Do some hardening in IPC::createMessageDecoder().
<rdar://75139294>
Created attachment 444307 [details] Patch
Comment on attachment 444307 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=444307&action=review > Source/WebKit/Platform/IPC/cocoa/ConnectionCocoa.mm:438 > + auto sizeWithPortDescriptors = CheckedSize { sizeof(mach_msg_header_t) } + sizeof(mach_msg_body_t) + numberOfPortDescriptors * sizeof(mach_msg_port_descriptor_t); Could add the first two sizes inside CheckedSize. Is the numberOfPortDescriptors multiplication safe without CheckedSize? Currently itβs converted to CheckedSize only after multiplying. > Source/WebKit/Platform/IPC/cocoa/ConnectionCocoa.mm:483 > + auto messageBodySize = CheckedSize { header->msgh_size } - sizeWithPortDescriptors; Not important to have the CheckedSize cast here.
Created attachment 444375 [details] Patch
Committed r285865 (244291@main): <https://commits.webkit.org/244291@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 444375 [details].