Bug#867067: nfs-kernel-server: nfsdcltrack fails to init database

[Kurt Roeckx <kurt@roeckx.be>]

This problem is still present in buster.

The relevant strace output seems to be:
capget({version=_LINUX_CAPABILITY_VERSION_3, pid=0}, NULL) = 0
capset({version=_LINUX_CAPABILITY_VERSION_3, pid=0}, {effective=0, permitted=0, inheritable=0}) = 0
access("/var/lib/nfs/nfsdcltrack", W_OK) = -1 ENOENT (No such file or directory)
lstat("/var/lib/nfs/nfsdcltrack/main.sqlite", 0x7fffcc2d1530) = -1 ENOENT (No such file or directory)
getpid()                                = 9566
getpid()                                = 9566
openat(AT_FDCWD, "/var/lib/nfs/nfsdcltrack/main.sqlite", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/var/lib/nfs/nfsdcltrack/main.sqlite", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
mkdir("/var/lib/nfs/nfsdcltrack", 0700) = -1 EACCES (Permission denied)

So my understanding is that it's dropping priviledges, and
/var/lib/nfs is owned by statd, but nfsdcltrack is probably run
as root instead.


Kurt