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SubjectRe: [PATCH] wifi: ath11k: Fix memory leak in ath11k_peer_rx_frag_setup
On Thu, Dec 29, 2022 at 11:38:48AM +0400, Miaoqian Lin wrote:
> crypto_alloc_shash() allocates resources, which should be released by
> crypto_free_shash(). When ath11k_peer_find() fails, there has memory
> leak. Move crypto_alloc_shash() after ath11k_peer_find() to fix this.
>
> Fixes: 243874c64c81 ("ath11k: handle RX fragments")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
> ---
> drivers/net/wireless/ath/ath11k/dp_rx.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
> index c5a4c34d7749..1297caa2b09a 100644
> --- a/drivers/net/wireless/ath/ath11k/dp_rx.c
> +++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
> @@ -3116,10 +3116,6 @@ int ath11k_peer_rx_frag_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id
> struct dp_rx_tid *rx_tid;
> int i;
>
> - tfm = crypto_alloc_shash("michael_mic", 0, 0);
> - if (IS_ERR(tfm))
> - return PTR_ERR(tfm);
> -
> spin_lock_bh(&ab->base_lock);
>
> peer = ath11k_peer_find(ab, vdev_id, peer_mac);
> @@ -3129,6 +3125,10 @@ int ath11k_peer_rx_frag_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id
> return -ENOENT;
> }
>
> + tfm = crypto_alloc_shash("michael_mic", 0, 0);
> + if (IS_ERR(tfm))
> + return PTR_ERR(tfm);
> +

You forgot to unlock ab->base_lock.

Thanks

> for (i = 0; i <= IEEE80211_NUM_TIDS; i++) {
> rx_tid = &peer->rx_tid[i];
> rx_tid->ab = ab;
> --
> 2.25.1
>

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