INFO: task kworker/u4:9:21529 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:9 state:D stack:24944 pid:21529 ppid: 2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 cangw_pernet_exit+0xe/0x20 net/can/gw.c:1241 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:187 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:604 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task syz-executor.4:16182 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26784 pid:16182 ppid: 8483 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 ib_get_eth_speed+0xeb/0x5c0 drivers/infiniband/core/verbs.c:1818 siw_query_port+0x39/0x3e0 drivers/infiniband/sw/siw/siw_verbs.c:171 iw_query_port drivers/infiniband/core/device.c:2029 [inline] ib_query_port drivers/infiniband/core/device.c:2074 [inline] ib_query_port+0x3fc/0x9e0 drivers/infiniband/core/device.c:2066 add_port drivers/infiniband/core/sysfs.c:1064 [inline] ib_setup_port_attrs+0x1ee/0x14f0 drivers/infiniband/core/sysfs.c:1395 add_one_compat_dev+0x4ab/0x800 drivers/infiniband/core/device.c:954 rdma_dev_init_net+0x2dc/0x480 drivers/infiniband/core/device.c:1170 ops_init+0xaf/0x470 net/core/net_namespace.c:152 setup_net+0x2de/0x850 net/core/net_namespace.c:342 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x8e0 kernel/fork.c:2955 __do_sys_unshare kernel/fork.c:3023 [inline] __se_sys_unshare kernel/fork.c:3021 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3021 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f41329f2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe14c2e5af R14: 00007f41329f2300 R15: 0000000000022000 INFO: task syz-executor.5:16219 blocked for more than 144 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27800 pid:16219 ppid: 22742 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 ib_get_eth_speed+0xeb/0x5c0 drivers/infiniband/core/verbs.c:1818 rxe_query_port+0x13d/0x2d0 drivers/infiniband/sw/rxe/rxe_verbs.c:41 __ib_query_port drivers/infiniband/core/device.c:2041 [inline] ib_query_port drivers/infiniband/core/device.c:2076 [inline] ib_query_port+0x4d9/0x9e0 drivers/infiniband/core/device.c:2066 add_port drivers/infiniband/core/sysfs.c:1064 [inline] ib_setup_port_attrs+0x1ee/0x14f0 drivers/infiniband/core/sysfs.c:1395 add_one_compat_dev+0x4ab/0x800 drivers/infiniband/core/device.c:954 rdma_dev_init_net+0x2dc/0x480 drivers/infiniband/core/device.c:1170 ops_init+0xaf/0x470 net/core/net_namespace.c:152 setup_net+0x2de/0x850 net/core/net_namespace.c:342 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xbd/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x8e0 kernel/fork.c:2955 __do_sys_unshare kernel/fork.c:3023 [inline] __se_sys_unshare kernel/fork.c:3021 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3021 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f17e1d76188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffdccf48bff R14: 00007f17e1d76300 R15: 0000000000022000 INFO: task syz-executor.1:16306 blocked for more than 145 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28000 pid:16306 ppid: 8477 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x331/0x810 net/socket.c:2345 ___sys_sendmsg+0xf3/0x170 net/socket.c:2399 __sys_sendmmsg+0x195/0x470 net/socket.c:2489 __do_sys_sendmmsg net/socket.c:2518 [inline] __se_sys_sendmmsg net/socket.c:2515 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2515 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007fe2e2900188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffcf3d22f8f R14: 00007fe2e2900300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1658: #0: ffffffff8bd73da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 1 lock held by in:imklog/8160: #0: ffff888024dd65f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 3 locks held by kworker/1:16/12458: #0: ffff888148253138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888148253138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888148253138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888148253138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888148253138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888148253138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 kernel/workqueue.c:2246 #1: ffffc900021ffda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250 #2: ffffffff8d4590e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4570 4 locks held by kworker/u4:9/21529: #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8881407a3138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 kernel/workqueue.c:2246 #1: ffffc9000251fda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250 #2: ffffffff8d445c90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:566 #3: ffffffff8d4590e8 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1241 5 locks held by syz-executor.4/16182: #0: ffffffff8d445c90 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:479 #1: ffffffff8d1751d0 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x25e/0x480 drivers/infiniband/core/device.c:1164 #2: ffffffff8d174f50 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2d1/0x480 drivers/infiniband/core/device.c:1169 #3: ffff888066a44f70 (&device->compat_devs_mutex){+.+.}-{3:3}, at: add_one_compat_dev+0xea/0x800 drivers/infiniband/core/device.c:928 #4: ffffffff8d4590e8 (rtnl_mutex){+.+.}-{3:3}, at: ib_get_eth_speed+0xeb/0x5c0 drivers/infiniband/core/verbs.c:1818 6 locks held by syz-executor.5/16219: #0: ffffffff8d445c90 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:479 #1: ffffffff8d1751d0 (devices_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x25e/0x480 drivers/infiniband/core/device.c:1164 #2: ffffffff8d174f50 (rdma_nets_rwsem){++++}-{3:3}, at: rdma_dev_init_net+0x2d1/0x480 drivers/infiniband/core/device.c:1169 #3: ffff88805f094f70 (&device->compat_devs_mutex){+.+.}-{3:3}, at: add_one_compat_dev+0xea/0x800 drivers/infiniband/core/device.c:928 #4: ffff88805f095198 (&rxe->usdev_lock){+.+.}-{3:3}, at: rxe_query_port+0x129/0x2d0 drivers/infiniband/sw/rxe/rxe_verbs.c:40 #5: ffffffff8d4590e8 (rtnl_mutex){+.+.}-{3:3}, at: ib_get_eth_speed+0xeb/0x5c0 drivers/infiniband/core/verbs.c:1818 1 lock held by syz-executor.1/16288: 1 lock held by syz-executor.1/16306: #0: ffffffff8d4590e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d4590e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3f9/0xad0 net/core/rtnetlink.c:5550 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1658 Comm: khungtaskd Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd43/0xfa0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4890 Comm: systemd-journal Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hlock_class kernel/locking/lockdep.c:198 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4507 [inline] RIP: 0010:__lock_acquire+0x485/0x54f0 kernel/locking/lockdep.c:4782 Code: 41 81 e7 ff 1f 45 0f b7 ff be 08 00 00 00 4c 89 f8 48 c1 f8 06 48 8d 3c c5 a0 67 86 8f e8 63 38 5d 00 4c 0f a3 3d fb 07 2e 0e <0f> 83 36 0c 00 00 4b 8d 04 7f 48 c1 e0 06 48 05 c0 6b 86 8f 48 ba RSP: 0018:ffffc90000db0b28 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81585f9d RDX: fffffbfff1f0cd10 RSI: 0000000000000008 RDI: ffffffff8f866878 RBP: ffff8880126f5340 R08: 0000000000000000 R09: ffffffff8f86687f R10: fffffbfff1f0cd0f R11: 0000000000000000 R12: ffff8880126f5cf0 R13: 0000000000000000 R14: ffffc90000db0d90 R15: 00000000000006f0 FS: 00007f5e162f88c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e139bd028 CR3: 0000000011fc3000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 call_timer_fn+0x12b/0x6b0 kernel/time/timer.c:1414 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197 Code: 00 00 00 4d 8b 0b 48 0f bd c8 49 8b 14 24 48 63 c9 e9 66 ff ff ff 4c 01 ca 49 89 13 e9 00 fd ff ff 66 0f 1f 84 00 00 00 00 00 <65> 8b 05 c9 31 8f 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc9000138fc38 EFLAGS: 00000202 RAX: 000000000020cddf RBX: 0000000000000bc4 RCX: ffffffff81584017 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000000016ed R08: 0000000000000001 R09: ffffffff8f866847 R10: fffffbfff1f0cd08 R11: 0000000000000000 R12: 0000000000000041 R13: 0000000000000000 R14: ffffffff815af9d0 R15: 0000000000000001 devkmsg_poll+0x122/0x1d0 kernel/printk/printk.c:832 vfs_poll include/linux/poll.h:90 [inline] ep_item_poll+0xf4/0x190 fs/eventpoll.c:840 ep_send_events fs/eventpoll.c:1677 [inline] ep_poll fs/eventpoll.c:1792 [inline] do_epoll_wait+0x724/0x1920 fs/eventpoll.c:2220 __do_sys_epoll_wait fs/eventpoll.c:2232 [inline] __se_sys_epoll_wait fs/eventpoll.c:2227 [inline] __x64_sys_epoll_wait+0x158/0x270 fs/eventpoll.c:2227 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f5e155c12e3 Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 29 54 2b 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b c2 00 00 48 89 04 24 RSP: 002b:00007fff7bc21888 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 000055f5d3dbc1e0 RCX: 00007f5e155c12e3 RDX: 0000000000000013 RSI: 00007fff7bc21890 RDI: 0000000000000008 RBP: 00007fff7bc21a80 R08: 000055f5d3dbe380 R09: 00007fff7bd6d080 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff7bc21890 R13: 0000000000000001 R14: ffffffffffffffff R15: 0005bad7feaf2fb9