Download/criu/1.8

Tarball:	criu-1.8.tar.bz2
Version:	1.8
Released:	7 Dec 2015
GIT tag:	v1.8

New features

• Ability to check CRIU features via RPC
• New zdtm.py test suite
• Pre-dump and pre-restore action scripts
• The "info" action in CRIT showing stats about image file
• More user-friendly output by CRIT
• Python API -- pycriu
• Ability to add custom paths to irmap scan
• C/R of
  • read-only bind mounts
  • IPv6 routes and iptables rules
  • ip rules (it ip tool supports such)
  • ignore_routes_with_linkdown netns devconf
  • empty bridges in netns
  • FILTER mode of seccomp
  • IP_FREEBIND socket option

Optimizations/improvements

• Shared pie/non-pie .c files are built two times with proper flags
• VDSO code re-shuffled for better re-use between arches
• Failures of action scripts are reported in logs
• OpenVZ's VENET handling is tuned to fit the current kernel state
• Do not use hardcoded /dev/rts maj:min numbers
• Unsupported socket protocols are reported at expected place
• Slightly faster access to /proc files by using O_PATH open mode
• Improved page-server dump speed by keeping control over the Nagle algorithm
• Read pages.img in more optimal manner rather than page-by-page
• Less "Error"-s in logs, that actually don't lead to errors
• Slightly faster /proc/pid/status parsing
• Dead/live-locks on internal criu locks now emits a warning into logs

Fixes

• Page server flooded node with tw buckets during migration
• Turned off cgroups controllers weren't detected as such
• Netns sysctls from old images weren't properly restored
• Running process could be mistakenly stopped after --leave-running dump
• Helper processes run by CRIU produced fake error messages in logs
• Error code from sigaction restore could be missed
• Several potential buffers overruns due to missed '\0' after strcpy-s existed
• Killed processes after dump survived in zombie state for some time holding PIDs and resources
• If task had MANY children, the latter could be skipped on dump
• Task dying while being frozen could fail the dump
• On Aarch64 the upper limit for user memory was not properly detected sometimes
• Guess for TCP buffer max segment size was too optimistic (could fail the restore on low-mem machines)
• CRIT didn't decode userns images
• Ghost files were left in the FS tree after failed restore (blocking the next restore attempt)
• Some log messages from pie code were lost
• Some net/ipc/uts sysctls failed to restore in userns
• Move tasks int cgroups failed in userns
• Unsupported filesystems silently failed the dump
• External tmpfs (and some other) mounts generated tarballs with their contents
• Privately mapped files were picked from wrong mount namespace
• Controlling tty could be restored on wrong tty end
• Tmpfs mount of sub-namespace was restored from wrong image file
• Potential stack overflow in libcriu
• Partially-restored tasks could be left after failed restore
• In-container TCP connection sometimes failed to restore
• Race in sending SIGSTOP vs dump might cause dump to fail
• Post-restore actions could generate stats files in wrong directories
• Freeze-cgroup didn't take sub-cgroups' tasks into account
• Tentative state in IPv6 sockets binding prevented socket from being bound immediately
• Restoring from images with files pointing to /proc file of dead tasks could crash
• Tasks with STOP in queue (i.e. -- not yet stopped) were CONT-ed in case of --leave-running dump
• Stopped task with one more STOP in queue caused dump to stuck

Security

• Service run as root could allow users to violate ptrace policies
• Service run as root could give users access to privileged files and directories