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Diffstat (limited to 'kernel/seccomp.c')
-rw-r--r--kernel/seccomp.c60
1 files changed, 38 insertions, 22 deletions
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index dc77548167ef..f4afe6790e4c 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -1199,48 +1199,64 @@ static bool seccomp_actions_logged_from_names(u32 *actions_logged, char *names)
return true;
}
-static int seccomp_actions_logged_handler(struct ctl_table *ro_table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
+static int read_actions_logged(struct ctl_table *ro_table, void __user *buffer,
+ size_t *lenp, loff_t *ppos)
{
char names[sizeof(seccomp_actions_avail)];
struct ctl_table table;
+
+ memset(names, 0, sizeof(names));
+
+ if (!seccomp_names_from_actions_logged(names, sizeof(names),
+ seccomp_actions_logged))
+ return -EINVAL;
+
+ table = *ro_table;
+ table.data = names;
+ table.maxlen = sizeof(names);
+ return proc_dostring(&table, 0, buffer, lenp, ppos);
+}
+
+static int write_actions_logged(struct ctl_table *ro_table, void __user *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ char names[sizeof(seccomp_actions_avail)];
+ struct ctl_table table;
+ u32 actions_logged;
int ret;
- if (write && !capable(CAP_SYS_ADMIN))
+ if (!capable(CAP_SYS_ADMIN))
return -EPERM;
memset(names, 0, sizeof(names));
- if (!write) {
- if (!seccomp_names_from_actions_logged(names, sizeof(names),
- seccomp_actions_logged))
- return -EINVAL;
- }
-
table = *ro_table;
table.data = names;
table.maxlen = sizeof(names);
- ret = proc_dostring(&table, write, buffer, lenp, ppos);
+ ret = proc_dostring(&table, 1, buffer, lenp, ppos);
if (ret)
return ret;
- if (write) {
- u32 actions_logged;
-
- if (!seccomp_actions_logged_from_names(&actions_logged,
- table.data))
- return -EINVAL;
-
- if (actions_logged & SECCOMP_LOG_ALLOW)
- return -EINVAL;
+ if (!seccomp_actions_logged_from_names(&actions_logged, table.data))
+ return -EINVAL;
- seccomp_actions_logged = actions_logged;
- }
+ if (actions_logged & SECCOMP_LOG_ALLOW)
+ return -EINVAL;
+ seccomp_actions_logged = actions_logged;
return 0;
}
+static int seccomp_actions_logged_handler(struct ctl_table *ro_table, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos)
+{
+ if (write)
+ return write_actions_logged(ro_table, buffer, lenp, ppos);
+ else
+ return read_actions_logged(ro_table, buffer, lenp, ppos);
+}
+
static struct ctl_path seccomp_sysctl_path[] = {
{ .procname = "kernel", },
{ .procname = "seccomp", },