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Subject[PATCH v2 2/4] seccomp: make get_nth_filter available outside of CHECKPOINT_RESTORE
Date
In the next commit we'll use this same mnemonic to get a listener for the
nth filter, so we need it available outside of CHECKPOINT_RESTORE. This is
slightly looser than necessary, because it really could be
CHECKPOINT_RESTORE || USER_NOTIFICATION, but it's declared static and this
complicates the code less, so hopefully it's ok.

Signed-off-by: Tycho Andersen <tycho@tycho.ws>
CC: Kees Cook <keescook@chromium.org>
CC: Andy Lutomirski <luto@amacapital.net>
CC: Oleg Nesterov <oleg@redhat.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
CC: "Serge E. Hallyn" <serge@hallyn.com>
CC: Christian Brauner <christian.brauner@ubuntu.com>
CC: Tyler Hicks <tyhicks@canonical.com>
CC: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

v2: new in v2
---
kernel/seccomp.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index a169a62cb78a..f136eca93f2f 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -1180,7 +1180,7 @@ long prctl_set_seccomp(unsigned long seccomp_mode, char __user *filter)
return do_seccomp(op, 0, uargs);
}

-#if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE)
+#if defined(CONFIG_SECCOMP_FILTER)
static struct seccomp_filter *get_nth_filter(struct task_struct *task,
unsigned long filter_off)
{
@@ -1227,6 +1227,7 @@ static struct seccomp_filter *get_nth_filter(struct task_struct *task,
return filter;
}

+#if defined(CONFIG_CHECKPOINT_RESTORE)
long seccomp_get_filter(struct task_struct *task, unsigned long filter_off,
void __user *data)
{
@@ -1299,7 +1300,8 @@ long seccomp_get_metadata(struct task_struct *task,
__put_seccomp_filter(filter);
return ret;
}
-#endif
+#endif /* CONFIG_CHECKPOINT_RESTORE */
+#endif /* CONFIG_SECCOMP_FILTER */

#ifdef CONFIG_SYSCTL

--
2.17.0
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