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Merge pull request #1014 from ecsv/batadv-for-22.03
openwrt-22.03: batman-adv: Merge bugfixes from 2023.2
This commit is contained in:
Simon Wunderlich
GitHub
commit
05b717a999
@ -0,0 +1,48 @@
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From: Vladislav Efanov <VEfanov@ispras.ru>
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Date: Fri, 26 May 2023 19:16:32 +0300
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Subject: batman-adv: Broken sync while rescheduling delayed work
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Syzkaller got a lot of crashes like:
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KASAN: use-after-free Write in *_timers*
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All of these crashes point to the same memory area:
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The buggy address belongs to the object at ffff88801f870000
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which belongs to the cache kmalloc-8k of size 8192
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The buggy address is located 5320 bytes inside of
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8192-byte region [ffff88801f870000, ffff88801f872000)
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This area belongs to :
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batadv_priv->batadv_priv_dat->delayed_work->timer_list
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The reason for these issues is the lack of synchronization. Delayed
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work (batadv_dat_purge) schedules new timer/work while the device
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is being deleted. As the result new timer/delayed work is set after
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cancel_delayed_work_sync() was called. So after the device is freed
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the timer list contains pointer to already freed memory.
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Found by Linux Verification Center (linuxtesting.org) with syzkaller.
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Fixes: f6badf9eb582 ("batman-adv: Distributed ARP Table - implement local storage")
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Signed-off-by: Vladislav Efanov <VEfanov@ispras.ru>
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/177ba85fb2d4ca2ecd30ca16803560e80e916fac
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--- a/net/batman-adv/distributed-arp-table.c
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+++ b/net/batman-adv/distributed-arp-table.c
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@@ -101,7 +101,6 @@ static void batadv_dat_purge(struct work
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*/
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static void batadv_dat_start_timer(struct batadv_priv *bat_priv)
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{
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- INIT_DELAYED_WORK(&bat_priv->dat.work, batadv_dat_purge);
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queue_delayed_work(batadv_event_workqueue, &bat_priv->dat.work,
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msecs_to_jiffies(10000));
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}
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@@ -819,6 +818,7 @@ int batadv_dat_init(struct batadv_priv *
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if (!bat_priv->dat.hash)
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return -ENOMEM;
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+ INIT_DELAYED_WORK(&bat_priv->dat.work, batadv_dat_purge);
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batadv_dat_start_timer(bat_priv);
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batadv_tvlv_handler_register(bat_priv, batadv_dat_tvlv_ogm_handler_v1,
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@ -0,0 +1,29 @@
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From: Sven Eckelmann <sven@narfation.org>
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Date: Tue, 11 Jul 2023 11:46:30 +0200
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Subject: batman-adv: compat: Use native kstrtox.h for 5.10.185
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Upstream stable commit 6e2e551e39fd ("kernel.h: split out kstrtox() and
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simple_strtox() to a separate header") backported the support for
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linux/kstrtox.h. Unfortunately, the compat support via linux/kernel.h was
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dropped and thus references to kstrtou64 caused build errors
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batman-adv/net/batman-adv/gateway_common.c: In function ‘batadv_parse_throughput’:
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batman-adv/net/batman-adv/gateway_common.c:55:15: error: implicit declaration of function ‘kstrtou64’ [-Werror=implicit-function-declaration]
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55 | ret = kstrtou64(buff, 10, <hroughput);
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| ^~~~~~~~~
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/8924adbdf993cd0521f9d0024b43e3b23af5114f
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--- a/compat-include/linux/kstrtox.h
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+++ b/compat-include/linux/kstrtox.h
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@@ -11,7 +11,8 @@
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#define _NET_BATMAN_ADV_COMPAT_LINUX_KSTRTOX_H_
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#include <linux/version.h>
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-#if LINUX_VERSION_IS_GEQ(5, 14, 0)
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+#if (LINUX_VERSION_IS_GEQ(5, 10, 185) && LINUX_VERSION_IS_LESS(5, 11, 0)) || \
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+ LINUX_VERSION_IS_GEQ(5, 14, 0)
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#include_next <linux/kstrtox.h>
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#else
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#include <linux/kernel.h>
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@ -0,0 +1,111 @@
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From: Remi Pommarel <repk@triplefau.lt>
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Date: Fri, 28 Jul 2023 15:38:50 +0200
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Subject: batman-adv: Do not get eth header before batadv_check_management_packet
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If received skb in batadv_v_elp_packet_recv or batadv_v_ogm_packet_recv
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is either cloned or non linearized then its data buffer will be
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reallocated by batadv_check_management_packet when skb_cow or
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skb_linearize get called. Thus geting ethernet header address inside
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skb data buffer before batadv_check_management_packet had any chance to
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reallocate it could lead to the following kernel panic:
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Unable to handle kernel paging request at virtual address ffffff8020ab069a
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Mem abort info:
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ESR = 0x96000007
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EC = 0x25: DABT (current EL), IL = 32 bits
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SET = 0, FnV = 0
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EA = 0, S1PTW = 0
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FSC = 0x07: level 3 translation fault
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Data abort info:
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ISV = 0, ISS = 0x00000007
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CM = 0, WnR = 0
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swapper pgtable: 4k pages, 39-bit VAs, pgdp=0000000040f45000
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[ffffff8020ab069a] pgd=180000007fffa003, p4d=180000007fffa003, pud=180000007fffa003, pmd=180000007fefe003, pte=0068000020ab0706
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Internal error: Oops: 96000007 [#1] SMP
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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
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CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.15.42-00066-g3242268d425c-dirty #550
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Hardware name: A8k (DT)
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pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
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pc : batadv_is_my_mac+0x60/0xc0
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lr : batadv_v_ogm_packet_recv+0x98/0x5d0
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sp : ffffff8000183820
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x29: ffffff8000183820 x28: 0000000000000001 x27: ffffff8014f9af00
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x26: 0000000000000000 x25: 0000000000000543 x24: 0000000000000003
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x23: ffffff8020ab0580 x22: 0000000000000110 x21: ffffff80168ae880
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x20: 0000000000000000 x19: ffffff800b561000 x18: 0000000000000000
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x17: 0000000000000000 x16: 0000000000000000 x15: 00dc098924ae0032
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x14: 0f0405433e0054b0 x13: ffffffff00000080 x12: 0000004000000001
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x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000
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x8 : 0000000000000000 x7 : ffffffc076dae000 x6 : ffffff8000183700
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x5 : ffffffc00955e698 x4 : ffffff80168ae000 x3 : ffffff80059cf000
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x2 : ffffff800b561000 x1 : ffffff8020ab0696 x0 : ffffff80168ae880
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Call trace:
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batadv_is_my_mac+0x60/0xc0
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batadv_v_ogm_packet_recv+0x98/0x5d0
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batadv_batman_skb_recv+0x1b8/0x244
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__netif_receive_skb_core.isra.0+0x440/0xc74
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__netif_receive_skb_one_core+0x14/0x20
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netif_receive_skb+0x68/0x140
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br_pass_frame_up+0x70/0x80
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br_handle_frame_finish+0x108/0x284
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br_handle_frame+0x190/0x250
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__netif_receive_skb_core.isra.0+0x240/0xc74
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__netif_receive_skb_list_core+0x6c/0x90
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netif_receive_skb_list_internal+0x1f4/0x310
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napi_complete_done+0x64/0x1d0
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gro_cell_poll+0x7c/0xa0
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__napi_poll+0x34/0x174
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net_rx_action+0xf8/0x2a0
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_stext+0x12c/0x2ac
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run_ksoftirqd+0x4c/0x7c
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smpboot_thread_fn+0x120/0x210
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kthread+0x140/0x150
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ret_from_fork+0x10/0x20
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Code: f9403844 eb03009f 54fffee1 f94
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Thus ethernet header address should only be fetched after
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batadv_check_management_packet has been called.
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Fixes: 632835348e65 ("batman-adv: OGMv2 - add basic infrastructure")
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Signed-off-by: Remi Pommarel <repk@triplefau.lt>
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/670971ac7e9a47ee952848e0ea9128180e8fb991
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--- a/net/batman-adv/bat_v_elp.c
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+++ b/net/batman-adv/bat_v_elp.c
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@@ -506,7 +506,7 @@ int batadv_v_elp_packet_recv(struct sk_b
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struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
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struct batadv_elp_packet *elp_packet;
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struct batadv_hard_iface *primary_if;
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- struct ethhdr *ethhdr = (struct ethhdr *)skb_mac_header(skb);
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+ struct ethhdr *ethhdr;
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bool res;
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int ret = NET_RX_DROP;
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@@ -514,6 +514,7 @@ int batadv_v_elp_packet_recv(struct sk_b
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if (!res)
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goto free_skb;
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+ ethhdr = eth_hdr(skb);
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if (batadv_is_my_mac(bat_priv, ethhdr->h_source))
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goto free_skb;
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--- a/net/batman-adv/bat_v_ogm.c
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+++ b/net/batman-adv/bat_v_ogm.c
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@@ -985,7 +985,7 @@ int batadv_v_ogm_packet_recv(struct sk_b
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{
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struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
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struct batadv_ogm2_packet *ogm_packet;
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- struct ethhdr *ethhdr = eth_hdr(skb);
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+ struct ethhdr *ethhdr;
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int ogm_offset;
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u8 *packet_pos;
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int ret = NET_RX_DROP;
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@@ -999,6 +999,7 @@ int batadv_v_ogm_packet_recv(struct sk_b
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if (!batadv_check_management_packet(skb, if_incoming, BATADV_OGM2_HLEN))
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goto free_skb;
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+ ethhdr = eth_hdr(skb);
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if (batadv_is_my_mac(bat_priv, ethhdr->h_source))
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goto free_skb;
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@ -0,0 +1,28 @@
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From: Sven Eckelmann <sven@narfation.org>
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Date: Wed, 19 Jul 2023 10:15:05 +0200
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Subject: batman-adv: Trigger events for auto adjusted MTU
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If an interface changes the MTU, it is expected that an NETDEV_PRECHANGEMTU
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and NETDEV_CHANGEMTU notification events is triggered. This worked fine for
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.ndo_change_mtu based changes because core networking code took care of it.
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But for auto-adjustments after hard-interfaces changes, these events were
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simply missing.
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Due to this problem, non-batman-adv components weren't aware of MTU changes
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and thus couldn't perform their own tasks correctly.
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Fixes: 8009e9f7ac4f ("set bat0 MTU according to the MTUs of the hard interfaces")
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/27c4d7c1c7fa39d71ea6ccf1c23bcb4773243800
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--- a/net/batman-adv/hard-interface.c
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+++ b/net/batman-adv/hard-interface.c
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@@ -626,7 +626,7 @@ out:
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*/
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void batadv_update_min_mtu(struct net_device *soft_iface)
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{
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- soft_iface->mtu = batadv_hardif_min_mtu(soft_iface);
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+ dev_set_mtu(soft_iface, batadv_hardif_min_mtu(soft_iface));
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/* Check if the local translate table should be cleaned up to match a
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* new (and smaller) MTU.
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@ -0,0 +1,71 @@
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From: Sven Eckelmann <sven@narfation.org>
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Date: Wed, 19 Jul 2023 10:15:06 +0200
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Subject: batman-adv: Don't increase MTU when set by user
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If the user set an MTU value, it usually means that there are special
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requirements for the MTU. But if an interface gots activated, the MTU was
|
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always recalculated and then the user set value was overwritten.
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The only reason why this user set value has to be overwritten, is when the
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MTU has to be decreased because batman-adv is not able to transfer packets
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with the user specified size.
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Fixes: 88861ea9acb7 ("[batman-adv] replacing if up/down timer with kernel notifications")
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
|
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Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/2745af592150b758ee96abf9329dd5f42cf22c25
|
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|
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--- a/net/batman-adv/hard-interface.c
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+++ b/net/batman-adv/hard-interface.c
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@@ -626,7 +626,19 @@ out:
|
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*/
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void batadv_update_min_mtu(struct net_device *soft_iface)
|
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{
|
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- dev_set_mtu(soft_iface, batadv_hardif_min_mtu(soft_iface));
|
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+ struct batadv_priv *bat_priv = netdev_priv(soft_iface);
|
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+ int limit_mtu;
|
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+ int mtu;
|
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+
|
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+ mtu = batadv_hardif_min_mtu(soft_iface);
|
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+
|
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+ if (bat_priv->mtu_set_by_user)
|
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+ limit_mtu = bat_priv->mtu_set_by_user;
|
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+ else
|
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+ limit_mtu = ETH_DATA_LEN;
|
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+
|
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+ mtu = min(mtu, limit_mtu);
|
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+ dev_set_mtu(soft_iface, mtu);
|
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|
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/* Check if the local translate table should be cleaned up to match a
|
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* new (and smaller) MTU.
|
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--- a/net/batman-adv/soft-interface.c
|
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+++ b/net/batman-adv/soft-interface.c
|
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@@ -154,11 +154,14 @@ static int batadv_interface_set_mac_addr
|
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|
||||
static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
|
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{
|
||||
+ struct batadv_priv *bat_priv = netdev_priv(dev);
|
||||
+
|
||||
/* check ranges */
|
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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;
|
||||
}
|
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--- a/net/batman-adv/types.h
|
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+++ b/net/batman-adv/types.h
|
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@@ -1547,6 +1547,12 @@ struct batadv_priv {
|
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struct net_device *soft_iface;
|
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|
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/**
|
||||
+ * @mtu_set_by_user: MTU was set once by user
|
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+ * protected by rtnl_lock
|
||||
+ */
|
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+ int mtu_set_by_user;
|
||||
+
|
||||
+ /**
|
||||
* @bat_counters: mesh internal traffic statistic counters (see
|
||||
* batadv_counters)
|
||||
*/
|
||||
@ -0,0 +1,76 @@
|
||||
From: Remi Pommarel <repk@triplefau.lt>
|
||||
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 <repk@triplefau.lt>
|
||||
Signed-off-by: Sven Eckelmann <sven@narfation.org>
|
||||
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
|
||||
@ -0,0 +1,47 @@
|
||||
From: Remi Pommarel <repk@triplefau.lt>
|
||||
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 <repk@triplefau.lt>
|
||||
Signed-off-by: Sven Eckelmann <sven@narfation.org>
|
||||
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,
|
||||
Loading…
Reference in New Issue
Block a user