__do_sys_unshare kernel/fork.c:3499 [inline] __se_sys_unshare kernel/fork.c:3497 [inline] __arm64_sys_unshare+0x3c/0x50 kernel/fork.c:3497 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 555 at lib/ref_tracker.c:179 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] WARNING: CPU: 0 PID: 555 at lib/ref_tracker.c:179 ref_tracker_dir_exit+0x390/0x4b4 lib/ref_tracker.c:178 Modules linked in: CPU: 0 PID: 555 Comm: kworker/u4:8 Tainted: G B 6.8.0-rc4-syzkaller-g905b00721763 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: netns cleanup_net pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ref_tracker_dir_exit+0x390/0x4b4 include/linux/spinlock.h:406 lr : spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] lr : ref_tracker_dir_exit+0x390/0x4b4 lib/ref_tracker.c:178 sp : ffff800097e17980 x29: ffff800097e17a00 x28: ffff00011eb881e0 x27: 1ffff00012fc2f34 x26: dfff800000000000 x25: ffff00011eb88230 x24: dead000000000100 x23: ffff00011eb88230 x22: ffff00011eb881e0 x21: ffff00011eb88230 x20: ffff00011eb88230 x19: 1fffe000191c6d20 x18: 1fffe00036800396 x17: ffff80008ec8d000 x16: ffff80008ad61e34 x15: 0000000000000001 x14: 1fffe00036802be8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800097e0ffff x10: 0000000000ff0100 x9 : 0000000000000001 x8 : 0000000000000008 x7 : 1fffe00036800397 x6 : ffff8000802963d0 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000c6fada00 x1 : 0000000000000000 x0 : ffff800080296470 Call trace: spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] ref_tracker_dir_exit+0x390/0x4b4 lib/ref_tracker.c:178 net_free+0x80/0xf4 net/core/net_namespace.c:452 cleanup_net+0x82c/0x8d0 net/core/net_namespace.c:639 process_one_work+0x694/0x1204 kernel/workqueue.c:2633 process_scheduled_works kernel/workqueue.c:2706 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2787 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 irq event stamp: 29454 hardirqs last enabled at (29453): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (29453): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202 hardirqs last disabled at (29454): [] __schedule+0x2bc/0x24b4 kernel/sched/core.c:6625 softirqs last enabled at (22484): [] softirq_handle_end kernel/softirq.c:399 [inline] softirqs last enabled at (22484): [] __do_softirq+0xac8/0xce4 kernel/softirq.c:582 softirqs last disabled at (21157): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 ---[ end trace 0000000000000000 ]--- netdevsim netdevsim4 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim4 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim4 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim4 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 hsr_slave_0: left promiscuous mode hsr_slave_1: left promiscuous mode batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 bridge_slave_1: left allmulticast mode bridge_slave_1: left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state bridge_slave_0: left allmulticast mode bridge_slave_0: left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state veth1_macvtap: left promiscuous mode veth0_macvtap: left promiscuous mode veth1_vlan: left promiscuous mode veth0_vlan: left promiscuous mode team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): (slave bond_slave_1): Releasing backup interface bond0 (unregistering): (slave bond_slave_0): Releasing backup interface bond0 (unregistering): Released all slaves