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(parent: 003f0a3) | 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)
committerYves-Alexis Perez <corsac@debian.org>
Wed, 21 Feb 2018 15:29:03 +0000 (15:29 +0000)
commit20e2cfc905ecff2c44f350c5238f02db07e1dec8
tree11c37afea8a78c3730494793e7826f3d57105fd0tree | snapshot
parent003f0a3a9c5d488e9b734bdf27dfdd20ed95ddb4commit | 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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