Jelle Raaijmakers 54f5b1346c Kernel: Support null act argument for sigaction syscall ...

Userspace can provide a null argument for the `act` argument to the
`sigaction` syscall to not set any new behavior. This is described
here:

https://pubs.opengroup.org/onlinepubs/007904875/functions/sigaction.html

Without this fix, the `copy_from_user(...)` invocation on `user_act`
fails and makes the syscall return early.

2021-04-24 23:00:28 +02:00

3.3 KiB

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