From: Li Xu Date: Tue, 1 Oct 2019 13:09:11 +0000 (+0100) Subject: ASoC: wm_adsp: Fix theoretical NULL pointer for alg_region X-Git-Tag: v5.15~5160^2~21^2~20 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9daf4fd0302b2559223cf90dae7dc510c6679047;p=platform%2Fkernel%2Flinux-starfive.git ASoC: wm_adsp: Fix theoretical NULL pointer for alg_region Fix potential NULL pointer dereference for alg_region in wm_adsp_buffer_parse_legacy. In practice this can never happen as loading the firmware should have failed at the wm_adsp2_setup_algs stage, however probably better for the code to be robust against future changes and this is more helpful for static analysis. Signed-off-by: Li Xu Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20191001130911.19238-1-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown --- diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index ae28d99..85396d9 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -3697,11 +3697,16 @@ static int wm_adsp_buffer_parse_legacy(struct wm_adsp *dsp) u32 xmalg, addr, magic; int i, ret; + alg_region = wm_adsp_find_alg_region(dsp, WMFW_ADSP2_XM, dsp->fw_id); + if (!alg_region) { + adsp_err(dsp, "No algorithm region found\n"); + return -EINVAL; + } + buf = wm_adsp_buffer_alloc(dsp); if (!buf) return -ENOMEM; - alg_region = wm_adsp_find_alg_region(dsp, WMFW_ADSP2_XM, dsp->fw_id); xmalg = dsp->ops->sys_config_size / sizeof(__be32); addr = alg_region->base + xmalg + ALG_XM_FIELD(magic);