ASoC: core: Fix Null-point-dereference in fmt_single_name()

commit 41daf6ba594d55f201c50280ebcd430590441da1 upstream.

Check the return value of devm_kstrdup() in case of
Null-point-dereference.

Fixes: 45dd9943fce0 ("ASoC: core: remove artificial component and DAI name constraint")
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Link: https://lore.kernel.org/r/20210524024941.159952-1-wangkefeng.wang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index bf65cba232e677ea06d5197fd96ea4d25c226500..b22674e3a89c973c17b4980c18234ff748ae8db4 100644 (file)
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -2231,6 +2231,8 @@ static char *fmt_single_name(struct device *dev, int *id)
                return NULL;
 
        name = devm_kstrdup(dev, devname, GFP_KERNEL);
+       if (!name)
+               return NULL;
 
        /* are we a "%s.%d" name (platform and SPI components) */
        found = strstr(name, dev->driver->name);