kernel: udmabuf: validate ubuf->pagecount

A vulnerability was found in the Linux kernel in the udmabufcreate function. An improper user-provided argument validation can lead to a ZEROPTR value being passed to the sgallocappendtablefrompages function, which attempts a dereference and leads to a kernel crash...

kernel: udmabuf: validate ubuf->pagecount

A vulnerability was found in the Linux kernel in the udmabufcreate function. An improper user-provided argument validation can lead to a ZEROPTR value being passed to the sgallocappendtablefrompages function, which attempts a dereference and leads to a kernel crash...