possible deadlock in netlink_set

Title	Replies (including bot)	Last reply
[PATCH net] netlink: fix potential deadlock in netlink_set_err()	12 (12)	2023/06/23 02:40
[syzbot] [net?] possible deadlock in netlink_set_err	4 (5)	2023/06/21 20:27

RAX: ffffffffffffffda RBX: 00007f887bbabf80 RCX: 00007f887ba8c389 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 00007f887c7651d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc4dd1155f R14: 00007f887c765300 R15: 0000000000022000 </TASK> ======================================================== WARNING: possible irq lock inversion dependency detected 6.4.0-rc6-syzkaller-00240-g4e9f0ec38852 #0 Not tainted -------------------------------------------------------- syz-executor.2/23011 just changed the state of lock: ffffffff8e1a7a58 (nl_table_lock){.+.?}-{2:2}, at: netlink_set_err+0x2e/0x3a0 net/netlink/af_netlink.c:1612 but this lock was taken by another, SOFTIRQ-safe lock in the past: (&local->queue_stop_reason_lock){..-.}-{2:2} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(nl_table_lock); local_irq_disable(); lock(&local->queue_stop_reason_lock); lock(nl_table_lock); <Interrupt> lock(&local->queue_stop_reason_lock); *** DEADLOCK *** 1 lock held by syz-executor.2/23011: #0: ffffffff8e115ba8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:78 [inline] #0: ffffffff8e115ba8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3e8/0xd50 net/core/rtnetlink.c:6414 the shortest dependencies between 2nd lock and 1st lock: -> (&local->queue_stop_reason_lock){..-.}-{2:2} { IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162 ieee80211_tx_dequeue+0x1f2/0x1d50 net/mac80211/tx.c:3803 wake_tx_push_queue net/mac80211/util.c:301 [inline] ieee80211_handle_wake_tx_queue+0x197/0x260 net/mac80211/util.c:322 drv_wake_tx_queue net/mac80211/driver-ops.h:1241 [inline] schedule_and_wake_txq net/mac80211/driver-ops.h:1248 [inline] ieee80211_queue_skb+0x1281/0x2040 net/mac80211/tx.c:1680 ieee80211_tx+0x2d2/0x420 net/mac80211/tx.c:1982 ieee80211_xmit+0x30e/0x3e0 net/mac80211/tx.c:2078 __ieee80211_subif_start_xmit+0xa62/0x1390 net/mac80211/tx.c:4312 ieee80211_subif_start_xmit+0xf0/0x1370 net/mac80211/tx.c:4504 __netdev_start_xmit include/linux/netdevice.h:4918 [inline] netdev_start_xmit include/linux/netdevice.h:4932 [inline] xmit_one net/core/dev.c:3578 [inline] dev_hard_start_xmit+0x187/0x700 net/core/dev.c:3594 __dev_queue_xmit+0x2be2/0x3b10 net/core/dev.c:4244 dev_queue_xmit include/linux/netdevice.h:3088 [inline] neigh_hh_output include/net/neighbour.h:528 [inline] neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0xfbd/0x1560 net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x69a/0x1170 net/ipv6/ip6_output.c:206 NF_HOOK_COND include/linux/netfilter.h:292 [inline] ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:458 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] ndisc_send_skb+0xa63/0x1850 net/ipv6/ndisc.c:508 ndisc_send_rs+0x132/0x6f0 net/ipv6/ndisc.c:718 addrconf_rs_timer+0x3f1/0x870 net/ipv6/addrconf.c:3936 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 __sanitizer_cov_trace_pc+0x60/0x70 kernel/kcov.c:223 is_cow_mapping include/linux/mm.h:1543 [inline] copy_present_pte mm/memory.c:957 [inline] copy_pte_range mm/memory.c:1064 [inline] copy_pmd_range mm/memory.c:1150 [inline] copy_pud_range mm/memory.c:1187 [inline] copy_p4d_range mm/memory.c:1211 [inline] copy_page_range+0xfc4/0x3830 mm/memory.c:1309 dup_mmap+0x10bc/0x19d0 kernel/fork.c:761 dup_mm kernel/fork.c:1692 [inline] copy_mm kernel/fork.c:1741 [inline] copy_process+0x6663/0x75c0 kernel/fork.c:2507 kernel_clone+0xeb/0x890 kernel/fork.c:2915 __do_sys_clone+0xba/0x100 kernel/fork.c:3058 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162 ieee80211_tx_dequeue+0x1f2/0x1d50 net/mac80211/tx.c:3803 wake_tx_push_queue net/mac80211/util.c:301 [inline] ieee80211_handle_wake_tx_queue+0x197/0x260 net/mac80211/util.c:322 drv_wake_tx_queue net/mac80211/driver-ops.h:1241 [inline] schedule_and_wake_txq net/mac80211/driver-ops.h:1248 [inline] ieee80211_queue_skb+0x1281/0x2040 net/mac80211/tx.c:1680 ieee80211_tx+0x2d2/0x420 net/mac80211/tx.c:1982 ieee80211_xmit+0x30e/0x3e0 net/mac80211/tx.c:2078 __ieee80211_subif_start_xmit+0xa62/0x1390 net/mac80211/tx.c:4312 ieee80211_subif_start_xmit+0xf0/0x1370 net/mac80211/tx.c:4504 __netdev_start_xmit include/linux/netdevice.h:4918 [inline] netdev_start_xmit include/linux/netdevice.h:4932 [inline] xmit_one net/core/dev.c:3578 [inline] dev_hard_start_xmit+0x187/0x700 net/core/dev.c:3594 __dev_queue_xmit+0x2be2/0x3b10 net/core/dev.c:4244 dev_queue_xmit include/linux/netdevice.h:3088 [inline] neigh_resolve_output net/core/neighbour.c:1552 [inline] neigh_resolve_output+0x51b/0x870 net/core/neighbour.c:1532 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0x55a/0x1560 net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x69a/0x1170 net/ipv6/ip6_output.c:206 NF_HOOK_COND include/linux/netfilter.h:292 [inline] ip6_output+0x1f1/0x540 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:458 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] NF_HOOK include/linux/netfilter.h:297 [inline] mld_sendpack+0xa09/0xed0 net/ipv6/mcast.c:1820 mld_send_cr net/ipv6/mcast.c:2121 [inline] mld_ifc_work+0x73c/0xe20 net/ipv6/mcast.c:2653 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 } ... key at: [<ffffffff921be140>] __key.19+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 netlink_lock_table net/netlink/af_netlink.c:472 [inline] netlink_broadcast+0x74/0xd90 net/netlink/af_netlink.c:1533 nlmsg_multicast include/net/netlink.h:1083 [inline] genlmsg_multicast_netns include/net/genetlink.h:392 [inline] nl80211_frame_tx_status+0x9dc/0xc20 net/wireless/nl80211.c:18807 ieee80211_report_ack_skb net/mac80211/status.c:680 [inline] ieee80211_report_used_skb+0x107f/0x1a10 net/mac80211/status.c:763 ieee80211_free_txskb+0x24/0x40 net/mac80211/status.c:1260 ieee80211_do_stop+0xc71/0x1f50 net/mac80211/iface.c:640 ieee80211_runtime_change_iftype net/mac80211/iface.c:1866 [inline] ieee80211_if_change_type+0x416/0x8b0 net/mac80211/iface.c:1904 ieee80211_change_iface+0x5b/0x440 net/mac80211/cfg.c:217 rdev_change_virtual_intf net/wireless/rdev-ops.h:74 [inline] cfg80211_change_iface+0x5c1/0xe00 net/wireless/util.c:1163 nl80211_set_interface+0x695/0x960 net/wireless/nl80211.c:4217 genl_family_rcv_msg_doit.isra.0+0x1e6/0x2d0 net/netlink/genetlink.c:968 genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline] genl_rcv_msg+0x4ff/0x7e0 net/netlink/genetlink.c:1065 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> (nl_table_lock){.+.?}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 netlink_set_err+0x2e/0x3a0 net/netlink/af_netlink.c:1612 rtnl_set_sk_err net/core/rtnetlink.c:779 [inline] rtmsg_ifinfo_build_skb+0x226/0x280 net/core/rtnetlink.c:4029 rtmsg_ifinfo_event net/core/rtnetlink.c:4051 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4041 [inline] rtmsg_ifinfo+0x9f/0x1a0 net/core/rtnetlink.c:4060 netdev_state_change net/core/dev.c:1319 [inline] netdev_state_change+0x11e/0x130 net/core/dev.c:1310 do_setlink+0x2f6a/0x3b70 net/core/rtnetlink.c:3102 rtnl_group_changelink net/core/rtnetlink.c:3402 [inline] __rtnl_newlink+0xb90/0x1840 net/core/rtnetlink.c:3658 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3695 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6417 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd IN-SOFTIRQ-R at: lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x49/0x90 kernel/locking/spinlock.c:236 netlink_lock_table net/netlink/af_netlink.c:472 [inline] netlink_broadcast+0x74/0xd90 net/netlink/af_netlink.c:1533 nlmsg_multicast include/net/netlink.h:1083 [inline] nlmsg_notify+0x93/0x280 net/netlink/af_netlink.c:2589 __neigh_notify+0xdc/0x160 net/core/neighbour.c:3513 neigh_update_notify net/core/neighbour.c:2655 [inline] __neigh_update+0x109a/0x2bb0 net/core/neighbour.c:1469 arp_process+0x863/0x21b0 net/ipv4/arp.c:932 NF_HOOK include/linux/netfilter.h:303 [inline] NF_HOOK include/linux/netfilter.h:297 [inline] arp_rcv net/ipv4/arp.c:988 [inline] arp_rcv+0x3d2/0x540 net/ipv4/arp.c:963 __netif_receive_skb_list_ptype net/core/dev.c:5541 [inline] __netif_receive_skb_list_ptype net/core/dev.c:5525 [inline] __netif_receive_skb_list_core+0x6c6/0x8f0 net/core/dev.c:5584 __netif_receive_skb_list net/core/dev.c:5636 [inline] netif_receive_skb_list_internal+0x75f/0xdc0 net/core/dev.c:5727 gro_normal_list include/net/gro.h:433 [inline] gro_normal_list include/net/gro.h:429 [inline] napi_complete_done+0x243/0x9a0 net/core/dev.c:6067 virtqueue_napi_complete drivers/net/virtio_net.c:408 [inline] virtnet_poll+0xe2b/0x14b0 drivers/net/virtio_net.c:1858 __napi_poll+0xb7/0x6f0 net/core/dev.c:6498 napi_poll net/core/dev.c:6565 [inline] net_rx_action+0x8a9/0xcb0 net/core/dev.c:6698 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 common_interrupt+0xad/0xd0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636 rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline] cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline] csd_lock_wait kernel/smp.c:285 [inline] smp_call_function_many_cond+0x67f/0x15a0 kernel/smp.c:828 on_each_cpu_cond_mask+0x5a/0xa0 kernel/smp.c:996 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1770 [inline] text_poke_bp_batch+0x634/0x770 arch/x86/kernel/alternative.c:2053 text_poke_flush arch/x86/kernel/alternative.c:2161 [inline] text_poke_flush arch/x86/kernel/alternative.c:2158 [inline] text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:2168 arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x32f/0x410 kernel/jump_label.c:829 static_key_disable_cpuslocked+0x156/0x1b0 kernel/jump_label.c:235 static_key_disable+0x1a/0x20 kernel/jump_label.c:243 once_deferred+0x68/0xc0 lib/once.c:20 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 netlink_set_err+0x2e/0x3a0 net/netlink/af_netlink.c:1612 rtnl_set_sk_err net/core/rtnetlink.c:779 [inline] rtmsg_ifinfo_build_skb+0x226/0x280 net/core/rtnetlink.c:4029 rtmsg_ifinfo_event net/core/rtnetlink.c:4051 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4041 [inline] rtmsg_ifinfo+0x9f/0x1a0 net/core/rtnetlink.c:4060 netdev_state_change net/core/dev.c:1319 [inline] netdev_state_change+0x11e/0x130 net/core/dev.c:1310 do_setlink+0x2f6a/0x3b70 net/core/rtnetlink.c:3102 rtnl_group_changelink net/core/rtnetlink.c:3402 [inline] __rtnl_newlink+0xb90/0x1840 net/core/rtnetlink.c:3658 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3695 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6417 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 netlink_table_grab net/netlink/af_netlink.c:438 [inline] netlink_add_usersock_entry net/netlink/af_netlink.c:2851 [inline] netlink_proto_init+0x158/0x3d0 net/netlink/af_netlink.c:2942 do_one_initcall+0x102/0x540 init/main.c:1246 do_initcall_level init/main.c:1319 [inline] do_initcalls init/main.c:1335 [inline] do_basic_setup init/main.c:1354 [inline] kernel_init_freeable+0x64e/0xba0 init/main.c:1571 kernel_init+0x1e/0x2c0 init/main.c:1462 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 netlink_lock_table net/netlink/af_netlink.c:472 [inline] netlink_broadcast+0x74/0xd90 net/netlink/af_netlink.c:1533 nlmsg_multicast include/net/netlink.h:1083 [inline] genlmsg_multicast_netns include/net/genetlink.h:392 [inline] genl_ctrl_event.isra.0+0x3be/0xa50 net/netlink/genetlink.c:1360 genl_register_family.part.0+0x72b/0xf20 net/netlink/genetlink.c:675 genl_register_family+0x35/0x50 net/netlink/genetlink.c:635 thermal_init+0x16/0x370 drivers/thermal/thermal_core.c:1533 do_one_initcall+0x102/0x540 init/main.c:1246 do_initcall_level init/main.c:1319 [inline] do_initcalls init/main.c:1335 [inline] do_basic_setup init/main.c:1354 [inline] kernel_init_freeable+0x64e/0xba0 init/main.c:1571 kernel_init+0x1e/0x2c0 init/main.c:1462 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 } ... key at: [<ffffffff8e1a7a58>] nl_table_lock+0x18/0x60 ... acquired at: mark_lock kernel/locking/lockdep.c:4620 [inline] mark_usage kernel/locking/lockdep.c:4569 [inline] __lock_acquire+0x8ef/0x5f30 kernel/locking/lockdep.c:5042 lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 netlink_set_err+0x2e/0x3a0 net/netlink/af_netlink.c:1612 rtnl_set_sk_err net/core/rtnetlink.c:779 [inline] rtmsg_ifinfo_build_skb+0x226/0x280 net/core/rtnetlink.c:4029 rtmsg_ifinfo_event net/core/rtnetlink.c:4051 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4041 [inline] rtmsg_ifinfo+0x9f/0x1a0 net/core/rtnetlink.c:4060 netdev_state_change net/core/dev.c:1319 [inline] netdev_state_change+0x11e/0x130 net/core/dev.c:1310 do_setlink+0x2f6a/0x3b70 net/core/rtnetlink.c:3102 rtnl_group_changelink net/core/rtnetlink.c:3402 [inline] __rtnl_newlink+0xb90/0x1840 net/core/rtnetlink.c:3658 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3695 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6417 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd stack backtrace: CPU: 0 PID: 23011 Comm: syz-executor.2 Not tainted 6.4.0-rc6-syzkaller-00240-g4e9f0ec38852 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_irq_inversion_bug.part.0+0x3d9/0x580 kernel/locking/lockdep.c:4058 print_irq_inversion_bug kernel/locking/lockdep.c:4011 [inline] check_usage_backwards kernel/locking/lockdep.c:4124 [inline] mark_lock_irq kernel/locking/lockdep.c:4214 [inline] mark_lock.part.0+0x822/0x1970 kernel/locking/lockdep.c:4656 mark_lock kernel/locking/lockdep.c:4620 [inline] mark_usage kernel/locking/lockdep.c:4569 [inline] __lock_acquire+0x8ef/0x5f30 kernel/locking/lockdep.c:5042 lock_acquire kernel/locking/lockdep.c:5705 [inline] lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 netlink_set_err+0x2e/0x3a0 net/netlink/af_netlink.c:1612 rtnl_set_sk_err net/core/rtnetlink.c:779 [inline] rtmsg_ifinfo_build_skb+0x226/0x280 net/core/rtnetlink.c:4029 rtmsg_ifinfo_event net/core/rtnetlink.c:4051 [inline] rtmsg_ifinfo_event net/core/rtnetlink.c:4041 [inline] rtmsg_ifinfo+0x9f/0x1a0 net/core/rtnetlink.c:4060 netdev_state_change net/core/dev.c:1319 [inline] netdev_state_change+0x11e/0x130 net/core/dev.c:1310 do_setlink+0x2f6a/0x3b70 net/core/rtnetlink.c:3102 rtnl_group_changelink net/core/rtnetlink.c:3402 [inline] __rtnl_newlink+0xb90/0x1840 net/core/rtnetlink.c:3658 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3695 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6417 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f887ba8c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f887c765168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f887bbabf80 RCX: 00007f887ba8c389 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 00007f887c7651d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc4dd1155f R14: 00007f887c765300 R15: 0000000000022000 </TASK> IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready