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(parent: 8c7580c) | 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)
committerSalvatore Bonaccorso <carnil@debian.org>
Sun, 15 Oct 2017 06:57:36 +0000 (07:57 +0100)
commitd44f53d53e204b23f41e98aa4cd14b985364f639
treebcfdbf8d651b6fcde9de81553bc3e08c5c0a0a8ctree | snapshot
parent8c7580cfcf3d0653a95120a3e3ceaa7c1f6786dacommit | 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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