted 543af5861f and 57c5f4df0a which also touch uio.c - just to be safe).

This seems like a serious regression to uio_pci_generic, but any tips or pointers would be appreciated.

Thanks,

Jim Harris