INFO: task syz.0.3098:17258 blocked for more than 143 seconds. Not tainted 6.12.0-rc7-syzkaller-01770-gdd7207838d38 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.3098 state:D stack:22928 pid:17258 tgid:17257 ppid:5843 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x184f/0x4c30 kernel/sched/core.c:6693 __schedule_loop kernel/sched/core.c:6770 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6785 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2591 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x355/0x620 kernel/sched/completion.c:148 disable_device+0x1c7/0x360 drivers/infiniband/core/device.c:1295 __ib_unregister_device+0x2ac/0x3d0 drivers/infiniband/core/device.c:1518 ib_unregister_device_and_put+0xb9/0xf0 drivers/infiniband/core/device.c:1583 nldev_dellink+0x2c6/0x310 drivers/infiniband/core/nldev.c:1825 rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x6dd/0x9e0 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1886 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2609 ___sys_sendmsg net/socket.c:2663 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2692 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f83afd7e819 RSP: 002b:00007f83b0bc7038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f83aff35fa0 RCX: 00007f83afd7e819 RDX: 0000000000008000 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 00007f83afdf175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f83aff35fa0 R15: 00007ffde8be6a08 INFO: task syz.3.3113:17319 blocked for more than 144 seconds. Not tainted 6.12.0-rc7-syzkaller-01770-gdd7207838d38 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.3113 state:D stack:23448 pid:17319 tgid:17317 ppid:16220 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x184f/0x4c30 kernel/sched/core.c:6693 __schedule_loop kernel/sched/core.c:6770 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6785 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6842 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 rdma_dev_exit_net+0x21e/0x350 drivers/infiniband/core/device.c:1151 ops_exit_list net/core/net_namespace.c:172 [inline] setup_net+0x794/0x9e0 net/core/net_namespace.c:394 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:500 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x57d/0xa70 kernel/fork.c:3313 __do_sys_unshare kernel/fork.c:3384 [inline] __se_sys_unshare kernel/fork.c:3382 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3382 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc42677e819 RSP: 002b:00007fc4275d0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fc426936080 RCX: 00007fc42677e819 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000062040200 RBP: 00007fc4267f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fc426936080 R15: 00007ffe7429b908 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720 4 locks held by kworker/u8:7/1141: #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90004097d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90004097d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:586 #3: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by getty/5601: #0: ffff8880361220a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900032e32f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 3 locks held by kworker/0:3/5844: #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90004087d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90004087d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffff88809b8e8240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1490 3 locks held by kworker/u8:13/6226: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc9000b25fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000b25fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcd5448 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 3 locks held by kworker/u8:23/9213: 3 locks held by kworker/u8:36/14747: #0: ffff88814c988148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88814c988148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc9001af17d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9001af17d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcd5448 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196 2 locks held by syz.0.3098/17258: #0: ffffffff9a7aa998 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:164 [inline] #0: ffffffff9a7aa998 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] #0: ffffffff9a7aa998 (&rdma_nl_types[idx].sem){.+.+}-{3:3}, at: rdma_nl_rcv+0x32d/0x9e0 drivers/infiniband/core/netlink.c:259 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: __ib_unregister_device+0x264/0x3d0 drivers/infiniband/core/device.c:1514 2 locks held by syz.3.3113/17319: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.1.3246/17726: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.2.3335/18069: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.5.3422/18375: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.6.3424/18397: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.9.3636/19184: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.0.3669/19323: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.7.3671/19328: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.7.3671/19330: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.3.3784/19840: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.3.3784/19851: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.1.3828/20008: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 2 locks held by syz.8.3860/20157: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 4 locks held by syz-executor/20233: #0: ffff888088a7cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline] #0: ffff888088a7cd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2698 #1: ffff888088a7c078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x5c8/0x11c0 net/bluetooth/hci_sync.c:5200 #2: ffffffff8fe43528 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2047 [inline] #2: ffffffff8fe43528 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2698 #3: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #3: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976 2 locks held by syz.5.3890/20303: #0: ffffffff8fcc8910 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:496 #1: ffff8880280a06b0 (&device->unregistration_lock){+.+.}-{3:3}, at: rdma_dev_change_netns+0x3a/0x2f0 drivers/infiniband/core/device.c:1666 3 locks held by syz-executor/20415: #0: ffffffff8fd3bfd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8fd3be88 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8fd3be88 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8fd3be88 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xec0 net/netlink/genetlink.c:1209 #2: ffffffff8fcd5448 (rtnl_mutex){+.+.}-{3:3}, at: wiphy_register+0x1a3f/0x27b0 net/wireless/core.c:1009 2 locks held by syz-executor/20544: #0: ffffffff8f46c2a0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8f46c2a0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8f46c2a0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:555 #1: ffffffff8fcd5448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffffffff8fcd5448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline] #1: ffffffff8fcd5448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_newlink+0xd04/0x24f0 net/core/rtnetlink.c:4000 2 locks held by syz.2.3957/20613: #0: ffffffff8fcd5448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fcd5448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_net_lock include/linux/rtnetlink.h:128 [inline] #0: ffffffff8fcd5448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_dellink+0x394/0x8d0 net/core/rtnetlink.c:3504 #1: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #1: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc7-syzkaller-01770-gdd7207838d38 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 20598 Comm: syz.9.3956 Not tainted 6.12.0-rc7-syzkaller-01770-gdd7207838d38 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:130 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x4c/0x290 mm/kasan/generic.c:189 Code: 00 00 48 89 fd 48 c1 ed 2f 81 fd fe ff 01 00 0f 86 43 02 00 00 48 89 fb 48 c1 eb 03 49 ba 00 00 00 00 00 fc ff df 4e 8d 1c 13 <49> ff c8 4d 89 c1 49 c1 e9 03 49 be 01 00 00 00 00 fc ff df 4f 8d RSP: 0018:ffffc90003f37550 EFLAGS: 00000806 RAX: 0000000000000001 RBX: 1ffffffff34d4eaf RCX: ffffffff8171c032 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff9a6a7578 RBP: 000000000001ffff R08: ffffffff9a6a757c R09: 1ffffffff285cb00 R10: dffffc0000000000 R11: fffffbfff34d4eaf R12: ffffffff9a6a7578 R13: 1ffff920007e6ebc R14: ffffc90003f375e0 R15: 1ffffffff34d4eb0 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d303ff8 CR3: 000000000e734000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1300 [inline] queued_spin_lock include/asm-generic/qspinlock.h:111 [inline] do_raw_spin_lock+0x142/0x370 kernel/locking/spinlock_debug.c:116 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0xe1/0x120 kernel/locking/spinlock.c:162 __debug_check_no_obj_freed lib/debugobjects.c:978 [inline] debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1019 free_pages_prepare mm/page_alloc.c:1134 [inline] free_unref_page+0x4d9/0x1140 mm/page_alloc.c:2657 vfree+0x186/0x2e0 mm/vmalloc.c:3361 kcov_put kernel/kcov.c:439 [inline] kcov_close+0x28/0x50 kernel/kcov.c:535 __fput+0x23f/0x880 fs/file_table.c:431 task_work_run+0x24f/0x310 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:939 do_group_exit+0x207/0x2c0 kernel/exit.c:1088 get_signal+0x16a3/0x1740 kernel/signal.c:2918 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f79b377e819 Code: Unable to access opcode bytes at 0x7f79b377e7ef. RSP: 002b:00007fffa88ee068 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f79b3937ba0 RCX: 00007f79b377e819 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f79b3937ba0 R08: 000000000001a5ac R09: 00007fffa88ee35f R10: 00007f79b3937ac0 R11: 0000000000000246 R12: 000000000007218e R13: 00007fffa88ee170 R14: 0000000000000032 R15: ffffffffffffffff IPVS: nq: UDP 224.0.0.2:0 - no destination available