thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: thermal/int340x_thermal: handle data_vault when the value is ZERO_SIZE_PTR In some case, the GDDV returns a package with a buffer which has zero length. It causes that kmemdup() returns ZERO_SIZE_PTR (0x10). Then the data_vault_read() got NULL point dereference problem when accessing the 0x10 value in data_vault. [ 71.024560] BUG: kernel NULL pointer dereference, address: 0000000000000010 This patch uses ZERO_OR_NULL_PTR() for checking ZERO_SIZE_PTR or NULL value in data_vault.

References

• https://git.kernel.org/stable/c/722588f17fd3d3a127e50718ec2caf22bd7e9daa
• https://git.kernel.org/stable/c/39d5137085a6c37ace4680ee4d24020a4a03e7dc
• https://git.kernel.org/stable/c/dae42083b045a4ddf71c57cf350cb2412b5915c2
• https://git.kernel.org/stable/c/7931e28098a4c1a2a6802510b0cbe57546d2049d