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note about getrandom with syscall whitelists

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Daniel Micay 2019-06-01 04:06:43 -04:00
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@ -666,6 +666,12 @@ System calls used by all build configurations:
* `munmap`
* `write(STDERR_FILENO, buf, len)` (before aborting due to memory corruption)
The main distinction from a typical malloc implementation is the use of
getrandom. A common compatibility issue is that existing system call whitelists
often omit getrandom partly due to older code using the legacy `/dev/urandom`
interface along with the overall lack of security features in mainstream libc
implementations.
Additional system calls when `CONFIG_SEAL_METADATA=true` is set:
* `pkey_alloc`