Package: os-prober Version: 1.72 Severity: grave Justification: renders package unusable; delays Stretch RC2
[ X-D-Cc: Ivo, Colin, Steve ] Hi, Unfortunately my d-i tests didn't catch this issue before uploading d-i and asking Steve to start builds for installation images. When picking plain LVM (not encrypted), os-prober 1.73 hangs right after having printed this to syslog, with slight variations: | 50mount-tests: debug: creating device mapper device /dev/mapper/osprober-linux-sda3 [Steve] | 50mount-tests: debug: creating device mapper device /dev/mapper/osprober-linux-vda5 [Cyril] The issue seems to be the dmsetup create call (with -r and the partition name) getting stuck in the kernel on the dm_ctl_ioctl call, possibly because we're trying to play with something that's mounted already? Looking at commits touching dmsetup stuff, I went back to the first one between 1.71 and 1.72: | commit 8a8f565b43fd126e97b2c390bd81868c6653cf2c | Author: Ivo De Decker <ivo.dedec...@ugent.be> | Date: Sat Jul 13 21:15:41 2013 +0200 | | using read-only device mapper entry and using a version built from it is sufficient to reproduce the hang. Going back one commit: | commit 1f329ff80e5c473414d7c314777d0f667b4004c4 | Author: Ivo De Decker <ivo.dedec...@ugent.be> | Date: Sun Jul 14 13:26:43 2013 +0200 | | log result from mount command is sufficient to get back to a working installer; that is: | Jan 31 04:52:43 os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/vda5 | Jan 31 04:52:43 50mounted-tests: debug: partition /dev/vda5 set to read-only | Jan 31 04:52:43 50mounted-tests: debug: mounting /dev/vda5 as LVM2_member failed: mount: type de système de fichiers « LVM2_member » inconnu | (unknown FS type: LVM2_member) | Jan 31 04:52:43 50mounted-tests: debug: partition /dev/vda5 set to read-write | … | Jan 31 03:52:44 os-prober: debug: os detected by /usr/lib/os-probes/50mounted-tests | Jan 31 03:52:44 os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/vda5 | Jan 31 03:52:44 50mounted-tests: debug: creating device mapper device /dev/mapper/osprober-linux-vda5 | Jan 31 03:52:44 50mounted-tests: debug: mounting /dev/mapper/osprober-linux-vda5 (/dev/vda5) as LVM2_member failed: mount: mounting /dev/mapper/osprober-linux-vda5 on /var/lib/os-prober/mount failed: No such device | Jan 31 03:52:44 50mounted-tests: debug: remove device mapper device /dev/mapper/osprober-linux-vda5 If you want to test stuff, you can fetch images from: http://cdimage.debian.org/cdimage/.stretch_di_rc2/debian-cd/ (at least for the time being.) I've used amd64 netinst, with a 3 GB disc under KVM, initially blank, installing only standard tools. To test locally built packages, I've transfered them when the grub prompt pops up, chrooting to /target and installing them there before resuming the installation. I can (rather) easily test patches if runtime tests are a burden for you folks. A timely fix or at least workaround would be appreciated as udebs are frozen at the moment, and the freeze is only a few days away. KiBi.
