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(parent: a0c0def) | patch
Restrict /dev/mem and /dev/kmem when securelevel is set.
authorMatthew Garrett <mjg59@srcf.ucam.org>
Fri, 9 Mar 2012 14:28:15 +0000 (09:28 -0500)
committerBen Hutchings <ben@decadent.org.uk>
Tue, 19 Sep 2017 01:34:05 +0000 (02:34 +0100)
commit8075e665d691e459ce83e6d364f694336b46ce14
treeb3caa454437d51d15b32437077365f1d40f0a3d2tree | snapshot
parenta0c0def0e36e4b1e0869f195c53923d71dce763dcommit | diff
Restrict /dev/mem and /dev/kmem when securelevel is set.

Allowing users to write to address space provides mechanisms that may permit
modification of the kernel at runtime. Prevent this if securelevel has been
set.

Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>
[bwh: Forward-ported to 4.9: adjust context]

Gbp-Pq: Topic features/all/securelevel
Gbp-Pq: Name restrict-dev-mem-and-dev-kmem-when-securelevel-is-se.patch
drivers/char/mem.c diff | blob | history
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