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package/openssh: Set /var/empty permissions

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The openssh privilege separation feature, enabled by default,
requires that the path /var/empty exists and has certain permissions
(not writable by the sshd user). Note that nothing ever gets writting
in this directory, so it works fine on a readonly rootfs.

See README.privsep included as part of the openssh distribution.

Signed-off-by: Chris Lesiak <chris.lesiak@licor.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit f85665c585)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Chris Lesiak 2018-12-17 22:25:32 +00:00 committed by Peter Korsgaard
parent e715c9c3c5
commit e417490427
1 changed files with 4 additions and 0 deletions
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package/openssh/openssh.mk
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@ -22,6 +22,10 @@ define OPENSSH_USERS
sshd -1 sshd -1 * - - - SSH drop priv user
endef
define OPENSSH_PERMISSIONS
/var/empty d 755 root root - - - - -
endef
ifeq ($(BR2_TOOLCHAIN_SUPPORTS_PIE),)
OPENSSH_CONF_OPTS += --without-pie
endif