ath10k: Protect against buggy firmware.
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Message ID 1532969029-12926-1-git-send-email-greearb@candelatech.com
State New
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Series
  • ath10k: Protect against buggy firmware.
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Commit Message

Ben Greear July 30, 2018, 4:43 p.m. UTC
From: Ben Greear <greearb@candelatech.com>

While testing some buggy wave-2 firmware, I was seeing full
kernel crashes.  Adding this additional check keeps
the kernel from crashing.

Signed-off-by: Ben Greear <greearb@candelatech.com>
---
 drivers/net/wireless/ath/ath10k/htt_rx.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Patch
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diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 478cc67..8ab949d 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -2644,9 +2644,9 @@  static void ath10k_htt_fetch_peer_stats(struct ath10k *ar,
 	rcu_read_lock();
 	spin_lock_bh(&ar->data_lock);
 	peer = ath10k_peer_find_by_id(ar, peer_id);
-	if (!peer) {
-		ath10k_warn(ar, "Invalid peer id %d peer stats buffer\n",
-			    peer_id);
+	if (!peer || !peer->sta) {
+		ath10k_warn(ar, "Invalid peer id %d or peer stats buffer, peer: %p  sta: %p\n",
+			    peer_id, peer, peer ? peer->sta : NULL);
 		goto out;
 	}