[PATCH RESEND] net: hsr: Pass lockdep expression to RCU lists
From: Amol Grover <hidden>
Date: 2020-02-19 10:01:37
Also in:
linux-kernel-mentees, lkml
Subsystem:
hsr network protocol, networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
node_db is traversed using list_for_each_entry_rcu outside an RCU read-side critical section but under the protection of hsr->list_lock. Hence, add corresponding lockdep expression to silence false-positive warnings, and harden RCU lists. Signed-off-by: Amol Grover <redacted> --- Resend: - Remove failed delivery recipients net/hsr/hsr_framereg.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c
index 27dc65d7de67..cc8fcfd3918d 100644
--- a/net/hsr/hsr_framereg.c
+++ b/net/hsr/hsr_framereg.c@@ -156,7 +156,8 @@ static struct hsr_node *hsr_add_node(struct hsr_priv *hsr, new_node->seq_out[i] = seq_out; spin_lock_bh(&hsr->list_lock); - list_for_each_entry_rcu(node, node_db, mac_list) { + list_for_each_entry_rcu(node, node_db, mac_list, + lockdep_is_held(&hsr->list_lock)) { if (ether_addr_equal(node->macaddress_A, addr)) goto out; if (ether_addr_equal(node->macaddress_B, addr))
--
2.24.1