Messages in this thread Patch in this message | | | Date | Fri, 5 May 2017 21:07:37 -0700 | From | Greg KH <> | Subject | [RFC 4/6] lib: vsprintf: default kptr_restrict to the maximum value |
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From: Dave Weinstein <olorin@google.com>
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.
Cc: William Roberts <william.c.roberts@intel.com> Cc: Chris Fries <cfries@google.com> Signed-off-by: Dave Weinstein <olorin@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- lib/vsprintf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 75a49795fcae..404d477d4bd2 100644 --- 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 -- 2.12.2
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