Package: udev Version: 175-7 Severity: grave Tags: d-i Justification: causes non-serious data loss
Dear Maintainer, I have experienced problems with udev's creation of links in /dev/disk/by-path on multiple machines (real and virtual) including missing links and incorrect links (ie, two partition-type links having the same path up through partition number, but pointing to different drives). This latter issue is of grave concern, since anyone using /dev/disk/by-path runs a chance of operating on the wrong block device (this almost happened to me). The gravity of this situation is increased due to at least ZoL (ZFS on Linux) recommending that /dev/disk/by-path naming be used for zpool creation; they're also plausibly used in /etc/fstab etc. I can trivially reproduce the problem by launching a KVM with three virtual disks ala (for some disk image passed as $1) KVMOPTS="$KVMOPTS -drive file=$1-1 -drive file=$1-2" kvm --hda "$1" -drive file="$2",if=none,id=b,boot=on -m $MEM -usb -device usb- storage,drive=b $KVMOPTS sda and sdb will have valid links in /dev/disk/by-path, while sdc will not have a link. a more complex example, illustrating the dangerous crosslinking, can be found here: https://groups.google.com/a/zfsonlinux.org/forum/?fromgroups=#!search/by-path /zfs-devel/gQ5jzweYqYU/RMXiBM3x-8oJ there's extensive logging and discussion in that thread. I'm using a custom 3.5.3 kernel. I can and will try with a default Debian kernel, but wanted to get the ball rolling on this. Thanks! -- System Information: Debian Release: turing-β/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 3.5.3 (SMP w/8 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages udev depends on: ii debconf [debconf-2.0] 1.5.46 ii libc6 2.13-35 ii libselinux1 2.1.9-5 ii libudev0 175-7 ii lsb-base 4.1+Debian7 ii procps 1:3.3.3-2 ii util-linux 2.21.793-2 Versions of packages udev recommends: ii pciutils 1:3.1.9-5 ii usbutils 1:005-3 udev suggests no packages. -- debconf information: udev/new_kernel_needed: false udev/title/upgrade: udev/reboot_needed: udev/sysfs_deprecated_incompatibility: -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
