ext4 encrypted dir becomes sickish after 4-5 days

From	Toralf Förster <toralf.foerster@gmx.de>
Newsgroups	linux.kernel
Subject	ext4 encrypted dir becomes sickish after 4-5 days
Date	2016-09-14 11:50 +0200
Message-ID	<sheZk-7DT-17@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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I do run a hardened stable Gentoo Linux server w/ kernel 4.7.3-ahrdened-r1 where I use an ext4fs directory /var/lib/tor in the following way :

	scp ~/.cryptoSalt user@host:/tmp
	cat /tmp/.cryptoPass | ssh user@host 'sudo -u tor e4crypt add_key -S $(cat /tmp/.cryptoSalt) /var/lib/tor && sudo /etc/init.d/tor start; rm /tmp/.cryptoSalt'

Works fine after reboot.

But after 4 days or so a restart of the service "tor" fails with messages like :

Sep 14 11:27:10.000 [warn] Could not open "/var/lib/tor/data/keys/secret_id_key": Required key not available
Sep 14 11:27:10.000 [warn] Error reading private key from "/var/lib/tor/data/keys/secret_id_key"
Sep 14 11:27:10.000 [err] Error loading private key.
Sep 14 11:27:10.000 [err] Error initializing keys; exiting
Sep 14 11:27:10.000 [warn] Couldn't open "/var/lib/tor/data/state.tmp" (/var/lib/tor/data/state) for writing: Required key not available
Sep 14 11:27:10.000 [warn] Unable to write state to file "/var/lib/tor/data/state"; will try again later

No way to get it repaired other than rebooting the machine.

Any hints  ?

-- 
Toralf
PGP: C4EACDDE 0076E94E, OTR: 420E74C8 30246EE7

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ext4 encrypted dir becomes sickish after 4-5 days Toralf Förster <toralf.foerster@gmx.de> - 2016-09-14 11:50 +0200
  Re: ext4 encrypted dir becomes sickish after 4-5 days Theodore Ts'o <tytso@mit.edu> - 2016-09-14 15:00 +0200
    Re: ext4 encrypted dir becomes sickish after 4-5 days Toralf Förster <toralf.foerster@gmx.de> - 2016-09-14 19:30 +0200

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