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authorJordan Niethe <jniethe5@gmail.com>2019-02-27 14:02:29 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2019-02-27 22:11:31 +1100
commit7b62f9bd2246b7d3d086e571397c14ba52645ef1 (patch)
tree2e00889207fb00faf9e512be2be696e730f626b5 /arch/powerpc/platforms
parente7140639b1de65bba435a6bd772d134901141f86 (diff)
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: bfc36894a48b ("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>
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r--arch/powerpc/platforms/powernv/opal-msglog.c2
1 files changed, 1 insertions, 1 deletions
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
};