Bug 72957

Summary:	systemd hangs activating encrypted swap partition
Product:	systemd	Reporter:	Alexey Vladykin <vladykin>
Component:	general	Assignee:	systemd-bugs
Status:	RESOLVED WORKSFORME	QA Contact:	systemd-bugs
Severity:	normal
Priority:	medium	CC:	systemd
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Alexey Vladykin 2013-12-21 20:42:12 UTC

I have encrypted swap partition configured in /etc/crypttab:
> swap   /dev/sda2  /dev/urandom   swap,cipher=aes,hash=sha256,size=256

Based on this systemd generates two units:
- systemd-cryptsetup@swap.service (calls cryptsetup and mkswap)
- dev-mapper-swap.device (requires systemd-cryptsetup@swap.service).

Starting systemd-cryptsetup@swap.service succeeds, but
> systemctl start dev-mapper-swap.device
hangs indefinitely.
In the journal I see that systemd-cryptsetup@swap.service successfully executes all commands and is marked started. But dev-mapper-swap.device does not start and there is no clue what blocks it.

Another non-swap encrypted partition starts without any hangs or delays.

This happens on Gentoo Linux with systemd-208-r2.

Comment 1 Alexey Vladykin 2013-12-25 20:15:49 UTC

The problem has been tracked down to an incorrect kernel configuration:
CONFIG_UEVENT_HELPER_PATH pointed to non-existent /sbin/hotplug.
Changing this parameter value to an empty string and recompiling the kernel has fixed the hang, encrypted swap is mounted successfully.

More details at https://bugs.gentoo.org/show_bug.cgi?id=493874

I think this bug may be closed.

Comment 2 Lennart Poettering 2014-06-25 10:52:22 UTC

OK, closing then.

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