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-rw-r--r--kernel/seccomp.c58
1 files changed, 49 insertions, 9 deletions
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index b36ac1e0cd0e..f5630d1a88fe 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -1219,11 +1219,10 @@ static int read_actions_logged(struct ctl_table *ro_table, void __user *buffer,
}
static int write_actions_logged(struct ctl_table *ro_table, void __user *buffer,
- size_t *lenp, loff_t *ppos)
+ size_t *lenp, loff_t *ppos, u32 *actions_logged)
{
char names[sizeof(seccomp_actions_avail)];
struct ctl_table table;
- u32 actions_logged;
int ret;
if (!capable(CAP_SYS_ADMIN))
@@ -1238,24 +1237,65 @@ static int write_actions_logged(struct ctl_table *ro_table, void __user *buffer,
if (ret)
return ret;
- if (!seccomp_actions_logged_from_names(&actions_logged, table.data))
+ if (!seccomp_actions_logged_from_names(actions_logged, table.data))
return -EINVAL;
- if (actions_logged & SECCOMP_LOG_ALLOW)
+ if (*actions_logged & SECCOMP_LOG_ALLOW)
return -EINVAL;
- seccomp_actions_logged = actions_logged;
+ seccomp_actions_logged = *actions_logged;
return 0;
}
+static void audit_actions_logged(u32 actions_logged, u32 old_actions_logged,
+ int ret)
+{
+ char names[sizeof(seccomp_actions_avail)];
+ char old_names[sizeof(seccomp_actions_avail)];
+ const char *new = names;
+ const char *old = old_names;
+
+ if (!audit_enabled)
+ return;
+
+ memset(names, 0, sizeof(names));
+ memset(old_names, 0, sizeof(old_names));
+
+ if (ret)
+ new = "?";
+ else if (!actions_logged)
+ new = "(none)";
+ else if (!seccomp_names_from_actions_logged(names, sizeof(names),
+ actions_logged, ","))
+ new = "?";
+
+ if (!old_actions_logged)
+ old = "(none)";
+ else if (!seccomp_names_from_actions_logged(old_names,
+ sizeof(old_names),
+ old_actions_logged, ","))
+ old = "?";
+
+ return audit_seccomp_actions_logged(new, old, !ret);
+}
+
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);
+ int ret;
+
+ if (write) {
+ u32 actions_logged = 0;
+ u32 old_actions_logged = seccomp_actions_logged;
+
+ ret = write_actions_logged(ro_table, buffer, lenp, ppos,
+ &actions_logged);
+ audit_actions_logged(actions_logged, old_actions_logged, ret);
+ } else
+ ret = read_actions_logged(ro_table, buffer, lenp, ppos);
+
+ return ret;
}
static struct ctl_path seccomp_sysctl_path[] = {