From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Subject: Re: Re: Hangup calling setuid() from vfork() child
Date: Mon, 30 Sep 2019 22:27:28 +0200 [thread overview]
Message-ID: <20190930202727.GT22009@port70.net> (raw)
In-Reply-To: <CA+jjjYSomVyXPoRkioRj3yhS6xRZ+Ejv9xpm8_ALdJLuD3o=Nw@mail.gmail.com>
* Joshua Hudson <joshudson@gmail.com> [2019-09-30 12:57:34 -0700]:
> >It's simpler than that. The (retired) specification for vfork did not
> >allow anything but _exit or execve in the child after vfork, so the
> >issue doesn't arise and it works perfectly fine with threads as long
> >as you follow the requirement.
>
> I'm reading the man page for vfork and it says what it actually does, that
> is overlay the child process on the memory of the calling process.
the internals don't matter, the interface contract is
that you can only call exec* or _exit in the child.
>
> posix_spawn can't be used in the originating location, and fork() is
why?
> hogging too much memory.
next prev parent reply other threads:[~2019-09-30 20:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-30 19:57 Joshua Hudson
2019-09-30 20:24 ` Markus Wichmann
2019-09-30 20:27 ` Szabolcs Nagy [this message]
2019-09-30 20:45 Joshua Hudson
2019-09-30 22:47 ` Rich Felker
2019-10-01 5:54 ` Florian Weimer
2019-10-01 9:29 ` Szabolcs Nagy
2019-10-01 11:44 ` Rich Felker
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