From: Al Viro <viro@zeniv•linux.org.uk>
To: "Mickaël Salaün" <mic@digikod•net>
Cc: "Alexei Starovoitov" <alexei.starovoitov@gmail•com>,
"Mickaël Salaün" <mickael.salaun@ssi•gouv.fr>,
linux-kernel@vger•kernel.org,
"Alexei Starovoitov" <ast@kernel•org>,
"Andrew Morton" <akpm@linux-foundation•org>,
"Andy Lutomirski" <luto@amacapital•net>,
"Arnaldo Carvalho de Melo" <acme@kernel•org>,
"Casey Schaufler" <casey@schaufler-ca•com>,
"Daniel Borkmann" <daniel@iogearbox•net>,
"David Drysdale" <drysdale@google•com>,
"David S . Miller" <davem@davemloft•net>,
"Eric W . Biederman" <ebiederm@xmission•com>,
"James Morris" <jmorris@namei•org>, "Jann Horn" <jann@thejh•net>,
"John Johansen" <john.johansen@canonical•com>,
"Jonathan Corbet" <corbet@lwn•net>,
"Kees Cook" <keescook@chromium•org>,
"Michael Kerrisk" <mtk.manpages@gmail•com>,
"Paul Moore" <paul@paul-moore•com>,
"Sargun Dhillon" <sargun@sargun•me>,
"Serge E . Hallyn" <serge@hallyn•com>,
"Shuah Khan" <shuah@kernel•org>,
"Stephen Smalley" <sds@tycho•nsa.gov>,
"Tejun Heo" <tj@kernel•org>,
"Tetsuo Handa" <penguin-kernel@i-love•sakura.ne.jp>,
"Thomas Graf" <tgraf@suug•ch>, "Tycho Andersen" <tycho@tycho•ws>,
"Will Drewry" <wad@chromium•org>,
kernel-hardening@lists•openwall.com, linux-api@vger•kernel.org,
linux-fsdevel@vger•kernel.org,
linux-security-module@vger•kernel.org, netdev@vger•kernel.org
Subject: Re: [PATCH bpf-next v10 06/10] bpf,landlock: Add a new map type: inode
Date: Sun, 8 Sep 2019 23:19:54 +0100 [thread overview]
Message-ID: <20190908221954.GD1131@ZenIV.linux.org.uk> (raw)
In-Reply-To: <894922a2-1150-366c-3f08-c8b759da0742@digikod.net>
On Mon, Sep 09, 2019 at 12:09:57AM +0200, Mickaël Salaün wrote:
> >>> + rcu_read_lock();
> >>> + ptr = htab_map_lookup_elem(map, &inode);
> >>> + iput(inode);
Wait a sec. You are doing _what_ under rcu_read_lock()?
> >>> + if (IS_ERR(ptr)) {
> >>> + ret = PTR_ERR(ptr);
> >>> + } else if (!ptr) {
> >>> + ret = -ENOENT;
> >>> + } else {
> >>> + ret = 0;
> >>> + copy_map_value(map, value, ptr);
> >>> + }
> >>> + rcu_read_unlock();
next prev parent reply other threads:[~2019-09-08 22:20 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-21 21:31 [PATCH bpf-next v10 00/10] Landlock LSM: Toward unprivileged sandboxing Mickaël Salaün
2019-07-21 21:31 ` [PATCH bpf-next v10 01/10] fs,security: Add a new file access type: MAY_CHROOT Mickaël Salaün
2019-07-21 21:31 ` [PATCH bpf-next v10 02/10] bpf: Add expected_attach_triggers and a is_valid_triggers() verifier Mickaël Salaün
2019-07-21 21:31 ` [PATCH bpf-next v10 03/10] bpf,landlock: Define an eBPF program type for Landlock hooks Mickaël Salaün
2019-07-21 21:31 ` [PATCH bpf-next v10 04/10] seccomp,landlock: Enforce Landlock programs per process hierarchy Mickaël Salaün
2019-07-21 21:31 ` [PATCH bpf-next v10 05/10] landlock: Handle filesystem access control Mickaël Salaün
2019-07-21 21:31 ` [PATCH bpf-next v10 06/10] bpf,landlock: Add a new map type: inode Mickaël Salaün
2019-07-27 1:40 ` Alexei Starovoitov
2019-07-31 18:46 ` Mickaël Salaün
2019-07-31 18:58 ` Alexei Starovoitov
2019-07-31 19:11 ` Mickaël Salaün
2019-08-01 17:35 ` Alexei Starovoitov
2019-08-06 16:24 ` Mickaël Salaün
2019-09-08 22:09 ` Mickaël Salaün
2019-09-08 22:19 ` Al Viro [this message]
2019-07-21 21:31 ` [PATCH bpf-next v10 07/10] landlock: Add ptrace restrictions Mickaël Salaün
2019-07-21 21:31 ` [PATCH bpf-next v10 08/10] bpf: Add a Landlock sandbox example Mickaël Salaün
2019-07-21 21:31 ` [PATCH bpf-next v10 09/10] bpf,landlock: Add tests for Landlock Mickaël Salaün
2019-07-21 21:31 ` [PATCH bpf-next v10 10/10] landlock: Add user and kernel documentation " Mickaël Salaün
2019-07-31 1:53 ` Randy Dunlap
2019-08-01 17:03 ` Mickaël Salaün
2019-08-01 17:49 ` Randy Dunlap
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