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Commit 0aa7fabb authored by Bob Copeland's avatar Bob Copeland Committed by Johannes Berg
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mac80211: mesh: handle failed alloc for rmc cache 



In the unlikely case that mesh_rmc_init() fails with -ENOMEM,
the rmc pointer will be left as NULL but the interface is still
operational because ieee80211_mesh_init_sdata() is not allowed
to fail.

If this happens, we would blindly dereference rmc when checking
whether a multicast frame is in the cache.  Instead just drop the
frames in the forwarding path.

Signed-off-by: default avatarBob Copeland <me@bobcopeland.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 74932959

net/mac80211/mesh.c

+3 −0
Original line number Diff line number Diff line
@@ -220,6 +220,9 @@ int mesh_rmc_check(struct ieee80211_sub_if_data *sdata, 
	u8 idx;

	struct rmc_entry *p, *n;



	if (!rmc)

		return -1;



	/* Don't care about endianness since only match matters */

	memcpy(&seqnum, &mesh_hdr->seqnum, sizeof(mesh_hdr->seqnum));

	idx = le32_to_cpu(mesh_hdr->seqnum) & rmc->idx_mask;