[LTP] [PATCH v2 3/4] syscalls/prctl04: Allow rt_sigprocmask in the syscall filter

[Tudor Cretu]

Hi Petr,

On 23-08-2022 10:41, Petr Vorel wrote:
> Hi Tudor,
>
>> Some libcs (e.g. Musl) call rt_sigprocmask as part of their fork
>> implementation. To successfully call fork, rt_sigprocmask must be allowed
>> as well in the filter.
>
> When tested on lastest update Alpine with 1.2.3 it in both cases fails:
>
> prctl04.c:205: TPASS: SECCOMP_MODE_FILTER doesn't permit exit()
> prctl04.c:207: TFAIL: SECCOMP_MODE_FILTER doesn't permit exit()

Sorry, I am not sure I understand. Which are the both cases in which the
test fails? I am also using Musl 1.2.3 and the test passes for me on
BusyBox (both x86_64 and AArch64). I don't have an Alpine environment,
and I am having issues with docker and seccomp, so I am not able to test
on Alpine yet.

Kind regards,
Tudor

>
> What can be wrong?
>
> @Yang Xu: Also this test (written in new API) should use tst_reinit()
> https://lore.kernel.org/ltp/70476626-2c7a-fcd6-4cf4-de7cbd572f99@fujitsu.com/T/#mb3e34713dd15f2050ec2dc01615fefb7ee66c880
>
> Kind regards,
> Petr
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