batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 INFO: task kworker/u4:7:10445 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:7 D25976 10445 2 0x80000000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078 tc_action_net_exit include/net/act_api.h:135 [inline] tunnel_key_exit_net+0x22/0x360 net/sched/act_tunnel_key.c:591 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task syz-executor.5:18089 blocked for more than 140 seconds. Not tainted 4.19.208-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28592 18089 8148 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078 gtp_net_exit+0x1ba/0x380 drivers/net/gtp.c:1360 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153 setup_net+0x3d1/0x720 net/core/net_namespace.c:333 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:206 ksys_unshare+0x36c/0x9a0 kernel/fork.c:2542 __do_sys_unshare kernel/fork.c:2610 [inline] __se_sys_unshare kernel/fork.c:2608 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:2608 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fe88eae5709 Code: Bad RIP value. RSP: 002b:00007fe88c03b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fe88ebea020 RCX: 00007fe88eae5709 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000048020200 RBP: 00007fe88eb3fcb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef52f3b5f R14: 00007fe88c03b300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000acb8e663 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7824: 3 locks held by kworker/1:3/9236: #0: 00000000fc197d81 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000012cc6b46 ((addr_chk_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000e7088348 (rtnl_mutex){+.+.}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4476 3 locks held by kworker/0:3/9293: #0: 0000000057414fdf ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000070d2bc0d (deferred_process_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000e7088348 (rtnl_mutex){+.+.}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:150 3 locks held by kworker/0:4/9372: #0: 0000000057414fdf ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000063effc0a ((linkwatch_work).work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000e7088348 (rtnl_mutex){+.+.}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:236 4 locks held by kworker/u4:7/10445: #0: 00000000401218d1 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000048534a71 (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 000000006c2b934b (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:521 #3: 00000000e7088348 (rtnl_mutex){+.+.}, at: tc_action_net_exit include/net/act_api.h:135 [inline] #3: 00000000e7088348 (rtnl_mutex){+.+.}, at: tunnel_key_exit_net+0x22/0x360 net/sched/act_tunnel_key.c:591 2 locks held by syz-executor.5/18089: #0: 000000006c2b934b (pernet_ops_rwsem){++++}, at: copy_net_ns+0x1d8/0x340 net/core/net_namespace.c:435 #1: 00000000e7088348 (rtnl_mutex){+.+.}, at: gtp_net_exit+0x1ba/0x380 drivers/net/gtp.c:1360 2 locks held by syz-executor.4/18087: #0: 00000000e7088348 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000e7088348 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779 #1: 0000000008e5e083 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #1: 0000000008e5e083 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.208-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 18087 Comm: syz-executor.4 Not tainted 4.19.208-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_acquire+0x1b/0x3c0 kernel/locking/lockdep.c:3897 Code: e3 fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 45 89 c7 41 56 41 89 ce 41 55 41 89 d5 41 54 <41> 89 f4 55 48 89 fd 53 65 48 8b 1c 25 c0 df 01 00 48 8d bb 84 08 RSP: 0018:ffff88803c4c6b48 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000010000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff89e5b898 RBP: ffffffff89e5b880 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff89e5b880 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 00007f8c871cd700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe3ec7a4008 CR3: 00000000927fc000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] nf_conntrack_lock net/netfilter/nf_conntrack_core.c:91 [inline] get_next_corpse net/netfilter/nf_conntrack_core.c:1896 [inline] nf_ct_iterate_cleanup+0x1dc/0x520 net/netfilter/nf_conntrack_core.c:1930 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2015 [inline] nf_ct_iterate_cleanup_net+0x113/0x170 net/netfilter/nf_conntrack_core.c:2000 masq_device_event+0xd6/0x110 net/ipv4/netfilter/nf_nat_masquerade_ipv4.c:100 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93 call_netdevice_notifiers net/core/dev.c:1762 [inline] __dev_notify_flags+0x1da/0x2b0 net/core/dev.c:7719 dev_change_flags+0xf0/0x140 net/core/dev.c:7753 do_setlink+0x14f1/0x3540 net/core/rtnetlink.c:2449 rtnl_group_changelink net/core/rtnetlink.c:2925 [inline] rtnl_newlink+0xbc9/0x15c0 net/core/rtnetlink.c:3083 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2457 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1911 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8c89c56709 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8c871cd188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8c89d5af60 RCX: 00007f8c89c56709 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007f8c89cb0cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdd22429ff R14: 00007f8c871cd300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: ff 66 66 jmpq *0x66(%rsi) 3: 2e 0f 1f 84 00 00 00 nopl %cs:0x0(%rax,%rax,1) a: 00 00 c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 13: fc ff df 16: 41 57 push %r15 18: 45 89 c7 mov %r8d,%r15d 1b: 41 56 push %r14 1d: 41 89 ce mov %ecx,%r14d 20: 41 55 push %r13 22: 41 89 d5 mov %edx,%r13d 25: 41 54 push %r12 * 27: 41 89 f4 mov %esi,%r12d <-- trapping instruction 2a: 55 push %rbp 2b: 48 89 fd mov %rdi,%rbp 2e: 53 push %rbx 2f: 65 48 8b 1c 25 c0 df mov %gs:0x1dfc0,%rbx 36: 01 00 38: 48 rex.W 39: 8d .byte 0x8d 3a: bb .byte 0xbb 3b: 84 08 test %cl,(%rax)