From: Alexey Izbyshev <izbyshev@ispras.ru>
To: musl@lists.openwall.com
Subject: [musl] Why is setrlimit() considered to have per-thread effect?
Date: Thu, 15 Oct 2020 08:01:00 +0300 [thread overview]
Message-ID: <948f6fc6f3458f18152c0f8b505beec0@ispras.ru> (raw)
Hello,
Commit 544ee752cd[1] claims that setrlimit() is per-thread on Linux,
similarly to setxid() calls, so it should be called via __synccall().
But this appears to be wrong: the kernel code operates on
tsk->signal[2], which is a per-thread-group structure. Glibc doesn't
call setrlimit() for each thread either. Am I missing something?
Tangentially, setgroups() is not called via __synccall(), though it does
have per-thread effect. Is this intentional?
Alexey
[1]
https://git.musl-libc.org/cgit/musl/commit/?id=544ee752cd38febfa3aa3798b4dfb6fabd13846b
[2] https://elixir.bootlin.com/linux/v5.9/source/kernel/sys.c#L1566
next reply other threads:[~2020-10-15 5:01 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-15 5:01 Alexey Izbyshev [this message]
2020-10-15 8:50 ` Szabolcs Nagy
2020-10-15 15:49 ` Rich Felker
2020-10-15 16:13 ` Alexey Izbyshev
2020-10-15 17:13 ` Rich Felker
2020-10-15 18:26 ` Alexey Izbyshev
2020-10-15 20:03 ` Rich Felker
2020-10-15 15:50 ` Alexey Izbyshev
2020-10-15 20:05 ` Rich Felker
2020-10-15 15:43 ` Rich Felker
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