3.16.70-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Jordan Niethe <jniet...@gmail.com>
commit 7b62f9bd2246b7d3d086e571397c14ba52645ef1 upstream.
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: bfc36894a48b ("powerpc/powernv: Add OPAL message log interface")
Signed-off-by: Jordan Niethe <jniet...@gmail.com>
Reviewed-by: Stewart Smith <stew...@linux.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnel...@au1.ibm.com>
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
arch/powerpc/platforms/powernv/opal-msglog.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/powerpc/platforms/powernv/opal-msglog.c
+++ b/arch/powerpc/platforms/powernv/opal-msglog.c
@@ -92,7 +92,7 @@ out:
}
static struct bin_attribute opal_msglog_attr = {
- .attr = {.name = "msglog", .mode = 0444},
+ .attr = {.name = "msglog", .mode = 0400},
.read = opal_msglog_read
};
