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console: Expand dummy functions for CFI

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This expands the no-op dummy functions into full prototypes to avoid
indirect call mismatches when running under Control Flow Integrity
checking, like with Clang's -fsanitize=cfi.

Co-Developed-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kees Cook
2018-02-26 16:04:20 -08:00
committed by Greg Kroah-Hartman
parent 209f668cd2
commit c396a5bf45
5 changed files with 121 additions and 48 deletions
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10
drivers/video/console/newport_con.c
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@@ -673,14 +673,14 @@ static bool newport_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
return true;
}
static int newport_dummy(struct vc_data *c)
static int newport_set_origin(struct vc_data *vc)
{
return 0;
}
#define DUMMY (void *) newport_dummy
static void newport_save_screen(struct vc_data *vc) { }
const struct consw newport_con = {
static const struct consw newport_con = {
.owner = THIS_MODULE,
.con_startup = newport_startup,
.con_init = newport_init,
@@ -694,8 +694,8 @@ const struct consw newport_con = {
.con_blank = newport_blank,
.con_font_set = newport_font_set,
.con_font_default = newport_font_default,
.con_set_origin = DUMMY,
.con_save_screen = DUMMY
.con_set_origin = newport_set_origin,
.con_save_screen = newport_save_screen
};
static int newport_probe(struct gio_device *dev,