diff options
Diffstat (limited to 'lib-vsprintf-default-kptr_restrict-to-the-maximum-value.patch')
| -rw-r--r-- | lib-vsprintf-default-kptr_restrict-to-the-maximum-value.patch | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib-vsprintf-default-kptr_restrict-to-the-maximum-value.patch b/lib-vsprintf-default-kptr_restrict-to-the-maximum-value.patch new file mode 100644 index 00000000000000..e247b29c635926 --- /dev/null +++ b/lib-vsprintf-default-kptr_restrict-to-the-maximum-value.patch @@ -0,0 +1,26 @@ +From: Dave Weinstein <olorin@google.com> +Date: Wed, 11 Jan 2017 16:27:59 -0800 +Subject: lib: vsprintf: default kptr_restrict to the maximum value + +Set the initial value of kptr_restrict to the maximum +setting rather than the minimum setting, to ensure that +early boot logging is not leaking information. + +Signed-off-by: Dave Weinstein <olorin@google.com> +--- + +--- + lib/vsprintf.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/lib/vsprintf.c ++++ b/lib/vsprintf.c +@@ -395,7 +395,7 @@ struct printf_spec { + #define FIELD_WIDTH_MAX ((1 << 23) - 1) + #define PRECISION_MAX ((1 << 15) - 1) + +-int kptr_restrict __read_mostly; ++int kptr_restrict __read_mostly = 4; + + /* + * Always cleanse %p and %pK specifiers |