From: Rich Felker <dalias@libc.org>
To: Yuri Kanivetsky <yuri.kanivetsky@gmail.com>
Cc: musl@lists.openwall.com
Subject: Re: [musl] faccessat() always return EPERM
Date: Fri, 23 Jul 2021 21:40:22 -0400 [thread overview]
Message-ID: <20210724014021.GM13220@brightrain.aerifal.cx> (raw)
In-Reply-To: <CAMhVC3ZwQdPK76Nw2QCc787wD=CN4XixJ1J6YbidhPBt5T-v6g@mail.gmail.com>
On Sat, Jul 24, 2021 at 04:16:25AM +0300, Yuri Kanivetsky wrote:
> Hi,
>
> I'm not sure that it has something to do with musl. But experienced in
> a Alpine Linux docker container (ruby:2.6-alpine3.14) on Debian 9 or
> 10. I can't reproduce it with Alpine Linux 3.13 (container) or Debian
> 8 (host).
>
> For example, the following program outputs -1:
>
> #include <stdio.h>
> #include <fcntl.h>
> #include <unistd.h>
>
> int main()
> {
> int r;
> r = faccessat(AT_FDCWD, "/", R_OK, AT_EACCESS);
> printf("%i", r);
> return 0;
> }
>
> I believe whatever is passed as the second parameter, it would return -1.
>
> As a result at least irb and bundler doesn't work. Is this some sort
> of binary incompatibility with Linux kernel?
No, it's almost surely Docker blocking the operation with the wrong
error code (EPERM):
https://github.com/opencontainers/runc/issues/2151
I'm not sure what the status on getting fix deployed is. It might go
away if the host running Docker can upgrade.
Rich
next prev parent reply other threads:[~2021-07-24 1:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-24 1:16 Yuri Kanivetsky
2021-07-24 1:40 ` Rich Felker [this message]
2021-07-24 5:56 ` Rich Felker
2021-07-24 23:36 ` Alex Xu (Hello71)
2021-07-27 4:34 ` Yuri Kanivetsky
2021-07-24 1:56 ` Wolf
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