[PATCH] powerpc/powernv: Make opal log only readable by root
Jordan Niethe
jniethe5 at gmail.com
Wed Feb 27 14:02:29 AEDT 2019
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.
Signed-off-by: Jordan Niethe <jniethe5 at gmail.com>
---
arch/powerpc/platforms/powernv/opal-msglog.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/opal-msglog.c b/arch/powerpc/platforms/powernv/opal-msglog.c
index acd3206dfae3..06628c71cef6 100644
--- a/arch/powerpc/platforms/powernv/opal-msglog.c
+++ b/arch/powerpc/platforms/powernv/opal-msglog.c
@@ -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
};
--
2.20.1
More information about the Linuxppc-dev
mailing list