spi: mchp-pci1xxx: Fix a possible null pointer dereference in pci1xxx_spi_probe

Linux kernel 安全漏洞

spi: mchp-pci1xxx: 在pci1xxx_spi_probe中修复可能的空指针解除引用

In the Linux kernel, the following vulnerability has been resolved: spi: mchp-pci1xxx: Fix a possible null pointer dereference in pci1xxx_spi_probe In function pci1xxxx_spi_probe, there is a potential null pointer that may be caused by a failed memory allocation by the function devm_kzalloc. Hence, a null pointer check needs to be added to prevent null pointer dereferencing later in the code. To fix this issue, spi_bus->spi_int[iter] should be checked. The memory allocated by devm_kzalloc will be automatically released, so just directly return -ENOMEM without worrying about memory leaks.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于空指针取消引用。

在Linux内核中，已解决以下漏洞： spi: mchp-pci1xxx: 在pci1xxx_spi_probe函数中修复可能的空指针解除引用问题 在pci1xxxx_spi_probe函数中，可能存在一个潜在的空指针，这可能是由于函数devm_kzalloc失败分配内存所引起。因此，需要添加空指针检查以防止代码中稍后的空指针解除引用。 为了解决这个问题，应检查spi_bus->spi_int[iter]。由devm_kzalloc分配的内存将自动释放，因此可以直接返回-ENOMEM而无需担心内存泄漏。