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remoteproc: qcom: q6v5: Fix potential null-ptr-deref in q6v5_wcss_init_mmio()

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q6v5_wcss_init_mmio() will call platform_get_resource_byname() that may
fail and return NULL. devm_ioremap() will use res->start as input, which
may causes null-ptr-deref. Check the ret value of
platform_get_resource_byname() to avoid the null-ptr-deref.

Fixes: 0af65b9b91 ("remoteproc: qcom: wcss: Add non pas wcss Q6 support for QCS404")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221125021641.29392-1-shangxiaojing@huawei.com
This commit is contained in:
Shang XiaoJing 2022-11-25 10:16:41 +08:00 committed by Bjorn Andersson
parent e01ce676aa
commit f360e2b275
1 changed files with 3 additions and 0 deletions
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3
drivers/remoteproc/qcom_q6v5_wcss.c
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@ -827,6 +827,9 @@ static int q6v5_wcss_init_mmio(struct q6v5_wcss *wcss,
int ret;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6");
if (!res)
return -EINVAL;
wcss->reg_base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!wcss->reg_base)