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cr-check: fill up a root task mount namespace
A root mount namespace list is used to resolve paths to unix sockets if they are placed on btrfs. This patch fixes a crash: #0 mount_resolve_path at criu/mount.c:213 #1 phys_stat_resolve_dev at criu/mount.c:240 #2 phys_stat_dev_match at criu/mount.c:256 checkpoint-restore#3 unix_process_name at criu/sk-unix.c:565 checkpoint-restore#4 unix_collect_one at criu/sk-unix.c:620 checkpoint-restore#5 unix_receive_one at criu/sk-unix.c:692 checkpoint-restore#6 nlmsg_receive at criu/libnetlink.c:45 checkpoint-restore#7 do_rtnl_req at criu/libnetlink.c:119 checkpoint-restore#8 do_collect_req at criu/sockets.c:610 checkpoint-restore#9 collect_sockets at criu/sockets.c:636 https://bugzilla.redhat.com/show_bug.cgi?id=1381351 Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
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