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(parent: d39d5c1) | patch
Restrict /dev/mem and /dev/kmem when the kernel is locked down
authorMatthew Garrett <matthew.garrett@nebula.com>
Wed, 5 Apr 2017 16:40:30 +0000 (17:40 +0100)
committerBen Hutchings <ben@decadent.org.uk>
Tue, 19 Sep 2017 00:59:17 +0000 (01:59 +0100)
commitdce8315d90db81dc9ce29837ba3bd3b99081389f
tree537c89711af578cd8dbc2f3a721ce8144752f6b4tree | snapshot
parentd39d5c1ea7425db8f814f5b0bff5045db65c0d1acommit | diff
Restrict /dev/mem and /dev/kmem when the kernel is locked down

Allowing users to write to address space makes it possible for the kernel to
be subverted, avoiding module loading restrictions.  Prevent this when the
kernel has been locked down.

Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Gbp-Pq: Topic features/all/lockdown
Gbp-Pq: Name 0042-Restrict-dev-mem-and-dev-kmem-when-the-kernel-is-loc.patch
drivers/char/mem.c diff | blob | history
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