Use -1 as the mmap file descriptor with MAP_ANONYMOUS

trailofbits / cb-multios

DARPA Challenges Sets for Linux, Windows, and macOS

https://blog.trailofbits.com/2016/08/01/your-tool-works-better-than-mine-prove-it/

MIT License

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Use -1 as the mmap file descriptor with MAP_ANONYMOUS #69

Closed smcc closed 4 years ago

smcc commented 4 years ago

Linux simply ignores the fd argument with MAP_ANONYMOUS, but some other systems (I checked the FreeBSD man page) require that the placeholder value be -1. Logically this makes sense because -1 is never a valid file descriptor, whereas 0 is the file descriptor for standard input.

claassistantio commented 4 years ago

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