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

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: remoteproc: qcom: q6v5: Fix potential null-ptr-deref in q6v5_wcss_init_mmio() 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.

References

• https://git.kernel.org/stable/c/098ebb9089c4eedea09333f912d105fa63377496
• https://git.kernel.org/stable/c/3afa88ae9911b65702a3aca9d92ea23fe496e56f
• https://git.kernel.org/stable/c/0903a87490a9ed456ac765a84dcc484c1ee42c32
• https://git.kernel.org/stable/c/f360e2b275efbb745ba0af8b47d9ef44221be586