From cb5172d96d16df72db8b55146b0ec00bfd97f079 Mon Sep 17 00:00:00 2001
From: Amol Grover <frextrite@gmail.com>
Date: Mon, 2 Dec 2019 00:03:48 +0530
Subject: [PATCH] audit: Add __rcu annotation to RCU pointer
Add __rcu annotation to RCU-protected global pointer auditd_conn.
auditd_conn is an RCU-protected global pointer,i.e., accessed
via RCU methods rcu_dereference() and rcu_assign_pointer(),
hence it must be annotated with __rcu for sparse to report
warnings/errors correctly.
Fix multiple instances of the sparse error:
error: incompatible types in comparison expression
(different address spaces)
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Amol Grover <frextrite@gmail.com>
[PM: tweak subject line]
Signed-off-by: Paul Moore <paul@paul-moore.com>
---
kernel/audit.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/audit.c b/kernel/audit.c
index 8e09f0f55b4b..17b0d523afb3 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -102,12 +102,13 @@ struct audit_net {
* This struct is RCU protected; you must either hold the RCU lock for reading
* or the associated spinlock for writing.
*/
-static struct auditd_connection {
+struct auditd_connection {
struct pid *pid;
u32 portid;
struct net *net;
struct rcu_head rcu;
-} *auditd_conn = NULL;
+};
+static struct auditd_connection __rcu *auditd_conn;
static DEFINE_SPINLOCK(auditd_conn_lock);
/* If audit_rate_limit is non-zero, limit the rate of sending audit records
--
GitLab