From 58127176589c22d9fb8d60b67ce2c9bbec3dca67 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Fri, 30 Jun 2023 19:03:51 +0100 Subject: [PATCH] qemu-keymap: properly check return from xkb_keymap_mod_get_index MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We can return XKB_MOD_INVALID for AltGr which rightly gets flagged by sanitisers as an overly wide shift attempt. Properly check the return type and leave the bitmap as zero in that case. Tested output before and after is unchanged with the gb and ara keymaps. Reviewed-by: Juan Quintela Signed-off-by: Alex Bennée Message-Id: <20230630180423.558337-7-alex.bennee@linaro.org> --- qemu-keymap.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/qemu-keymap.c b/qemu-keymap.c index 229866e004..8c80f7a4ed 100644 --- a/qemu-keymap.c +++ b/qemu-keymap.c @@ -140,6 +140,18 @@ static void usage(FILE *out) names.options ?: "-"); } +static xkb_mod_mask_t get_mod(struct xkb_keymap *map, const char *name) +{ + xkb_mod_index_t mod; + xkb_mod_mask_t mask = 0; + + mod = xkb_keymap_mod_get_index(map, name); + if (mod != XKB_MOD_INVALID) { + mask = (1 << mod); + } + return mask; +} + int main(int argc, char *argv[]) { struct xkb_context *ctx; @@ -215,14 +227,10 @@ int main(int argc, char *argv[]) mod, xkb_keymap_mod_get_name(map, mod)); } - mod = xkb_keymap_mod_get_index(map, "Shift"); - shift = (1 << mod); - mod = xkb_keymap_mod_get_index(map, "Control"); - ctrl = (1 << mod); - mod = xkb_keymap_mod_get_index(map, "AltGr"); - altgr = (1 << mod); - mod = xkb_keymap_mod_get_index(map, "NumLock"); - numlock = (1 << mod); + shift = get_mod(map, "Shift"); + ctrl = get_mod(map, "Control"); + altgr = get_mod(map, "AltGr"); + numlock = get_mod(map, "NumLock"); state = xkb_state_new(map); xkb_keymap_key_for_each(map, walk_map, state);