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acpi: Limit access to custom_method if securelevel is set
authorMatthew Garrett <mjg59@srcf.ucam.org>
Fri, 9 Mar 2012 13:39:37 +0000 (08:39 -0500)
committerSalvatore Bonaccorso <carnil@debian.org>
Fri, 2 Dec 2016 05:35:22 +0000 (05:35 +0000)
commit1582b8032c2f078dddd11802c34767d0e582eacb
tree513c1801c50c9dcd0e883fc94faf2e0dbfc6bd65tree | snapshot
parentd7cbb8b1dcc534b8453d7726293a1283434ac17ccommit | diff
acpi: Limit access to custom_method if securelevel is set

custom_method effectively allows arbitrary access to system memory, making
it possible for an attacker to modify the kernel at runtime. Prevent this
if securelevel has been set.

Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>
Gbp-Pq: Topic features/all/securelevel
Gbp-Pq: Name acpi-limit-access-to-custom_method-if-securelevel-is.patch
drivers/acpi/custom_method.c diff | blob | history
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