From: "Serge E. Hallyn" <serge@hallyn.com>
To: Adrian Reber <areber@redhat.com>
Cc: "Christian Brauner" <christian.brauner@ubuntu.com>,
"Eric Biederman" <ebiederm@xmission.com>,
"Pavel Emelyanov" <ovzxemul@gmail.com>,
"Oleg Nesterov" <oleg@redhat.com>,
"Dmitry Safonov" <0x7f454c46@gmail.com>,
"Andrei Vagin" <avagin@gmail.com>,
"Nicolas Viennot" <Nicolas.Viennot@twosigma.com>,
"Michał Cłapiński" <mclapinski@google.com>,
"Kamil Yurtsever" <kyurtsever@google.com>,
"Dirk Petersen" <dipeit@gmail.com>,
"Christine Flood" <chf@redhat.com>,
"Casey Schaufler" <casey@schaufler-ca.com>,
"Mike Rapoport" <rppt@linux.ibm.com>,
"Radostin Stoyanov" <rstoyanov1@gmail.com>,
"Cyrill Gorcunov" <gorcunov@openvz.org>,
"Serge Hallyn" <serge@hallyn.com>,
"Stephen Smalley" <stephen.smalley.work@gmail.com>,
"Sargun Dhillon" <sargun@sargun.me>,
"Arnd Bergmann" <arnd@arndb.de>,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org, selinux@vger.kernel.org,
"Eric Paris" <eparis@parisplace.org>,
"Jann Horn" <jannh@google.com>,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v6 6/7] prctl: exe link permission error changed from -EINVAL to -EPERM
Date: Sun, 19 Jul 2020 12:05:45 -0500 [thread overview]
Message-ID: <20200719170545.GB3936@mail.hallyn.com> (raw)
In-Reply-To: <20200719100418.2112740-7-areber@redhat.com>
On Sun, Jul 19, 2020 at 12:04:16PM +0200, Adrian Reber wrote:
> From: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
>
> This brings consistency with the rest of the prctl() syscall where
> -EPERM is returned when failing a capability check.
>
> Signed-off-by: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
> Signed-off-by: Adrian Reber <areber@redhat.com>
Ok, i see how EINVAL snuck its way in there through validate_prctl_map()s
evolution :)
Reviewed-by: Serge Hallyn <serge@hallyn.com>
> ---
> kernel/sys.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/sys.c b/kernel/sys.c
> index a3f4ef0bbda3..ca11af9d815d 100644
> --- a/kernel/sys.c
> +++ b/kernel/sys.c
> @@ -2015,7 +2015,7 @@ static int prctl_set_mm_map(int opt, const void __user *addr, unsigned long data
> * This may have implications in the tomoyo subsystem.
> */
> if (!checkpoint_restore_ns_capable(current_user_ns()))
> - return -EINVAL;
> + return -EPERM;
>
> error = prctl_set_mm_exe_file(mm, prctl_map.exe_fd);
> if (error)
> --
> 2.26.2
next prev parent reply other threads:[~2020-07-19 17:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-19 10:04 [PATCH v6 0/7] capabilities: Introduce CAP_CHECKPOINT_RESTORE Adrian Reber
2020-07-19 10:04 ` [PATCH v6 1/7] " Adrian Reber
2020-07-19 10:04 ` [PATCH v6 2/7] pid: use checkpoint_restore_ns_capable() for set_tid Adrian Reber
2020-07-19 10:04 ` [PATCH v6 3/7] pid_namespace: use checkpoint_restore_ns_capable() for ns_last_pid Adrian Reber
2020-07-19 10:04 ` [PATCH v6 4/7] proc: allow access in init userns for map_files with CAP_CHECKPOINT_RESTORE Adrian Reber
2020-07-19 16:50 ` Serge E. Hallyn
2020-07-19 10:04 ` [PATCH v6 5/7] prctl: Allow local CAP_CHECKPOINT_RESTORE to change /proc/self/exe Adrian Reber
2020-07-19 10:04 ` [PATCH v6 6/7] prctl: exe link permission error changed from -EINVAL to -EPERM Adrian Reber
2020-07-19 17:05 ` Serge E. Hallyn [this message]
2020-07-19 10:04 ` [PATCH v6 7/7] selftests: add clone3() CAP_CHECKPOINT_RESTORE test Adrian Reber
2020-07-19 18:17 ` [PATCH v6 0/7] capabilities: Introduce CAP_CHECKPOINT_RESTORE Christian Brauner
2020-07-20 11:54 ` Christian Brauner
2020-07-20 12:46 ` Adrian Reber
2020-07-20 12:58 ` Christian Brauner
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