From ec7bf231aaa1bdbcb69d23bc50c753c80fb22429 Mon Sep 17 00:00:00 2001 From: Zeng Heng Date: Mon, 14 Nov 2022 16:56:29 +0800 Subject: ASoC: pxa: fix null-pointer dereference in filter() kasprintf() would return NULL pointer when kmalloc() fail to allocate. Need to check the return pointer before calling strcmp(). Fixes: 7a824e214e25 ("ASoC: mmp: add audio dma support") Signed-off-by: Zeng Heng Link: https://lore.kernel.org/r/20221114085629.1910435-1-zengheng4@huawei.com Signed-off-by: Mark Brown --- sound/soc/pxa/mmp-pcm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sound/soc/pxa/mmp-pcm.c') diff --git a/sound/soc/pxa/mmp-pcm.c b/sound/soc/pxa/mmp-pcm.c index 5d520e18e512..99b245e3079a 100644 --- a/sound/soc/pxa/mmp-pcm.c +++ b/sound/soc/pxa/mmp-pcm.c @@ -98,7 +98,7 @@ static bool filter(struct dma_chan *chan, void *param) devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name, dma_data->ssp_id); - if ((strcmp(dev_name(chan->device->dev), devname) == 0) && + if (devname && (strcmp(dev_name(chan->device->dev), devname) == 0) && (chan->chan_id == dma_data->dma_res->start)) { found = true; } -- cgit v1.2.3