From 2983695ab49322ecf0068c30b0411bfd840ac52f Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Fri, 15 Sep 2023 13:09:11 -0600 Subject: [PATCH] ASoC: SOF: ipc4-topology: Use size_add() in call to struct_size() [ Upstream commit 3746284c233d5cf5f456400e61cd4a46a69c6e8c ] If, for any reason, the open-coded arithmetic causes a wraparound, the protection that `struct_size()` adds against potential integer overflows is defeated. Fix this by hardening call to `struct_size()` with `size_add()`. Fixes: f9efae954905 ("ASoC: SOF: ipc4-topology: Add support for base config extension") Signed-off-by: "Gustavo A. R. Silva" Reviewed-by: Kees Cook Link: https://lore.kernel.org/r/ZQSr15AYJpDpipg6@work Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/soc/sof/ipc4-topology.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/soc/sof/ipc4-topology.c b/sound/soc/sof/ipc4-topology.c index 7cb63e6..c9c1d2e 100644 --- a/sound/soc/sof/ipc4-topology.c +++ b/sound/soc/sof/ipc4-topology.c @@ -895,7 +895,8 @@ static int sof_ipc4_widget_setup_comp_process(struct snd_sof_widget *swidget) if (process->init_config == SOF_IPC4_MODULE_INIT_CONFIG_TYPE_BASE_CFG_WITH_EXT) { struct sof_ipc4_base_module_cfg_ext *base_cfg_ext; u32 ext_size = struct_size(base_cfg_ext, pin_formats, - swidget->num_input_pins + swidget->num_output_pins); + size_add(swidget->num_input_pins, + swidget->num_output_pins)); base_cfg_ext = kzalloc(ext_size, GFP_KERNEL); if (!base_cfg_ext) { -- 2.7.4