From 0e2c9aeb00289f279b8181fbd4c20765127d8943 Mon Sep 17 00:00:00 2001 From: Kefeng Wang Date: Mon, 24 May 2021 10:49:41 +0800 Subject: [PATCH] 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 Reported-by: Hulk Robot Signed-off-by: Kefeng Wang Link: https://lore.kernel.org/r/20210524024941.159952-1-wangkefeng.wang@huawei.com Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- sound/soc/soc-core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index bf65cba232e6..b22674e3a89c 100644 --- 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);