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| author | Kees Cook <keescook@chromium.org> | 2018-02-26 16:04:20 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-27 10:17:33 +0100 |
| commit | c396a5bf457fb60159dcedbd4f48d53a62be030a (patch) | |
| tree | 7204e7a8f557baf359c0788796658997614d8a58 /drivers/usb/misc/sisusbvga/sisusb_con.c | |
| parent | 209f668cd29d2b6b9f39a0b9f179ee40f47c2014 (diff) | |
| download | linux-c396a5bf457fb60159dcedbd4f48d53a62be030a.tar.gz linux-c396a5bf457fb60159dcedbd4f48d53a62be030a.tar.bz2 linux-c396a5bf457fb60159dcedbd4f48d53a62be030a.zip | |
console: Expand dummy functions for CFI
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>
Diffstat (limited to 'drivers/usb/misc/sisusbvga/sisusb_con.c')
| -rw-r--r-- | drivers/usb/misc/sisusbvga/sisusb_con.c | 67 |
1 files changed, 52 insertions, 15 deletions
diff --git a/drivers/usb/misc/sisusbvga/sisusb_con.c b/drivers/usb/misc/sisusbvga/sisusb_con.c index 998df891bdde..a0d6e0af957c 100644 --- a/drivers/usb/misc/sisusbvga/sisusb_con.c +++ b/drivers/usb/misc/sisusbvga/sisusb_con.c @@ -1217,7 +1217,7 @@ font_op_error: /* Interface routine */ static int sisusbcon_font_set(struct vc_data *c, struct console_font *font, - unsigned flags) + unsigned int flags) { struct sisusb_usb_data *sisusb; unsigned charcount = font->charcount; @@ -1338,28 +1338,65 @@ static void sisusbdummycon_init(struct vc_data *vc, int init) vc_resize(vc, 80, 25); } -static int sisusbdummycon_dummy(void) +static void sisusbdummycon_deinit(struct vc_data *vc) { } +static void sisusbdummycon_clear(struct vc_data *vc, int sy, int sx, + int height, int width) { } +static void sisusbdummycon_putc(struct vc_data *vc, int c, int ypos, + int xpos) { } +static void sisusbdummycon_putcs(struct vc_data *vc, const unsigned short *s, + int count, int ypos, int xpos) { } +static void sisusbdummycon_cursor(struct vc_data *vc, int mode) { } + +static bool sisusbdummycon_scroll(struct vc_data *vc, unsigned int top, + unsigned int bottom, enum con_scroll dir, + unsigned int lines) { - return 0; + return false; } -#define SISUSBCONDUMMY (void *)sisusbdummycon_dummy +static int sisusbdummycon_switch(struct vc_data *vc) +{ + return 0; +} + +static int sisusbdummycon_blank(struct vc_data *vc, int blank, int mode_switch) +{ + return 0; +} + +static int sisusbdummycon_font_set(struct vc_data *vc, + struct console_font *font, + unsigned int flags) +{ + return 0; +} + +static int sisusbdummycon_font_default(struct vc_data *vc, + struct console_font *font, char *name) +{ + return 0; +} + +static int sisusbdummycon_font_copy(struct vc_data *vc, int con) +{ + return 0; +} static const struct consw sisusb_dummy_con = { .owner = THIS_MODULE, .con_startup = sisusbdummycon_startup, .con_init = sisusbdummycon_init, - .con_deinit = SISUSBCONDUMMY, - .con_clear = SISUSBCONDUMMY, - .con_putc = SISUSBCONDUMMY, - .con_putcs = SISUSBCONDUMMY, - .con_cursor = SISUSBCONDUMMY, - .con_scroll = SISUSBCONDUMMY, - .con_switch = SISUSBCONDUMMY, - .con_blank = SISUSBCONDUMMY, - .con_font_set = SISUSBCONDUMMY, - .con_font_default = SISUSBCONDUMMY, - .con_font_copy = SISUSBCONDUMMY, + .con_deinit = sisusbdummycon_deinit, + .con_clear = sisusbdummycon_clear, + .con_putc = sisusbdummycon_putc, + .con_putcs = sisusbdummycon_putcs, + .con_cursor = sisusbdummycon_cursor, + .con_scroll = sisusbdummycon_scroll, + .con_switch = sisusbdummycon_switch, + .con_blank = sisusbdummycon_blank, + .con_font_set = sisusbdummycon_font_set, + .con_font_default = sisusbdummycon_font_default, + .con_font_copy = sisusbdummycon_font_copy, }; int |