| Message ID | 20230821130343.29495-2-quic_hprem@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | wifi: ath12k: Ignore fragments from uninitialized peer | expand |
Harshitha Prem <quic_hprem@quicinc.com> wrote: > When max virtual ap interfaces are configured in all the bands with > ACS and hostapd restart is done every 60s, a crash is observed at > random times. > > In the above scenario, a fragmented packet is received for self peer, > for which rx_tid and rx_frags are not initialized in datapath. > While handling this fragment, crash is observed as the rx_frag list > is uninitialized and when we walk in ath12k_dp_rx_h_sort_frags, > skb null leads to exception. > > To address this, before processing received fragments we check > dp_setup_done flag is set to ensure that peer has completed its > dp peer setup for fragment queue, else ignore processing the > fragments. > > Call trace: > PC points to "ath12k_dp_process_rx_err+0x4e8/0xfcc [ath12k]" > LR points to "ath12k_dp_process_rx_err+0x480/0xfcc [ath12k]". > The Backtrace obtained is as follows: > ath12k_dp_process_rx_err+0x4e8/0xfcc [ath12k] > ath12k_dp_service_srng+0x78/0x260 [ath12k] > ath12k_pci_write32+0x990/0xb0c [ath12k] > __napi_poll+0x30/0xa4 > net_rx_action+0x118/0x270 > __do_softirq+0x10c/0x244 > irq_exit+0x64/0xb4 > __handle_domain_irq+0x88/0xac > gic_handle_irq+0x74/0xbc > el1_irq+0xf0/0x1c0 > arch_cpu_idle+0x10/0x18 > do_idle+0x104/0x248 > cpu_startup_entry+0x20/0x64 > rest_init+0xd0/0xdc > arch_call_rest_init+0xc/0x14 > > Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 > > Signed-off-by: Harshitha Prem <quic_hprem@quicinc.com> > Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> 2 patches applied to ath-next branch of ath.git, thanks. bbc86757ca62 wifi: ath12k: Ignore fragments from uninitialized peer in dp d48f55e773dc wifi: ath12k: fix undefined behavior with __fls in dp
diff --git a/drivers/net/wireless/ath/ath12k/dp.c b/drivers/net/wireless/ath/ath12k/dp.c index ae1645d0f42a..d825e08d820a 100644 --- a/drivers/net/wireless/ath/ath12k/dp.c +++ b/drivers/net/wireless/ath/ath12k/dp.c @@ -38,6 +38,7 @@ void ath12k_dp_peer_cleanup(struct ath12k *ar, int vdev_id, const u8 *addr) ath12k_dp_rx_peer_tid_cleanup(ar, peer); crypto_free_shash(peer->tfm_mmic); + peer->dp_setup_done = false; spin_unlock_bh(&ab->base_lock); } diff --git a/drivers/net/wireless/ath/ath12k/dp_rx.c b/drivers/net/wireless/ath/ath12k/dp_rx.c index 67f8c140840f..5923c7c9eaff 100644 --- a/drivers/net/wireless/ath/ath12k/dp_rx.c +++ b/drivers/net/wireless/ath/ath12k/dp_rx.c @@ -2748,6 +2748,7 @@ int ath12k_dp_rx_peer_frag_setup(struct ath12k *ar, const u8 *peer_mac, int vdev } peer->tfm_mmic = tfm; + peer->dp_setup_done = true; spin_unlock_bh(&ab->base_lock); return 0; @@ -3214,6 +3215,14 @@ static int ath12k_dp_rx_frag_h_mpdu(struct ath12k *ar, ret = -ENOENT; goto out_unlock; } + + if (!peer->dp_setup_done) { + ath12k_warn(ab, "The peer %pM [%d] has uninitialized datapath\n", + peer->addr, peer_id); + ret = -ENOENT; + goto out_unlock; + } + rx_tid = &peer->rx_tid[tid]; if ((!skb_queue_empty(&rx_tid->rx_frags) && seqno != rx_tid->cur_sn) || diff --git a/drivers/net/wireless/ath/ath12k/peer.h b/drivers/net/wireless/ath/ath12k/peer.h index b296dc0e2f67..c6edb24cbedd 100644 --- a/drivers/net/wireless/ath/ath12k/peer.h +++ b/drivers/net/wireless/ath/ath12k/peer.h @@ -44,6 +44,9 @@ struct ath12k_peer { struct ppdu_user_delayba ppdu_stats_delayba; bool delayba_flag; bool is_authorized; + + /* protected by ab->data_lock */ + bool dp_setup_done; }; void ath12k_peer_unmap_event(struct ath12k_base *ab, u16 peer_id);
When max virtual ap interfaces are configured in all the bands with ACS and hostapd restart is done every 60s, a crash is observed at random times. In the above scenario, a fragmented packet is received for self peer, for which rx_tid and rx_frags are not initialized in datapath. While handling this fragment, crash is observed as the rx_frag list is uninitialized and when we walk in ath12k_dp_rx_h_sort_frags, skb null leads to exception. To address this, before processing received fragments we check dp_setup_done flag is set to ensure that peer has completed its dp peer setup for fragment queue, else ignore processing the fragments. Call trace: PC points to "ath12k_dp_process_rx_err+0x4e8/0xfcc [ath12k]" LR points to "ath12k_dp_process_rx_err+0x480/0xfcc [ath12k]". The Backtrace obtained is as follows: ath12k_dp_process_rx_err+0x4e8/0xfcc [ath12k] ath12k_dp_service_srng+0x78/0x260 [ath12k] ath12k_pci_write32+0x990/0xb0c [ath12k] __napi_poll+0x30/0xa4 net_rx_action+0x118/0x270 __do_softirq+0x10c/0x244 irq_exit+0x64/0xb4 __handle_domain_irq+0x88/0xac gic_handle_irq+0x74/0xbc el1_irq+0xf0/0x1c0 arch_cpu_idle+0x10/0x18 do_idle+0x104/0x248 cpu_startup_entry+0x20/0x64 rest_init+0xd0/0xdc arch_call_rest_init+0xc/0x14 Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1 Signed-off-by: Harshitha Prem <quic_hprem@quicinc.com> --- drivers/net/wireless/ath/ath12k/dp.c | 1 + drivers/net/wireless/ath/ath12k/dp_rx.c | 9 +++++++++ drivers/net/wireless/ath/ath12k/peer.h | 3 +++ 3 files changed, 13 insertions(+)