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[BlueZ,2/4] mesh: Ignore SNB with invalid IV Index values

Message ID 20220929110344.26130-3-isak.westin@loytec.com (mailing list archive)
State Accepted
Commit 7d050890f01f32ebb394140cf3206ad5a5548d79
Headers show
Series Mesh: Fix IV update and KeyRefresh procedures | expand

Checks

Context Check Description
tedd_an/pre-ci_am success Success
tedd_an/checkpatch success Checkpatch PASS
tedd_an/gitlint success Gitlint PASS

Commit Message

Isak Westin Sept. 29, 2022, 11:03 a.m. UTC 
If we are in IV update in progress state, and receive a Secure Network
beacon with an IV index equal to last known IV index + 1, and IV update
flag set to 1, it should be ignored. See MshPRFv1.0.1 section 3.10.5.
---
 mesh/net.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/mesh/net.c b/mesh/net.c
index dc3d1fd80..c225fdb9a 100644
--- a/mesh/net.c
+++ b/mesh/net.c
@@ -2671,6 +2671,10 @@  static bool update_iv_ivu_state(struct mesh_net *net, uint32_t iv_index,
 		if (iv_index == net->iv_index)
 			return false;
 
+		/* Ignore beacon with invalid IV index value */
+		if (net->iv_update && iv_index == net->iv_index + 1)
+			return false;
+
 		if (!net->iv_update) {
 			l_debug("iv_upd_state = IV_UPD_UPDATING");
 			net->iv_upd_state = IV_UPD_UPDATING;