[pkg-cryptsetup-devel] Bug#762032: cryptsetup: cryptroot fails on lvm if device isn't ready in time

[Niall Walsh]

Package: cryptsetup
Version: 2:1.6.6-1
Severity: normal

With the rootfs on lvm on crypt on lvm on a usb device the system can (will) fail to boot if the usb device has not appeared in time.

The lvm initramfs-tools script will just call lvm lvchange for the root device, but in this case the root device is /dev/mapper/cryptvg-root which cannot be seen until the crypt device has been setup.

The cryptsetup initramfs-tools script will run activate_vg if the cryptsource does not exist, but if the device it is on is not present yet this won't help.

If the cryptsouce still does not exist then the rootdelay loop will be run, but this does nothing more then wait for the device to appear.  Simply adding activate_vg inside this loop (e.g. on the line after the "/bin/sleep 0.1") will make the system bring up the prompt for the crypt devices password and then boot up.   The debsums error below is due to that addition.

The above "fix" creates a lot of noise as each loop before the device appears will trigger a couple of lines of "no volume groups found".

Sorry if I missed anything and thanks for your work,

Niall

-- Package-specific info:
-- /proc/cmdline
BOOT_IMAGE=/vmlinuz-3.16-2.slh.3-aptosid-amd64 root=/dev/mapper/cryptvg-root ro cryptopts=source=/dev/mapper/vg-crypt,target=cryptroot,lvm=cryptvg-root quiet

-- /etc/crypttab
# <target name>	<source device>		<key file>	<options>
cryptroot	/dev/mapper/vg-crypt	none	luks

-- /etc/fstab
UUID=47120949-a8f4-46a2-9abc-98fc6279a912     /boot                ext4         defaults,relatime,errors=remount-ro           0    2   
UUID=6d78821a-9796-4fa4-b643-64b67e73d31a     /                    ext4         defaults,relatime,errors=remount-ro           0    1   

-- lsmod
Module                  Size  Used by
cpufreq_stats           3535  0 
cpufreq_conservative     6616  0 
cpufreq_powersave        982  0 
af_packet              29254  2 
intel_agp              11016  0 
bochs_drm              15505  2 
ttm                    62823  1 bochs_drm
drm_kms_helper         41134  1 bochs_drm
drm                   233783  5 ttm,bochs_drm,drm_kms_helper
syscopyarea             3438  1 bochs_drm
sysfillrect             3674  1 bochs_drm
sysimgblt               2159  1 bochs_drm
i2c_piix4               8649  0 
fuse                   78742  1 
i2c_core               21182  3 drm,i2c_piix4,drm_kms_helper
intel_gtt              12280  1 intel_agp
pcspkr                  1891  0 
processor              23745  0 
evdev                  11032  4 
pvpanic                 1675  0 
psmouse                85762  0 
serio_raw               4393  0 
button                  4568  0 
parport_pc             29663  1 
ppdev                   5638  0 
lp                      9883  0 
parport                29749  3 lp,ppdev,parport_pc
autofs4                22913  2 
ext4                  343217  2 
crc16                   1319  1 ext4
jbd2                   58309  1 ext4
mbcache                 8795  1 ext4
xts                     3063  1 
gf128mul                5722  1 xts
algif_skcipher          6091  0 
af_alg                  4916  1 algif_skcipher
sd_mod                 38684  2 
crc_t10dif              1095  1 sd_mod
crct10dif_generic       1429  1 
crct10dif_common        1332  2 crct10dif_generic,crc_t10dif
uas                    16266  0 
usb_storage            47348  2 uas
dm_crypt               16399  1 
dm_mod                 80028  12 dm_crypt
md_mod                102656  0 
sg                     22108  0 
sr_mod                 14871  0 
cdrom                  27134  1 sr_mod
ata_generic             3394  0 
pata_acpi               3283  0 
xhci_hcd               99281  0 
ehci_pci                3624  0 
ehci_hcd               42430  1 ehci_pci
usbcore               163179  5 uas,usb_storage,ehci_hcd,ehci_pci,xhci_hcd
ata_piix               24944  0 
usb_common              1608  1 usbcore
libata                166437  3 pata_acpi,ata_generic,ata_piix
e1000                 101292  0 
scsi_mod              153282  6 sg,uas,usb_storage,libata,sd_mod,sr_mod
floppy                 58764  0 


-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16-2.slh.3-aptosid-amd64 (SMP w/6 CPU cores; PREEMPT)
Locale: LANG=en_IE.utf8, LC_CTYPE=en_IE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages cryptsetup depends on:
ii  cryptsetup-bin         2:1.6.6-1
ii  debconf [debconf-2.0]  1.5.53
ii  dmsetup                2:1.02.90-1
ii  libc6                  2.19-11

Versions of packages cryptsetup recommends:
ii  busybox                                 1:1.22.0-8
ii  console-setup                           1.112
ii  initramfs-tools [linux-initramfs-tool]  0.116
ii  kbd                                     1.15.5-1

Versions of packages cryptsetup suggests:
ii  dosfstools              3.0.26-3
pn  keyutils                <none>
ii  liblocale-gettext-perl  1.05-8+b1

-- debconf information:
  cryptsetup/prerm_active_mappings: true

-- debsums errors found:
debsums: changed file /usr/share/initramfs-tools/scripts/local-top/cryptroot (from cryptsetup package)