======================================================
WARNING: possible circular locking dependency detected
6.7.0-rc7-syzkaller-00049-g453f5db0619e #0 Not tainted
------------------------------------------------------
syz-executor.0/28253 is trying to acquire lock:
ffff888028fb0218 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff888028fb0218 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: __dev_xmit_skb net/core/dev.c:3805 [inline]
ffff888028fb0218 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}, at: __dev_queue_xmit+0x2e8e/0x3d60 net/core/dev.c:4315
but task is already holding lock:
ffff88801cc9c8d8 (_xmit_ETHER#2){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff88801cc9c8d8 (_xmit_ETHER#2){+.-.}-{2:2}, at: __netif_tx_lock include/linux/netdevice.h:4403 [inline]
ffff88801cc9c8d8 (_xmit_ETHER#2){+.-.}-{2:2}, at: sch_direct_xmit+0x333/0xc20 net/sched/sch_generic.c:340
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (_xmit_ETHER#2){+.-.}-{2:2}:
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
__netif_tx_lock include/linux/netdevice.h:4403 [inline]
sch_direct_xmit+0x333/0xc20 net/sched/sch_generic.c:340
__dev_xmit_skb net/core/dev.c:3775 [inline]
__dev_queue_xmit+0x1286/0x3d60 net/core/dev.c:4315
lapb_data_transmit+0x93/0xc0 net/lapb/lapb_iface.c:447
lapb_transmit_buffer+0xce/0x390 net/lapb/lapb_out.c:149
lapb_send_control+0x1c8/0x320 net/lapb/lapb_subr.c:251
lapb_establish_data_link+0xeb/0x110 net/lapb/lapb_out.c:163
lapb_device_event+0x39e/0x570 net/lapb/lapb_iface.c:512
notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93
call_netdevice_notifiers_info+0xbe/0x130 net/core/dev.c:1967
call_netdevice_notifiers_extack net/core/dev.c:2005 [inline]
call_netdevice_notifiers net/core/dev.c:2019 [inline]
__dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8647
dev_change_flags+0x122/0x170 net/core/dev.c:8685
devinet_ioctl+0x13ef/0x1f10 net/ipv4/devinet.c:1167
inet_ioctl+0x3a6/0x3f0 net/ipv4/af_inet.c:997
sock_do_ioctl+0x113/0x270 net/socket.c:1220
sock_ioctl+0x22e/0x6b0 net/socket.c:1339
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
-> #0 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2433/0x3b20 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
__dev_xmit_skb net/core/dev.c:3805 [inline]
__dev_queue_xmit+0x2e8e/0x3d60 net/core/dev.c:4315
dev_queue_xmit include/linux/netdevice.h:3134 [inline]
neigh_resolve_output net/core/neighbour.c:1563 [inline]
neigh_resolve_output+0x58c/0x900 net/core/neighbour.c:1543
neigh_output include/net/neighbour.h:542 [inline]
ip6_finish_output2+0x679/0x1830 net/ipv6/ip6_output.c:137
__ip6_finish_output net/ipv6/ip6_output.c:211 [inline]
ip6_finish_output+0x3c7/0xf80 net/ipv6/ip6_output.c:222
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1e2/0x530 net/ipv6/ip6_output.c:243
dst_output include/net/dst.h:451 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
ndisc_send_skb+0xa13/0x18f0 net/ipv6/ndisc.c:509
ndisc_send_ns+0xc7/0x140 net/ipv6/ndisc.c:667
ndisc_solicit+0x2f7/0x510 net/ipv6/ndisc.c:759
neigh_probe+0xc2/0x110 net/core/neighbour.c:1075
__neigh_event_send+0xa50/0x1320 net/core/neighbour.c:1242
neigh_event_send_probe include/net/neighbour.h:466 [inline]
neigh_event_send include/net/neighbour.h:472 [inline]
neigh_event_send include/net/neighbour.h:470 [inline]
neigh_resolve_output+0x5b9/0x900 net/core/neighbour.c:1547
neigh_output include/net/neighbour.h:542 [inline]
ip6_finish_output2+0x679/0x1830 net/ipv6/ip6_output.c:137
__ip6_finish_output net/ipv6/ip6_output.c:211 [inline]
ip6_finish_output+0x3c7/0xf80 net/ipv6/ip6_output.c:222
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1e2/0x530 net/ipv6/ip6_output.c:243
dst_output include/net/dst.h:451 [inline]
ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:155
ip6_send_skb+0xcd/0x2d0 net/ipv6/ip6_output.c:1952
ip6_push_pending_frames+0xe0/0x100 net/ipv6/ip6_output.c:1972
icmpv6_push_pending_frames+0x2da/0x470 net/ipv6/icmp.c:307
icmp6_send+0x1d9c/0x2b00 net/ipv6/icmp.c:624
__icmpv6_send include/linux/icmpv6.h:28 [inline]
icmpv6_send include/linux/icmpv6.h:49 [inline]
ip6_link_failure+0x31/0x5a0 net/ipv6/route.c:2787
dst_link_failure include/net/dst.h:430 [inline]
ip_tunnel_xmit+0x2d87/0x33c0 net/ipv4/ip_tunnel.c:837
erspan_xmit+0x52b/0x1c00 net/ipv4/ip_gre.c:720
__netdev_start_xmit include/linux/netdevice.h:4940 [inline]
netdev_start_xmit include/linux/netdevice.h:4954 [inline]
xmit_one net/core/dev.c:3548 [inline]
dev_hard_start_xmit+0x13d/0x6d0 net/core/dev.c:3564
sch_direct_xmit+0x1ac/0xc20 net/sched/sch_generic.c:342
qdisc_restart net/sched/sch_generic.c:407 [inline]
__qdisc_run+0x54e/0x1a50 net/sched/sch_generic.c:415
__dev_xmit_skb net/core/dev.c:3838 [inline]
__dev_queue_xmit+0x24d8/0x3d60 net/core/dev.c:4315
dev_queue_xmit include/linux/netdevice.h:3134 [inline]
br_dev_queue_push_xmit+0x26e/0x7b0 net/bridge/br_forward.c:53
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
br_forward_finish+0xf5/0x120 net/bridge/br_forward.c:66
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
__br_forward+0x1e5/0x5b0 net/bridge/br_forward.c:115
deliver_clone+0x5b/0xa0 net/bridge/br_forward.c:131
maybe_deliver+0x316/0x3e0 net/bridge/br_forward.c:190
br_flood+0x17e/0x5c0 net/bridge/br_forward.c:236
br_dev_xmit+0x13f4/0x18a0 net/bridge/br_device.c:104
__netdev_start_xmit include/linux/netdevice.h:4940 [inline]
netdev_start_xmit include/linux/netdevice.h:4954 [inline]
xmit_one net/core/dev.c:3548 [inline]
dev_hard_start_xmit+0x13d/0x6d0 net/core/dev.c:3564
__dev_queue_xmit+0x7c1/0x3d60 net/core/dev.c:4349
dev_queue_xmit include/linux/netdevice.h:3134 [inline]
neigh_resolve_output net/core/neighbour.c:1563 [inline]
neigh_resolve_output+0x58c/0x900 net/core/neighbour.c:1543
__neigh_update+0xb57/0x2b80 net/core/neighbour.c:1461
ndisc_update net/ipv6/ndisc.c:782 [inline]
ndisc_recv_na+0xac2/0x1140 net/ipv6/ndisc.c:1109
ndisc_rcv+0x505/0x5f0 net/ipv6/ndisc.c:1848
icmpv6_rcv+0x1470/0x19c0 net/ipv6/icmp.c:979
ip6_protocol_deliver_rcu+0x170/0x13e0 net/ipv6/ip6_input.c:438
ip6_input_finish+0x14f/0x2f0 net/ipv6/ip6_input.c:483
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip6_input+0xa1/0xc0 net/ipv6/ip6_input.c:492
dst_input include/net/dst.h:461 [inline]
ip6_rcv_finish+0x196/0x2c0 net/ipv6/ip6_input.c:79
ip_sabotage_in+0x224/0x2a0 net/bridge/br_netfilter_hooks.c:882
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xbb/0x1f0 net/netfilter/core.c:626
nf_hook.constprop.0+0x42f/0x750 include/linux/netfilter.h:269
NF_HOOK include/linux/netfilter.h:312 [inline]
ipv6_rcv+0xa4/0x380 net/ipv6/ip6_input.c:310
__netif_receive_skb_one_core+0x115/0x180 net/core/dev.c:5532
__netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5646
netif_receive_skb_internal net/core/dev.c:5732 [inline]
netif_receive_skb+0x133/0x700 net/core/dev.c:5791
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
br_pass_frame_up+0x2fa/0x420 net/bridge/br_input.c:68
br_handle_frame_finish+0xdde/0x1dc0 net/bridge/br_input.c:216
br_nf_hook_thresh+0x2ff/0x410 net/bridge/br_netfilter_hooks.c:1044
br_nf_pre_routing_finish_ipv6+0x683/0xf20 net/bridge/br_netfilter_ipv6.c:148
NF_HOOK include/linux/netfilter.h:314 [inline]
br_nf_pre_routing_ipv6+0x3ce/0x8c0 net/bridge/br_netfilter_ipv6.c:178
br_nf_pre_routing+0x85e/0x15a0 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:272 [inline]
br_handle_frame+0x9df/0x1440 net/bridge/br_input.c:417
__netif_receive_skb_core.constprop.0+0x9f7/0x3f50 net/core/dev.c:5426
__netif_receive_skb_one_core+0xaf/0x180 net/core/dev.c:5530
__netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5646
process_backlog+0x101/0x6b0 net/core/dev.c:5974
__napi_poll.constprop.0+0xb4/0x540 net/core/dev.c:6536
napi_poll net/core/dev.c:6605 [inline]
net_rx_action+0x956/0xe90 net/core/dev.c:6738
__do_softirq+0x21a/0x8de kernel/softirq.c:553
do_softirq kernel/softirq.c:454 [inline]
do_softirq+0xaa/0xe0 kernel/softirq.c:441
__local_bh_enable_ip+0xfc/0x120 kernel/softirq.c:381
local_bh_enable include/linux/bottom_half.h:33 [inline]
__neigh_event_send+0x31c/0x1320 net/core/neighbour.c:1245
neigh_event_send_probe include/net/neighbour.h:466 [inline]
neigh_event_send include/net/neighbour.h:472 [inline]
neigh_event_send include/net/neighbour.h:470 [inline]
neigh_resolve_output+0x5b9/0x900 net/core/neighbour.c:1547
neigh_output include/net/neighbour.h:542 [inline]
ip6_finish_output2+0x679/0x1830 net/ipv6/ip6_output.c:137
__ip6_finish_output net/ipv6/ip6_output.c:211 [inline]
ip6_finish_output+0x3c7/0xf80 net/ipv6/ip6_output.c:222
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1e2/0x530 net/ipv6/ip6_output.c:243
dst_output include/net/dst.h:451 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip6_xmit+0x1234/0x1cc0 net/ipv6/ip6_output.c:358
inet6_csk_xmit+0x3ce/0x740 net/ipv6/inet6_connection_sock.c:135
__tcp_transmit_skb+0x1aa5/0x3d10 net/ipv4/tcp_output.c:1462
tcp_transmit_skb net/ipv4/tcp_output.c:1480 [inline]
tcp_connect+0x3593/0x5280 net/ipv4/tcp_output.c:4100
tcp_v6_connect+0x1543/0x20c0 net/ipv6/tcp_ipv6.c:332
mptcp_connect+0x349/0x960 net/mptcp/protocol.c:3711
__inet_stream_connect+0x3c5/0x1020 net/ipv4/af_inet.c:675
inet_stream_connect+0x57/0xa0 net/ipv4/af_inet.c:746
__sys_connect_file+0x15b/0x1a0 net/socket.c:2046
__sys_connect+0x145/0x170 net/socket.c:2063
__do_sys_connect net/socket.c:2073 [inline]
__se_sys_connect net/socket.c:2070 [inline]
__x64_sys_connect+0x72/0xb0 net/socket.c:2070
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(_xmit_ETHER#2);
lock(dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
lock(_xmit_ETHER#2);
lock(dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
*** DEADLOCK ***
19 locks held by syz-executor.0/28253:
#0: ffff8880317019b0 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1720 [inline]
#0: ffff8880317019b0 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_stream_connect+0x43/0xa0 net/ipv4/af_inet.c:745
#1: ffff88807d6f3530 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1720 [inline]
#1: ffff88807d6f3530 (k-sk_lock-AF_INET6){+.+.}-{0:0}, at: mptcp_connect+0x45c/0x960 net/mptcp/protocol.c:3697
#2: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#2: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#2: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: inet6_csk_xmit+0x18a/0x740 net/ipv6/inet6_connection_sock.c:129
#3: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#3: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#3: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: ip6_finish_output2+0x3ba/0x1830 net/ipv6/ip6_output.c:122
#4: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#4: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#4: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: process_backlog+0x25d/0x6b0 net/core/dev.c:5973
#5: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#5: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#5: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: netif_receive_skb_internal net/core/dev.c:5719 [inline]
#5: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: netif_receive_skb+0xfd/0x700 net/core/dev.c:5791
#6: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#6: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#6: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: nf_hook.constprop.0+0xa4/0x750 include/linux/netfilter.h:238
#7: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#7: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#7: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: ip6_input_finish+0x11c/0x2f0 net/ipv6/ip6_input.c:482
#8: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#8: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#8: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: __neigh_update+0xa23/0x2b80 net/core/neighbour.c:1446
#9: ffffffff8cfab700 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#9: ffffffff8cfab700 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:799 [inline]
#9: ffffffff8cfab700 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x244/0x3d60 net/core/dev.c:4274
#10: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#10: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#10: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: br_dev_xmit+0x117/0x18a0 net/bridge/br_device.c:44
#11: ffffffff8cfab700 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#11: ffffffff8cfab700 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:799 [inline]
#11: ffffffff8cfab700 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x244/0x3d60 net/core/dev.c:4274
#12: ffff88801cc9c8d8 (_xmit_ETHER#2){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#12: ffff88801cc9c8d8 (_xmit_ETHER#2){+.-.}-{2:2}, at: __netif_tx_lock include/linux/netdevice.h:4403 [inline]
#12: ffff88801cc9c8d8 (_xmit_ETHER#2){+.-.}-{2:2}, at: sch_direct_xmit+0x333/0xc20 net/sched/sch_generic.c:340
#13: ffff888025d007f0 (k-slock-AF_INET6){+.-.}-{2:2}, at: spin_trylock include/linux/spinlock.h:361 [inline]
#13: ffff888025d007f0 (k-slock-AF_INET6){+.-.}-{2:2}, at: icmpv6_xmit_lock net/ipv6/icmp.c:108 [inline]
#13: ffff888025d007f0 (k-slock-AF_INET6){+.-.}-{2:2}, at: icmp6_send+0xfbf/0x2b00 net/ipv6/icmp.c:545
#14: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#14: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#14: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: icmp6_send+0x16e5/0x2b00 net/ipv6/icmp.c:613
#15: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#15: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#15: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: ip6_finish_output2+0x3ba/0x1830 net/ipv6/ip6_output.c:122
#16: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#16: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#16: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: ndisc_send_skb+0x864/0x18f0 net/ipv6/ndisc.c:505
#17: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#17: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#17: ffffffff8cfab760 (rcu_read_lock){....}-{1:2}, at: ip6_finish_output2+0x3ba/0x1830 net/ipv6/ip6_output.c:122
#18: ffffffff8cfab700 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#18: ffffffff8cfab700 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:799 [inline]
#18: ffffffff8cfab700 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x244/0x3d60 net/core/dev.c:4274
stack backtrace:
CPU: 1 PID: 28253 Comm: syz-executor.0 Not tainted 6.7.0-rc7-syzkaller-00049-g453f5db0619e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
check_noncircular+0x317/0x400 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2433/0x3b20 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
__dev_xmit_skb net/core/dev.c:3805 [inline]
__dev_queue_xmit+0x2e8e/0x3d60 net/core/dev.c:4315
dev_queue_xmit include/linux/netdevice.h:3134 [inline]
neigh_resolve_output net/core/neighbour.c:1563 [inline]
neigh_resolve_output+0x58c/0x900 net/core/neighbour.c:1543
neigh_output include/net/neighbour.h:542 [inline]
ip6_finish_output2+0x679/0x1830 net/ipv6/ip6_output.c:137
__ip6_finish_output net/ipv6/ip6_output.c:211 [inline]
ip6_finish_output+0x3c7/0xf80 net/ipv6/ip6_output.c:222
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1e2/0x530 net/ipv6/ip6_output.c:243
dst_output include/net/dst.h:451 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
ndisc_send_skb+0xa13/0x18f0 net/ipv6/ndisc.c:509
ndisc_send_ns+0xc7/0x140 net/ipv6/ndisc.c:667
ndisc_solicit+0x2f7/0x510 net/ipv6/ndisc.c:759
neigh_probe+0xc2/0x110 net/core/neighbour.c:1075
__neigh_event_send+0xa50/0x1320 net/core/neighbour.c:1242
neigh_event_send_probe include/net/neighbour.h:466 [inline]
neigh_event_send include/net/neighbour.h:472 [inline]
neigh_event_send include/net/neighbour.h:470 [inline]
neigh_resolve_output+0x5b9/0x900 net/core/neighbour.c:1547
neigh_output include/net/neighbour.h:542 [inline]
ip6_finish_output2+0x679/0x1830 net/ipv6/ip6_output.c:137
__ip6_finish_output net/ipv6/ip6_output.c:211 [inline]
ip6_finish_output+0x3c7/0xf80 net/ipv6/ip6_output.c:222
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1e2/0x530 net/ipv6/ip6_output.c:243
dst_output include/net/dst.h:451 [inline]
ip6_local_out+0xaf/0x1a0 net/ipv6/output_core.c:155
ip6_send_skb+0xcd/0x2d0 net/ipv6/ip6_output.c:1952
ip6_push_pending_frames+0xe0/0x100 net/ipv6/ip6_output.c:1972
icmpv6_push_pending_frames+0x2da/0x470 net/ipv6/icmp.c:307
icmp6_send+0x1d9c/0x2b00 net/ipv6/icmp.c:624
__icmpv6_send include/linux/icmpv6.h:28 [inline]
icmpv6_send include/linux/icmpv6.h:49 [inline]
ip6_link_failure+0x31/0x5a0 net/ipv6/route.c:2787
dst_link_failure include/net/dst.h:430 [inline]
ip_tunnel_xmit+0x2d87/0x33c0 net/ipv4/ip_tunnel.c:837
erspan_xmit+0x52b/0x1c00 net/ipv4/ip_gre.c:720
__netdev_start_xmit include/linux/netdevice.h:4940 [inline]
netdev_start_xmit include/linux/netdevice.h:4954 [inline]
xmit_one net/core/dev.c:3548 [inline]
dev_hard_start_xmit+0x13d/0x6d0 net/core/dev.c:3564
sch_direct_xmit+0x1ac/0xc20 net/sched/sch_generic.c:342
qdisc_restart net/sched/sch_generic.c:407 [inline]
__qdisc_run+0x54e/0x1a50 net/sched/sch_generic.c:415
__dev_xmit_skb net/core/dev.c:3838 [inline]
__dev_queue_xmit+0x24d8/0x3d60 net/core/dev.c:4315
dev_queue_xmit include/linux/netdevice.h:3134 [inline]
br_dev_queue_push_xmit+0x26e/0x7b0 net/bridge/br_forward.c:53
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
br_forward_finish+0xf5/0x120 net/bridge/br_forward.c:66
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
__br_forward+0x1e5/0x5b0 net/bridge/br_forward.c:115
deliver_clone+0x5b/0xa0 net/bridge/br_forward.c:131
maybe_deliver+0x316/0x3e0 net/bridge/br_forward.c:190
br_flood+0x17e/0x5c0 net/bridge/br_forward.c:236
br_dev_xmit+0x13f4/0x18a0 net/bridge/br_device.c:104
__netdev_start_xmit include/linux/netdevice.h:4940 [inline]
netdev_start_xmit include/linux/netdevice.h:4954 [inline]
xmit_one net/core/dev.c:3548 [inline]
dev_hard_start_xmit+0x13d/0x6d0 net/core/dev.c:3564
__dev_queue_xmit+0x7c1/0x3d60 net/core/dev.c:4349
dev_queue_xmit include/linux/netdevice.h:3134 [inline]
neigh_resolve_output net/core/neighbour.c:1563 [inline]
neigh_resolve_output+0x58c/0x900 net/core/neighbour.c:1543
__neigh_update+0xb57/0x2b80 net/core/neighbour.c:1461
ndisc_update net/ipv6/ndisc.c:782 [inline]
ndisc_recv_na+0xac2/0x1140 net/ipv6/ndisc.c:1109
ndisc_rcv+0x505/0x5f0 net/ipv6/ndisc.c:1848
icmpv6_rcv+0x1470/0x19c0 net/ipv6/icmp.c:979
ip6_protocol_deliver_rcu+0x170/0x13e0 net/ipv6/ip6_input.c:438
ip6_input_finish+0x14f/0x2f0 net/ipv6/ip6_input.c:483
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip6_input+0xa1/0xc0 net/ipv6/ip6_input.c:492
dst_input include/net/dst.h:461 [inline]
ip6_rcv_finish+0x196/0x2c0 net/ipv6/ip6_input.c:79
ip_sabotage_in+0x224/0x2a0 net/bridge/br_netfilter_hooks.c:882
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xbb/0x1f0 net/netfilter/core.c:626
nf_hook.constprop.0+0x42f/0x750 include/linux/netfilter.h:269
NF_HOOK include/linux/netfilter.h:312 [inline]
ipv6_rcv+0xa4/0x380 net/ipv6/ip6_input.c:310
__netif_receive_skb_one_core+0x115/0x180 net/core/dev.c:5532
__netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5646
netif_receive_skb_internal net/core/dev.c:5732 [inline]
netif_receive_skb+0x133/0x700 net/core/dev.c:5791
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
br_pass_frame_up+0x2fa/0x420 net/bridge/br_input.c:68
br_handle_frame_finish+0xdde/0x1dc0 net/bridge/br_input.c:216
br_nf_hook_thresh+0x2ff/0x410 net/bridge/br_netfilter_hooks.c:1044
br_nf_pre_routing_finish_ipv6+0x683/0xf20 net/bridge/br_netfilter_ipv6.c:148
NF_HOOK include/linux/netfilter.h:314 [inline]
br_nf_pre_routing_ipv6+0x3ce/0x8c0 net/bridge/br_netfilter_ipv6.c:178
br_nf_pre_routing+0x85e/0x15a0 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:272 [inline]
br_handle_frame+0x9df/0x1440 net/bridge/br_input.c:417
__netif_receive_skb_core.constprop.0+0x9f7/0x3f50 net/core/dev.c:5426
__netif_receive_skb_one_core+0xaf/0x180 net/core/dev.c:5530
__netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5646
process_backlog+0x101/0x6b0 net/core/dev.c:5974
__napi_poll.constprop.0+0xb4/0x540 net/core/dev.c:6536
napi_poll net/core/dev.c:6605 [inline]
net_rx_action+0x956/0xe90 net/core/dev.c:6738
__do_softirq+0x21a/0x8de kernel/softirq.c:553
do_softirq kernel/softirq.c:454 [inline]
do_softirq+0xaa/0xe0 kernel/softirq.c:441
__local_bh_enable_ip+0xfc/0x120 kernel/softirq.c:381
local_bh_enable include/linux/bottom_half.h:33 [inline]
__neigh_event_send+0x31c/0x1320 net/core/neighbour.c:1245
neigh_event_send_probe include/net/neighbour.h:466 [inline]
neigh_event_send include/net/neighbour.h:472 [inline]
neigh_event_send include/net/neighbour.h:470 [inline]
neigh_resolve_output+0x5b9/0x900 net/core/neighbour.c:1547
neigh_output include/net/neighbour.h:542 [inline]
ip6_finish_output2+0x679/0x1830 net/ipv6/ip6_output.c:137
__ip6_finish_output net/ipv6/ip6_output.c:211 [inline]
ip6_finish_output+0x3c7/0xf80 net/ipv6/ip6_output.c:222
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1e2/0x530 net/ipv6/ip6_output.c:243
dst_output include/net/dst.h:451 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip6_xmit+0x1234/0x1cc0 net/ipv6/ip6_output.c:358
inet6_csk_xmit+0x3ce/0x740 net/ipv6/inet6_connection_sock.c:135
__tcp_transmit_skb+0x1aa5/0x3d10 net/ipv4/tcp_output.c:1462
tcp_transmit_skb net/ipv4/tcp_output.c:1480 [inline]
tcp_connect+0x3593/0x5280 net/ipv4/tcp_output.c:4100
tcp_v6_connect+0x1543/0x20c0 net/ipv6/tcp_ipv6.c:332
mptcp_connect+0x349/0x960 net/mptcp/protocol.c:3711
__inet_stream_connect+0x3c5/0x1020 net/ipv4/af_inet.c:675
inet_stream_connect+0x57/0xa0 net/ipv4/af_inet.c:746
__sys_connect_file+0x15b/0x1a0 net/socket.c:2046
__sys_connect+0x145/0x170 net/socket.c:2063
__do_sys_connect net/socket.c:2073 [inline]
__se_sys_connect net/socket.c:2070 [inline]
__x64_sys_connect+0x72/0xb0 net/socket.c:2070
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f6c1487cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6c1566b0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f6c1499c050 RCX: 00007f6c1487cce9
RDX: 000000000000001c RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007f6c148c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f6c1499c050 R15: 00007f6c14abfa48