diff options
| author | Ben Greear <greearb@candelatech.com> | 2016-06-30 15:23:53 +0300 |
|---|---|---|
| committer | Govind Singh <govinds@codeaurora.org> | 2017-01-06 15:59:01 +0530 |
| commit | 8dc00085e4707f64e6f3d290b3efbc7a1a8ed35b (patch) | |
| tree | 1e06fbb159aa9e97312282108f9784b7bb462116 /drivers/net | |
| parent | bc9f2c8a5396a516169e74117861518c18588913 (diff) | |
ath10k: ensure peer_map references are cleaned up
While debugging OS crashes due to firmware crashes, I enabled
kasan, and it noticed that peer objects were being used-after-freed.
Looks like there are two places we could be leaving stale references
in the peer-map, so clean that up.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/mac.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 6e5444a461ed..d5de250ff232 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -802,6 +802,7 @@ static void ath10k_peer_cleanup(struct ath10k *ar, u32 vdev_id) { struct ath10k_peer *peer, *tmp; int peer_id; + int i; lockdep_assert_held(&ar->conf_mutex); @@ -818,6 +819,17 @@ static void ath10k_peer_cleanup(struct ath10k *ar, u32 vdev_id) ar->peer_map[peer_id] = NULL; } + /* Double check that peer is properly un-referenced from + * the peer_map + */ + for (i = 0; i < ARRAY_SIZE(ar->peer_map); i++) { + if (ar->peer_map[i] == peer) { + ath10k_warn(ar, "removing stale peer_map entry for %pM (ptr %p idx %d)\n", + peer->addr, peer, i); + ar->peer_map[i] = NULL; + } + } + list_del(&peer->list); kfree(peer); ar->num_peers--; @@ -828,6 +840,7 @@ static void ath10k_peer_cleanup(struct ath10k *ar, u32 vdev_id) static void ath10k_peer_cleanup_all(struct ath10k *ar) { struct ath10k_peer *peer, *tmp; + int i; lockdep_assert_held(&ar->conf_mutex); @@ -836,6 +849,10 @@ static void ath10k_peer_cleanup_all(struct ath10k *ar) list_del(&peer->list); kfree(peer); } + + for (i = 0; i < ARRAY_SIZE(ar->peer_map); i++) + ar->peer_map[i] = NULL; + spin_unlock_bh(&ar->data_lock); ar->num_peers = 0; |