Commit 7b62f9bd authored Feb 27, 2019 by Jordan Niethe Committed by Michael Ellerman Feb 27, 2019

powerpc/powernv: Make opal log only readable by root



Currently the opal log is globally readable. It is kernel policy to
limit the visibility of physical addresses / kernel pointers to root.
Given this and the fact the opal log may contain this information it
would be better to limit the readability to root.

Fixes: bfc36894 ("powerpc/powernv: Add OPAL message log interface")
Cc: stable@vger.kernel.org # v3.15+
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Stewart Smith <stewart@linux.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent e7140639

arch/powerpc/platforms/powernv/opal-msglog.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -98,7 +98,7 @@ static ssize_t opal_msglog_read(struct file file, struct kobject kobj,
		}

		static struct bin_attribute opal_msglog_attr = {
		.attr = {.name = "msglog", .mode = 0444},
		.attr = {.name = "msglog", .mode = 0400},
		.read = opal_msglog_read
		};

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