From: Sven Eckelmann Date: Fri, 18 Aug 2023 13:52:18 +0000 (+0200) Subject: batman-adv: Merge bugfixes from 2023.2 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=refs%2Fpull%2F1014%2Fhead;p=feed%2Frouting.git batman-adv: Merge bugfixes from 2023.2 * Broken sync while rescheduling delayed work * compat: Use native kstrtox.h for 5.10.185 * Do not get eth header before batadv_check_management_packet * Trigger events for auto adjusted MTU * Don't increase MTU when set by user * Fix TT global entry leak when client roamed back * Fix batadv_v_ogm_aggr_send memory leak Signed-off-by: Sven Eckelmann --- diff --git a/batman-adv/patches/0013-batman-adv-Broken-sync-while-rescheduling-delayed-wo.patch b/batman-adv/patches/0013-batman-adv-Broken-sync-while-rescheduling-delayed-wo.patch new file mode 100644 index 0000000..667470c --- /dev/null +++ b/batman-adv/patches/0013-batman-adv-Broken-sync-while-rescheduling-delayed-wo.patch @@ -0,0 +1,48 @@ +From: Vladislav Efanov +Date: Fri, 26 May 2023 19:16:32 +0300 +Subject: batman-adv: Broken sync while rescheduling delayed work + +Syzkaller got a lot of crashes like: +KASAN: use-after-free Write in *_timers* + +All of these crashes point to the same memory area: + +The buggy address belongs to the object at ffff88801f870000 + which belongs to the cache kmalloc-8k of size 8192 +The buggy address is located 5320 bytes inside of + 8192-byte region [ffff88801f870000, ffff88801f872000) + +This area belongs to : + batadv_priv->batadv_priv_dat->delayed_work->timer_list + +The reason for these issues is the lack of synchronization. Delayed +work (batadv_dat_purge) schedules new timer/work while the device +is being deleted. As the result new timer/delayed work is set after +cancel_delayed_work_sync() was called. So after the device is freed +the timer list contains pointer to already freed memory. + +Found by Linux Verification Center (linuxtesting.org) with syzkaller. + +Fixes: f6badf9eb582 ("batman-adv: Distributed ARP Table - implement local storage") +Signed-off-by: Vladislav Efanov +Signed-off-by: Sven Eckelmann +Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/177ba85fb2d4ca2ecd30ca16803560e80e916fac + +--- a/net/batman-adv/distributed-arp-table.c ++++ b/net/batman-adv/distributed-arp-table.c +@@ -101,7 +101,6 @@ static void batadv_dat_purge(struct work + */ + static void batadv_dat_start_timer(struct batadv_priv *bat_priv) + { +- INIT_DELAYED_WORK(&bat_priv->dat.work, batadv_dat_purge); + queue_delayed_work(batadv_event_workqueue, &bat_priv->dat.work, + msecs_to_jiffies(10000)); + } +@@ -819,6 +818,7 @@ int batadv_dat_init(struct batadv_priv * + if (!bat_priv->dat.hash) + return -ENOMEM; + ++ INIT_DELAYED_WORK(&bat_priv->dat.work, batadv_dat_purge); + batadv_dat_start_timer(bat_priv); + + batadv_tvlv_handler_register(bat_priv, batadv_dat_tvlv_ogm_handler_v1, diff --git a/batman-adv/patches/0014-batman-adv-compat-Use-native-kstrtox.h-for-5.10.185.patch b/batman-adv/patches/0014-batman-adv-compat-Use-native-kstrtox.h-for-5.10.185.patch new file mode 100644 index 0000000..c916ed6 --- /dev/null +++ b/batman-adv/patches/0014-batman-adv-compat-Use-native-kstrtox.h-for-5.10.185.patch @@ -0,0 +1,29 @@ +From: Sven Eckelmann +Date: Tue, 11 Jul 2023 11:46:30 +0200 +Subject: batman-adv: compat: Use native kstrtox.h for 5.10.185 + +Upstream stable commit 6e2e551e39fd ("kernel.h: split out kstrtox() and +simple_strtox() to a separate header") backported the support for +linux/kstrtox.h. Unfortunately, the compat support via linux/kernel.h was +dropped and thus references to kstrtou64 caused build errors + + batman-adv/net/batman-adv/gateway_common.c: In function ‘batadv_parse_throughput’: + batman-adv/net/batman-adv/gateway_common.c:55:15: error: implicit declaration of function ‘kstrtou64’ [-Werror=implicit-function-declaration] + 55 | ret = kstrtou64(buff, 10, <hroughput); + | ^~~~~~~~~ + +Signed-off-by: Sven Eckelmann +Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/8924adbdf993cd0521f9d0024b43e3b23af5114f + +--- a/compat-include/linux/kstrtox.h ++++ b/compat-include/linux/kstrtox.h +@@ -11,7 +11,8 @@ + #define _NET_BATMAN_ADV_COMPAT_LINUX_KSTRTOX_H_ + + #include +-#if LINUX_VERSION_IS_GEQ(5, 14, 0) ++#if (LINUX_VERSION_IS_GEQ(5, 10, 185) && LINUX_VERSION_IS_LESS(5, 11, 0)) || \ ++ LINUX_VERSION_IS_GEQ(5, 14, 0) + #include_next + #else + #include diff --git a/batman-adv/patches/0015-batman-adv-Do-not-get-eth-header-before-batadv_check.patch b/batman-adv/patches/0015-batman-adv-Do-not-get-eth-header-before-batadv_check.patch new file mode 100644 index 0000000..f2c0f15 --- /dev/null +++ b/batman-adv/patches/0015-batman-adv-Do-not-get-eth-header-before-batadv_check.patch @@ -0,0 +1,111 @@ +From: Remi Pommarel +Date: Fri, 28 Jul 2023 15:38:50 +0200 +Subject: batman-adv: Do not get eth header before batadv_check_management_packet + +If received skb in batadv_v_elp_packet_recv or batadv_v_ogm_packet_recv +is either cloned or non linearized then its data buffer will be +reallocated by batadv_check_management_packet when skb_cow or +skb_linearize get called. Thus geting ethernet header address inside +skb data buffer before batadv_check_management_packet had any chance to +reallocate it could lead to the following kernel panic: + + Unable to handle kernel paging request at virtual address ffffff8020ab069a + Mem abort info: + ESR = 0x96000007 + EC = 0x25: DABT (current EL), IL = 32 bits + SET = 0, FnV = 0 + EA = 0, S1PTW = 0 + FSC = 0x07: level 3 translation fault + Data abort info: + ISV = 0, ISS = 0x00000007 + CM = 0, WnR = 0 + swapper pgtable: 4k pages, 39-bit VAs, pgdp=0000000040f45000 + [ffffff8020ab069a] pgd=180000007fffa003, p4d=180000007fffa003, pud=180000007fffa003, pmd=180000007fefe003, pte=0068000020ab0706 + Internal error: Oops: 96000007 [#1] SMP + Modules linked in: ahci_mvebu libahci_platform libahci dvb_usb_af9035 dvb_usb_dib0700 dib0070 dib7000m dibx000_common ath11k_pci ath10k_pci ath10k_core mwl8k_new nf_nat_sip nf_conntrack_sip xhci_plat_hcd xhci_hcd nf_nat_pptp nf_conntrack_pptp at24 sbsa_gwdt + CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.15.42-00066-g3242268d425c-dirty #550 + Hardware name: A8k (DT) + pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) + pc : batadv_is_my_mac+0x60/0xc0 + lr : batadv_v_ogm_packet_recv+0x98/0x5d0 + sp : ffffff8000183820 + x29: ffffff8000183820 x28: 0000000000000001 x27: ffffff8014f9af00 + x26: 0000000000000000 x25: 0000000000000543 x24: 0000000000000003 + x23: ffffff8020ab0580 x22: 0000000000000110 x21: ffffff80168ae880 + x20: 0000000000000000 x19: ffffff800b561000 x18: 0000000000000000 + x17: 0000000000000000 x16: 0000000000000000 x15: 00dc098924ae0032 + x14: 0f0405433e0054b0 x13: ffffffff00000080 x12: 0000004000000001 + x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 + x8 : 0000000000000000 x7 : ffffffc076dae000 x6 : ffffff8000183700 + x5 : ffffffc00955e698 x4 : ffffff80168ae000 x3 : ffffff80059cf000 + x2 : ffffff800b561000 x1 : ffffff8020ab0696 x0 : ffffff80168ae880 + Call trace: + batadv_is_my_mac+0x60/0xc0 + batadv_v_ogm_packet_recv+0x98/0x5d0 + batadv_batman_skb_recv+0x1b8/0x244 + __netif_receive_skb_core.isra.0+0x440/0xc74 + __netif_receive_skb_one_core+0x14/0x20 + netif_receive_skb+0x68/0x140 + br_pass_frame_up+0x70/0x80 + br_handle_frame_finish+0x108/0x284 + br_handle_frame+0x190/0x250 + __netif_receive_skb_core.isra.0+0x240/0xc74 + __netif_receive_skb_list_core+0x6c/0x90 + netif_receive_skb_list_internal+0x1f4/0x310 + napi_complete_done+0x64/0x1d0 + gro_cell_poll+0x7c/0xa0 + __napi_poll+0x34/0x174 + net_rx_action+0xf8/0x2a0 + _stext+0x12c/0x2ac + run_ksoftirqd+0x4c/0x7c + smpboot_thread_fn+0x120/0x210 + kthread+0x140/0x150 + ret_from_fork+0x10/0x20 + Code: f9403844 eb03009f 54fffee1 f94 + +Thus ethernet header address should only be fetched after +batadv_check_management_packet has been called. + +Fixes: 632835348e65 ("batman-adv: OGMv2 - add basic infrastructure") +Signed-off-by: Remi Pommarel +Signed-off-by: Sven Eckelmann +Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/670971ac7e9a47ee952848e0ea9128180e8fb991 + +--- a/net/batman-adv/bat_v_elp.c ++++ b/net/batman-adv/bat_v_elp.c +@@ -506,7 +506,7 @@ int batadv_v_elp_packet_recv(struct sk_b + struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); + struct batadv_elp_packet *elp_packet; + struct batadv_hard_iface *primary_if; +- struct ethhdr *ethhdr = (struct ethhdr *)skb_mac_header(skb); ++ struct ethhdr *ethhdr; + bool res; + int ret = NET_RX_DROP; + +@@ -514,6 +514,7 @@ int batadv_v_elp_packet_recv(struct sk_b + if (!res) + goto free_skb; + ++ ethhdr = eth_hdr(skb); + if (batadv_is_my_mac(bat_priv, ethhdr->h_source)) + goto free_skb; + +--- a/net/batman-adv/bat_v_ogm.c ++++ b/net/batman-adv/bat_v_ogm.c +@@ -985,7 +985,7 @@ int batadv_v_ogm_packet_recv(struct sk_b + { + struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); + struct batadv_ogm2_packet *ogm_packet; +- struct ethhdr *ethhdr = eth_hdr(skb); ++ struct ethhdr *ethhdr; + int ogm_offset; + u8 *packet_pos; + int ret = NET_RX_DROP; +@@ -999,6 +999,7 @@ int batadv_v_ogm_packet_recv(struct sk_b + if (!batadv_check_management_packet(skb, if_incoming, BATADV_OGM2_HLEN)) + goto free_skb; + ++ ethhdr = eth_hdr(skb); + if (batadv_is_my_mac(bat_priv, ethhdr->h_source)) + goto free_skb; + diff --git a/batman-adv/patches/0016-batman-adv-Trigger-events-for-auto-adjusted-MTU.patch b/batman-adv/patches/0016-batman-adv-Trigger-events-for-auto-adjusted-MTU.patch new file mode 100644 index 0000000..e1a04f0 --- /dev/null +++ b/batman-adv/patches/0016-batman-adv-Trigger-events-for-auto-adjusted-MTU.patch @@ -0,0 +1,28 @@ +From: Sven Eckelmann +Date: Wed, 19 Jul 2023 10:15:05 +0200 +Subject: batman-adv: Trigger events for auto adjusted MTU + +If an interface changes the MTU, it is expected that an NETDEV_PRECHANGEMTU +and NETDEV_CHANGEMTU notification events is triggered. This worked fine for +.ndo_change_mtu based changes because core networking code took care of it. +But for auto-adjustments after hard-interfaces changes, these events were +simply missing. + +Due to this problem, non-batman-adv components weren't aware of MTU changes +and thus couldn't perform their own tasks correctly. + +Fixes: 8009e9f7ac4f ("set bat0 MTU according to the MTUs of the hard interfaces") +Signed-off-by: Sven Eckelmann +Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/27c4d7c1c7fa39d71ea6ccf1c23bcb4773243800 + +--- a/net/batman-adv/hard-interface.c ++++ b/net/batman-adv/hard-interface.c +@@ -626,7 +626,7 @@ out: + */ + void batadv_update_min_mtu(struct net_device *soft_iface) + { +- soft_iface->mtu = batadv_hardif_min_mtu(soft_iface); ++ dev_set_mtu(soft_iface, batadv_hardif_min_mtu(soft_iface)); + + /* Check if the local translate table should be cleaned up to match a + * new (and smaller) MTU. diff --git a/batman-adv/patches/0017-batman-adv-Don-t-increase-MTU-when-set-by-user.patch b/batman-adv/patches/0017-batman-adv-Don-t-increase-MTU-when-set-by-user.patch new file mode 100644 index 0000000..74e58ae --- /dev/null +++ b/batman-adv/patches/0017-batman-adv-Don-t-increase-MTU-when-set-by-user.patch @@ -0,0 +1,71 @@ +From: Sven Eckelmann +Date: Wed, 19 Jul 2023 10:15:06 +0200 +Subject: batman-adv: Don't increase MTU when set by user + +If the user set an MTU value, it usually means that there are special +requirements for the MTU. But if an interface gots activated, the MTU was +always recalculated and then the user set value was overwritten. + +The only reason why this user set value has to be overwritten, is when the +MTU has to be decreased because batman-adv is not able to transfer packets +with the user specified size. + +Fixes: 88861ea9acb7 ("[batman-adv] replacing if up/down timer with kernel notifications") +Signed-off-by: Sven Eckelmann +Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/2745af592150b758ee96abf9329dd5f42cf22c25 + +--- a/net/batman-adv/hard-interface.c ++++ b/net/batman-adv/hard-interface.c +@@ -626,7 +626,19 @@ out: + */ + void batadv_update_min_mtu(struct net_device *soft_iface) + { +- dev_set_mtu(soft_iface, batadv_hardif_min_mtu(soft_iface)); ++ struct batadv_priv *bat_priv = netdev_priv(soft_iface); ++ int limit_mtu; ++ int mtu; ++ ++ mtu = batadv_hardif_min_mtu(soft_iface); ++ ++ if (bat_priv->mtu_set_by_user) ++ limit_mtu = bat_priv->mtu_set_by_user; ++ else ++ limit_mtu = ETH_DATA_LEN; ++ ++ mtu = min(mtu, limit_mtu); ++ dev_set_mtu(soft_iface, mtu); + + /* Check if the local translate table should be cleaned up to match a + * new (and smaller) MTU. +--- a/net/batman-adv/soft-interface.c ++++ b/net/batman-adv/soft-interface.c +@@ -154,11 +154,14 @@ static int batadv_interface_set_mac_addr + + static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) + { ++ struct batadv_priv *bat_priv = netdev_priv(dev); ++ + /* check ranges */ + if (new_mtu < 68 || new_mtu > batadv_hardif_min_mtu(dev)) + return -EINVAL; + + dev->mtu = new_mtu; ++ bat_priv->mtu_set_by_user = new_mtu; + + return 0; + } +--- a/net/batman-adv/types.h ++++ b/net/batman-adv/types.h +@@ -1547,6 +1547,12 @@ struct batadv_priv { + struct net_device *soft_iface; + + /** ++ * @mtu_set_by_user: MTU was set once by user ++ * protected by rtnl_lock ++ */ ++ int mtu_set_by_user; ++ ++ /** + * @bat_counters: mesh internal traffic statistic counters (see + * batadv_counters) + */ diff --git a/batman-adv/patches/0018-batman-adv-Fix-TT-global-entry-leak-when-client-roam.patch b/batman-adv/patches/0018-batman-adv-Fix-TT-global-entry-leak-when-client-roam.patch new file mode 100644 index 0000000..75c6f55 --- /dev/null +++ b/batman-adv/patches/0018-batman-adv-Fix-TT-global-entry-leak-when-client-roam.patch @@ -0,0 +1,76 @@ +From: Remi Pommarel +Date: Fri, 4 Aug 2023 11:39:36 +0200 +Subject: batman-adv: Fix TT global entry leak when client roamed back + +When a client roamed back to a node before it got time to destroy the +pending local entry (i.e. within the same originator interval) the old +global one is directly removed from hash table and left as such. + +But because this entry had an extra reference taken at lookup (i.e using +batadv_tt_global_hash_find) there is no way its memory will be reclaimed +at any time causing the following memory leak: + + unreferenced object 0xffff0000073c8000 (size 18560): + comm "softirq", pid 0, jiffies 4294907738 (age 228.644s) + hex dump (first 32 bytes): + 06 31 ac 12 c7 7a 05 00 01 00 00 00 00 00 00 00 .1...z.......... + 2c ad be 08 00 80 ff ff 6c b6 be 08 00 80 ff ff ,.......l....... + backtrace: + [<00000000ee6e0ffa>] kmem_cache_alloc+0x1b4/0x300 + [<000000000ff2fdbc>] batadv_tt_global_add+0x700/0xe20 + [<00000000443897c7>] _batadv_tt_update_changes+0x21c/0x790 + [<000000005dd90463>] batadv_tt_update_changes+0x3c/0x110 + [<00000000a2d7fc57>] batadv_tt_tvlv_unicast_handler_v1+0xafc/0xe10 + [<0000000011793f2a>] batadv_tvlv_containers_process+0x168/0x2b0 + [<00000000b7cbe2ef>] batadv_recv_unicast_tvlv+0xec/0x1f4 + [<0000000042aef1d8>] batadv_batman_skb_recv+0x25c/0x3a0 + [<00000000bbd8b0a2>] __netif_receive_skb_core.isra.0+0x7a8/0xe90 + [<000000004033d428>] __netif_receive_skb_one_core+0x64/0x74 + [<000000000f39a009>] __netif_receive_skb+0x48/0xe0 + [<00000000f2cd8888>] process_backlog+0x174/0x344 + [<00000000507d6564>] __napi_poll+0x58/0x1f4 + [<00000000b64ef9eb>] net_rx_action+0x504/0x590 + [<00000000056fa5e4>] _stext+0x1b8/0x418 + [<00000000878879d6>] run_ksoftirqd+0x74/0xa4 + unreferenced object 0xffff00000bae1a80 (size 56): + comm "softirq", pid 0, jiffies 4294910888 (age 216.092s) + hex dump (first 32 bytes): + 00 78 b1 0b 00 00 ff ff 0d 50 00 00 00 00 00 00 .x.......P...... + 00 00 00 00 00 00 00 00 50 c8 3c 07 00 00 ff ff ........P.<..... + backtrace: + [<00000000ee6e0ffa>] kmem_cache_alloc+0x1b4/0x300 + [<00000000d9aaa49e>] batadv_tt_global_add+0x53c/0xe20 + [<00000000443897c7>] _batadv_tt_update_changes+0x21c/0x790 + [<000000005dd90463>] batadv_tt_update_changes+0x3c/0x110 + [<00000000a2d7fc57>] batadv_tt_tvlv_unicast_handler_v1+0xafc/0xe10 + [<0000000011793f2a>] batadv_tvlv_containers_process+0x168/0x2b0 + [<00000000b7cbe2ef>] batadv_recv_unicast_tvlv+0xec/0x1f4 + [<0000000042aef1d8>] batadv_batman_skb_recv+0x25c/0x3a0 + [<00000000bbd8b0a2>] __netif_receive_skb_core.isra.0+0x7a8/0xe90 + [<000000004033d428>] __netif_receive_skb_one_core+0x64/0x74 + [<000000000f39a009>] __netif_receive_skb+0x48/0xe0 + [<00000000f2cd8888>] process_backlog+0x174/0x344 + [<00000000507d6564>] __napi_poll+0x58/0x1f4 + [<00000000b64ef9eb>] net_rx_action+0x504/0x590 + [<00000000056fa5e4>] _stext+0x1b8/0x418 + [<00000000878879d6>] run_ksoftirqd+0x74/0xa4 + +Releasing the extra reference from batadv_tt_global_hash_find even at +roam back when batadv_tt_global_free is called fixes this memory leak. + +Cc: stable@vger.kernel.org +Fixes: 2443ba383c7d ("batman-adv: roaming handling mechanism redesign") +Signed-off-by: Remi Pommarel +Signed-off-by: Sven Eckelmann +Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/26fce59c70729e07034de966ac5fd2d5c1f2d597 + +--- a/net/batman-adv/translation-table.c ++++ b/net/batman-adv/translation-table.c +@@ -774,7 +774,6 @@ check_roaming: + if (roamed_back) { + batadv_tt_global_free(bat_priv, tt_global, + "Roaming canceled"); +- tt_global = NULL; + } else { + /* The global entry has to be marked as ROAMING and + * has to be kept for consistency purpose diff --git a/batman-adv/patches/0019-batman-adv-Fix-batadv_v_ogm_aggr_send-memory-leak.patch b/batman-adv/patches/0019-batman-adv-Fix-batadv_v_ogm_aggr_send-memory-leak.patch new file mode 100644 index 0000000..93691fb --- /dev/null +++ b/batman-adv/patches/0019-batman-adv-Fix-batadv_v_ogm_aggr_send-memory-leak.patch @@ -0,0 +1,47 @@ +From: Remi Pommarel +Date: Wed, 9 Aug 2023 17:29:13 +0200 +Subject: batman-adv: Fix batadv_v_ogm_aggr_send memory leak + +When batadv_v_ogm_aggr_send is called for an inactive interface, the skb +is silently dropped by batadv_v_ogm_send_to_if() but never freed causing +the following memory leak: + + unreferenced object 0xffff00000c164800 (size 512): + comm "kworker/u8:1", pid 2648, jiffies 4295122303 (age 97.656s) + hex dump (first 32 bytes): + 00 80 af 09 00 00 ff ff e1 09 00 00 75 01 60 83 ............u.`. + 1f 00 00 00 b8 00 00 00 15 00 05 00 da e3 d3 64 ...............d + backtrace: + [<0000000007ad20f6>] __kmalloc_track_caller+0x1a8/0x310 + [<00000000d1029e55>] kmalloc_reserve.constprop.0+0x70/0x13c + [<000000008b9d4183>] __alloc_skb+0xec/0x1fc + [<00000000c7af5051>] __netdev_alloc_skb+0x48/0x23c + [<00000000642ee5f5>] batadv_v_ogm_aggr_send+0x50/0x36c + [<0000000088660bd7>] batadv_v_ogm_aggr_work+0x24/0x40 + [<0000000042fc2606>] process_one_work+0x3b0/0x610 + [<000000002f2a0b1c>] worker_thread+0xa0/0x690 + [<0000000059fae5d4>] kthread+0x1fc/0x210 + [<000000000c587d3a>] ret_from_fork+0x10/0x20 + +Free the skb in that case to fix this leak. + +Cc: stable@vger.kernel.org +Fixes: 632835348e65 ("batman-adv: OGMv2 - add basic infrastructure") +Signed-off-by: Remi Pommarel +Signed-off-by: Sven Eckelmann +Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/9024db261180f73fc687a9ecc7e79e3b0ccf50dc + +--- a/net/batman-adv/bat_v_ogm.c ++++ b/net/batman-adv/bat_v_ogm.c +@@ -123,8 +123,10 @@ static void batadv_v_ogm_send_to_if(stru + { + struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); + +- if (hard_iface->if_status != BATADV_IF_ACTIVE) ++ if (hard_iface->if_status != BATADV_IF_ACTIVE) { ++ kfree_skb(skb); + return; ++ } + + batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); + batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES,