INFO: task syz-executor.3:28349 blocked for more than 143 seconds. Not tainted 5.7.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D26144 28349 7369 0x80004006 Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x937/0x1ff0 kernel/sched/core.c:4083 rwsem_down_write_slowpath+0x90a/0xf90 kernel/locking/rwsem.c:1216 __sched_text_start+0x8/0x8 schedule+0xd0/0x2a0 kernel/sched/core.c:4158 rwsem_down_write_slowpath+0x706/0xf90 kernel/locking/rwsem.c:1235 rwsem_mark_wake+0x8d0/0x8d0 include/linux/compiler.h:199 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776 lock_release+0x800/0x800 kernel/locking/lockdep.c:4689 __sock_release+0x280/0x280 net/socket.c:605 __down_write kernel/locking/rwsem.c:1389 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1532 atomic64_try_cmpxchg include/asm-generic/atomic-instrumented.h:1504 [inline] atomic_long_try_cmpxchg_acquire include/asm-generic/atomic-long.h:442 [inline] __down_write kernel/locking/rwsem.c:1387 [inline] down_write+0xb2/0x150 kernel/locking/rwsem.c:1532 __down_write kernel/locking/rwsem.c:1389 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1532 __down_timeout+0x2d0/0x2d0 unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776 __sock_release+0x280/0x280 net/socket.c:605 raw_release+0x53/0x730 net/can/raw.c:354 fcntl_setlk+0xcc0/0xcc0 fs/locks.c:2542 __sock_release+0x280/0x280 net/socket.c:605 __sock_release+0xcd/0x280 net/socket.c:605 sock_close+0x18/0x20 net/socket.c:1283 __fput+0x33e/0x880 fs/file_table.c:280 task_work_run+0xf4/0x1b0 kernel/task_work.c:123 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xb34/0x2dd0 kernel/exit.c:796 find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:4458 mm_update_next_owner+0x7a0/0x7a0 kernel/exit.c:375 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 do_group_exit+0x125/0x340 kernel/exit.c:894 get_signal+0x47b/0x24e0 kernel/signal.c:2739 find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:4458 do_signal+0x81/0x2240 arch/x86/kernel/signal.c:784 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 rcu_read_lock_any_held.part.0+0x50/0x50 arch/x86/include/asm/paravirt.h:754 get_sigframe.isra.0+0x730/0x730 arch/x86/kernel/signal.c:268 rcu_read_unlock_sched include/linux/rcupdate.h:732 [inline] __fd_install+0x1e6/0x600 fs/file.c:613 __sys_socket+0x16d/0x200 net/socket.c:438 move_addr_to_kernel+0x70/0x70 net/socket.c:195 exit_to_usermode_loop+0x26c/0x360 arch/x86/entry/common.c:161 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline] syscall_return_slowpath arch/x86/entry/common.c:279 [inline] do_syscall_64+0x6b1/0x7d0 arch/x86/entry/common.c:305 entry_SYSCALL_64_after_hwframe+0x49/0xb3 Showing all locks held in the system: 4 locks held by kworker/u4:0/7: #0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239 #1: ffffc90000cdfdc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243 #2: ffffffff8a57a930 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa50 net/core/net_namespace.c:565 #3: ffffffff899c29e8 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x44/0x4b0 kernel/rcu/tree.c:3332 1 lock held by khungtaskd/1143: #0: ffffffff899bea80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754 1 lock held by in:imklog/6715: #0: ffff888098690170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 8 locks held by kworker/u4:9/11942: 2 locks held by syz-executor.3/28349: #0: ffff888056e9d750 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:797 [inline] #0: ffff888056e9d750 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:604 #1: ffffffff8a57a930 (pernet_ops_rwsem){++++}-{3:3}, at: unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1143 Comm: khungtaskd Not tainted 5.7.0-rc5-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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 lapic_can_unplug_cpu.cold+0x3b/0x3b nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa8c/0x1010 kernel/hung_task.c:289 reset_hung_task_detector+0x30/0x30 kernel/hung_task.c:243 kthread+0x388/0x470 kernel/kthread.c:268 kthread_mod_delayed_work+0x1a0/0x1a0 kernel/kthread.c:1090 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 11942 Comm: kworker/u4:9 Not tainted 5.7.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: krdsd rds_tcp_accept_worker RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:3764 [inline] RIP: 0010:preempt_count_add+0x54/0x140 kernel/sched/core.c:3790 Code: 84 d2 0f 85 e1 00 00 00 8b 15 58 b2 17 0b 65 01 1d 39 00 b3 7e 85 d2 75 11 65 8b 05 2e 00 b3 7e 0f b6 c0 3d f4 00 00 00 7f 64 <65> 8b 05 1d 00 b3 7e 25 ff ff ff 7f 39 c3 74 03 5b 5d c3 48 8b 5c RSP: 0018:ffffc90000006f50 EFLAGS: 00000297 RAX: 0000000000000003 RBX: 0000000000000001 RCX: 1ffffffff18cda1c RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001 R10: 000000000010bfb3 R11: 000000000007001f R12: ffffc90000007088 R13: 0000000000000000 R14: ffff888061404500 R15: ffffc90000007040 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c008eb1fc8 CR3: 00000000a8872000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0x11f/0x1df0 arch/x86/kernel/unwind_orc.c:427 process_backlog+0x21e/0x7a0 net/core/dev.c:6144 deref_stack_reg+0xe0/0xe0 arch/x86/kernel/unwind_orc.c:354 unwind_next_frame+0x538/0x1df0 arch/x86/kernel/unwind_orc.c:611 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 profile_setup.cold+0xc1/0xc1 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25 process_backlog+0x21e/0x7a0 net/core/dev.c:6144 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123 stack_trace_consume_entry+0x160/0x160 kernel/stacktrace.c:93 save_stack+0x1b/0x40 mm/kasan/common.c:49 save_stack+0x1b/0x40 mm/kasan/common.c:49 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 kmem_cache_alloc_node_trace+0x161/0x790 mm/slab.c:3595 __do_kmalloc_node mm/slab.c:3615 [inline] __kmalloc_node_track_caller+0x38/0x60 mm/slab.c:3630 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:142 __alloc_skb+0xef/0x5a0 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1083 [inline] __tcp_send_ack.part.0+0x67/0x5a0 net/ipv4/tcp_output.c:3758 __tcp_send_ack net/ipv4/tcp_output.c:3785 [inline] tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3785 tcp_fin+0x413/0x940 net/ipv4/tcp_input.c:4188 tcp_data_queue+0x1851/0x44b0 net/ipv4/tcp_input.c:4810 tcp_rcv_state_process+0xd64/0x523e net/ipv4/tcp_input.c:6381 tcp_v6_do_rcv+0x7d2/0x1290 net/ipv6/tcp_ipv6.c:1463 tcp_v6_rcv+0x2d07/0x3640 net/ipv6/tcp_ipv6.c:1671 ip6_protocol_deliver_rcu+0x2e6/0x1660 net/ipv6/ip6_input.c:433 ip6_input_finish+0x7f/0x160 net/ipv6/ip6_input.c:474 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip6_input+0xcf/0x3d0 net/ipv6/ip6_input.c:483 dst_input include/net/dst.h:441 [inline] ip6_rcv_finish+0x1d9/0x310 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ipv6_rcv+0xf8/0x3f0 net/ipv6/ip6_input.c:307 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5198 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5312 process_backlog+0x21e/0x7a0 net/core/dev.c:6144 napi_poll net/core/dev.c:6582 [inline] net_rx_action+0x4c2/0x1070 net/core/dev.c:6650 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.0+0x10f/0x160 kernel/softirq.c:337 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x20e/0x270 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline] ip6_finish_output2+0x10f8/0x25b0 net/ipv6/ip6_output.c:118 __ip6_finish_output+0x442/0xab0 net/ipv6/ip6_output.c:143 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x239/0x810 net/ipv6/ip6_output.c:176 dst_output include/net/dst.h:435 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip6_xmit+0xe1a/0x2090 net/ipv6/ip6_output.c:280 inet6_csk_xmit+0x339/0x610 net/ipv6/inet6_connection_sock.c:135 __tcp_transmit_skb+0x1a10/0x3770 net/ipv4/tcp_output.c:1238 tcp_transmit_skb net/ipv4/tcp_output.c:1254 [inline] tcp_write_xmit+0xf95/0x5bf0 net/ipv4/tcp_output.c:2517 __tcp_push_pending_frames+0xaa/0x330 net/ipv4/tcp_output.c:2693 tcp_send_fin+0x121/0xce0 net/ipv4/tcp_output.c:3243 tcp_shutdown net/ipv4/tcp.c:2332 [inline] tcp_shutdown+0xf6/0x120 net/ipv4/tcp.c:2317 inet_shutdown+0x1a8/0x3a0 net/ipv4/af_inet.c:879 rds_tcp_accept_one+0x566/0xb70 net/rds/tcp_listen.c:245 rds_tcp_accept_worker+0x50/0x80 net/rds/tcp.c:525 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 __tcp_transmit_skb+0x1a10/0x3770 net/ipv4/tcp_output.c:1238 print_usage_bug+0x240/0x240 kernel/locking/lockdep.c:101 tcp_shutdown net/ipv4/tcp.c:2332 [inline] tcp_shutdown+0xf6/0x120 net/ipv4/tcp.c:2317 inet_shutdown+0x1a8/0x3a0 net/ipv4/af_inet.c:879 rds_tcp_accept_one+0x566/0xb70 net/rds/tcp_listen.c:245 rds_tcp_accept_worker+0x50/0x80 net/rds/tcp.c:525 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kasan_poison_shadow mm/kasan/common.c:131 [inline] kasan_unpoison_shadow+0x30/0x40 mm/kasan/common.c:145 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 slab_alloc_node mm/slab.c:3257 [inline] kmem_cache_alloc_node_trace+0x240/0x790 mm/slab.c:3593 kmem_cache_alloc_node_trace+0x161/0x790 mm/slab.c:3595 rcu_read_lock_any_held.part.0+0x50/0x50 arch/x86/include/asm/paravirt.h:754 slab_alloc_node mm/slab.c:3257 [inline] kmem_cache_alloc_node+0x222/0x760 mm/slab.c:3575 __do_kmalloc_node mm/slab.c:3615 [inline] __kmalloc_node_track_caller+0x38/0x60 mm/slab.c:3630 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:142 __alloc_skb+0xef/0x5a0 net/core/skbuff.c:210 __kmalloc_reserve.isra.0+0xe0/0xe0 net/core/skbuff.c:154 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class kernel/locking/lockdep.c:179 [inline] mark_lock+0x12b/0xf10 kernel/locking/lockdep.c:3912 alloc_skb include/linux/skbuff.h:1083 [inline] __tcp_send_ack.part.0+0x67/0x5a0 net/ipv4/tcp_output.c:3758 __tcp_send_ack net/ipv4/tcp_output.c:3785 [inline] tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3785 tcp_fin+0x413/0x940 net/ipv4/tcp_input.c:4188 tcp_data_queue+0x1851/0x44b0 net/ipv4/tcp_input.c:4810 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3649 [inline] lockdep_hardirqs_on+0x196/0x620 kernel/locking/lockdep.c:3702 tcp_urg+0x108/0xb80 net/ipv4/tcp_input.c:5408 tcp_send_rcvq+0x4c0/0x4c0 net/ipv4/tcp_input.c:4738 __tcp_ack_snd_check+0x950/0x950 net/ipv4/tcp_input.c:5290 tcp_validate_incoming+0x43e/0x16b0 net/ipv4/tcp_input.c:5522 tcp_rcv_state_process+0xd64/0x523e net/ipv4/tcp_input.c:6381 tcp_finish_connect+0x500/0x500 include/net/sock.h:2521 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 tcp_v6_rcv+0x2a8f/0x3640 net/ipv6/tcp_ipv6.c:1665 lock_release+0x800/0x800 kernel/locking/lockdep.c:4689 tcp_v6_inbound_md5_hash+0x261/0x3d0 net/ipv6/tcp_ipv6.c:754 tcp_v6_do_rcv+0x7d2/0x1290 net/ipv6/tcp_ipv6.c:1463 tcp_v6_do_rcv+0x7d2/0x1290 net/ipv6/tcp_ipv6.c:1463 tcp_v6_rcv+0x2d07/0x3640 net/ipv6/tcp_ipv6.c:1671 tcp_v6_err+0x1790/0x1790 include/net/sock.h:1621 lock_is_held include/linux/lockdep.h:406 [inline] rcu_read_lock_held kernel/rcu/update.c:307 [inline] rcu_read_lock_held+0x9c/0xb0 kernel/rcu/update.c:301 rcu_read_lock_held_common+0x130/0x130 kernel/rcu/update.c:275 ip6_protocol_deliver_rcu+0x2e6/0x1660 net/ipv6/ip6_input.c:433 ip6_input_finish+0x7f/0x160 net/ipv6/ip6_input.c:474 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip6_input+0xcf/0x3d0 net/ipv6/ip6_input.c:483 ip6_input_finish+0x160/0x160 include/linux/rcupdate.h:602 rcu_read_unlock include/linux/rcupdate.h:651 [inline] nf_hook include/linux/netfilter.h:264 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] ipv6_rcv+0x274/0x3f0 net/ipv6/ip6_input.c:307 ip6_protocol_deliver_rcu+0x1660/0x1660 net/ipv6/ip6_input.c:453 lock_downgrade+0x840/0x840 kernel/locking/lockdep.c:4579 dst_input include/net/dst.h:441 [inline] ip6_rcv_finish+0x1d9/0x310 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ipv6_rcv+0xf8/0x3f0 net/ipv6/ip6_input.c:307 ip6_rcv_core.isra.0+0x1cb0/0x1cb0 net/ipv6/ip6_input.c:266 ip6_rcv_finish_core.isra.0+0x580/0x580 include/linux/ipv6.h:95 ip6_rcv_core.isra.0+0x1cb0/0x1cb0 net/ipv6/ip6_input.c:266 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5198 __netif_receive_skb_core+0x31c0/0x31c0 net/core/dev.c:4850 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:694 [inline] queued_spin_lock include/asm-generic/qspinlock.h:78 [inline] do_raw_spin_lock+0x129/0x2e0 kernel/locking/spinlock_debug.c:113 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5312 process_backlog+0x21e/0x7a0 net/core/dev.c:6144 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 net_rx_action+0x25f/0x1070 net/core/dev.c:6638 napi_poll net/core/dev.c:6582 [inline] net_rx_action+0x4c2/0x1070 net/core/dev.c:6650 napi_busy_loop+0x950/0x950 net/core/dev.c:6393 rcu_read_lock_any_held.part.0+0x50/0x50 arch/x86/include/asm/paravirt.h:754 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 rcu_read_unlock_bh include/linux/rcupdate.h:686 [inline] ip6_finish_output2+0x10ca/0x25b0 net/ipv6/ip6_output.c:118 do_softirq.part.0+0x10f/0x160 kernel/softirq.c:337 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x20e/0x270 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:690 [inline] ip6_finish_output2+0x10f8/0x25b0 net/ipv6/ip6_output.c:118 ip6_frag_next+0xb40/0xb40 net/ipv6/ip6_output.c:725 lock_is_held include/linux/lockdep.h:406 [inline] rcu_read_lock_held kernel/rcu/update.c:307 [inline] rcu_read_lock_held+0x9c/0xb0 kernel/rcu/update.c:301 rcu_read_lock_held_common+0x130/0x130 kernel/rcu/update.c:275 __ip6_finish_output+0x442/0xab0 net/ipv6/ip6_output.c:143 __ip6_finish_output+0x442/0xab0 net/ipv6/ip6_output.c:143 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x239/0x810 net/ipv6/ip6_output.c:176 ip6_finish_output+0x1f0/0x1f0 include/net/inet_sock.h:266 __ip6_finish_output+0xab0/0xab0 include/net/ip6_route.h:270 lock_is_held include/linux/lockdep.h:406 [inline] rcu_read_lock_held kernel/rcu/update.c:307 [inline] rcu_read_lock_held+0x9c/0xb0 kernel/rcu/update.c:301 rcu_read_lock_held_common+0x130/0x130 kernel/rcu/update.c:275 nf_hook_slow+0xee/0x1e0 net/netfilter/core.c:513 dst_output include/net/dst.h:435 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip6_xmit+0xe1a/0x2090 net/ipv6/ip6_output.c:280 ip6_finish_output2+0x25b0/0x25b0 include/linux/ipv6.h:95 ip6_setup_cork+0x1760/0x1760 include/net/xfrm.h:952 lock_is_held include/linux/lockdep.h:406 [inline] rcu_read_lock_held kernel/rcu/update.c:307 [inline] rcu_read_lock_held+0x9c/0xb0 kernel/rcu/update.c:301 rcu_read_lock_held_common+0x130/0x130 kernel/rcu/update.c:275 inet6_csk_xmit+0x339/0x610 net/ipv6/inet6_connection_sock.c:135 inet6_csk_update_pmtu+0x180/0x180 net/ipv6/inet6_connection_sock.c:149 __skb_pull include/linux/skbuff.h:2307 [inline] __pskb_trim_head+0x830/0x830 net/ipv4/tcp_output.c:1469 atomic_inc include/asm-generic/atomic-instrumented.h:239 [inline] __skb_clone+0x5af/0x7a0 net/core/skbuff.c:1005 csum_ipv6_magic+0x1b/0x70 arch/x86/lib/csum-wrappers_64.c:143 __tcp_transmit_skb+0x1a10/0x3770 net/ipv4/tcp_output.c:1238 __tcp_select_window+0x890/0x890 include/linux/memcontrol.h:1340 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class kernel/locking/lockdep.c:179 [inline] mark_lock+0x12b/0xf10 kernel/locking/lockdep.c:3912 ktime_get_ns include/linux/timekeeping.h:154 [inline] tcp_clock_ns include/net/tcp.h:762 [inline] tcp_mstamp_refresh net/ipv4/tcp_output.c:55 [inline] tcp_write_xmit+0x2e/0x5bf0 net/ipv4/tcp_output.c:2439 seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] ktime_get kernel/time/timekeeping.c:757 [inline] ktime_get+0xff/0x2f0 kernel/time/timekeeping.c:747 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline] lockdep_hardirqs_on+0x463/0x620 kernel/locking/lockdep.c:3702 ktime_get kernel/time/timekeeping.c:763 [inline] ktime_get+0x1f8/0x2f0 kernel/time/timekeeping.c:747 tcp_transmit_skb net/ipv4/tcp_output.c:1254 [inline] tcp_write_xmit+0xf95/0x5bf0 net/ipv4/tcp_output.c:2517 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:694 [inline] queued_spin_lock include/asm-generic/qspinlock.h:78 [inline] do_raw_spin_lock+0x129/0x2e0 kernel/locking/spinlock_debug.c:113 __tcp_push_pending_frames+0xaa/0x330 net/ipv4/tcp_output.c:2693 tcp_send_fin+0x121/0xce0 net/ipv4/tcp_output.c:3243 tcp_shutdown net/ipv4/tcp.c:2332 [inline] tcp_shutdown+0xf6/0x120 net/ipv4/tcp.c:2317 tcp_set_state+0x780/0x780 include/net/sock.h:1621 inet_shutdown+0x1a8/0x3a0 net/ipv4/af_inet.c:879 rds_tcp_accept_one+0x566/0xb70 net/rds/tcp_listen.c:245 rds_tcp_set_linger+0xb0/0xb0 net/rds/tcp_listen.c:123 lock_is_held include/linux/lockdep.h:406 [inline] rcu_read_lock_sched_held+0x9c/0xd0 kernel/rcu/update.c:121 rds_tcp_accept_worker+0x50/0x80 net/rds/tcp.c:525 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268 lock_release+0x800/0x800 kernel/locking/lockdep.c:4689 pwq_dec_nr_in_flight+0x310/0x310 kernel/workqueue.c:1198 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 process_one_work+0x16a0/0x16a0 kernel/workqueue.c:2273 kthread+0x388/0x470 kernel/kthread.c:268 kthread_mod_delayed_work+0x1a0/0x1a0 kernel/kthread.c:1090 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351