INFO: task khugepaged:1657 blocked for more than 143 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:khugepaged state:D stack:24496 pid: 1657 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1868 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 __flush_work+0x527/0xac0 kernel/workqueue.c:3053 __lru_add_drain_all+0x3fd/0x760 mm/swap.c:842 khugepaged_do_scan mm/khugepaged.c:2202 [inline] khugepaged+0x10f/0x5530 mm/khugepaged.c:2263 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task kworker/u4:6:14347 blocked for more than 144 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:6 state:D stack:24144 pid:14347 ppid: 2 flags:0x00004000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1868 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 __synchronize_srcu+0x1a6/0x280 kernel/rcu/srcutree.c:935 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:164 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task kworker/u4:12:15798 blocked for more than 144 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:12 state:D stack:24328 pid:15798 ppid: 2 flags:0x00004000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1868 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 __synchronize_srcu+0x1a6/0x280 kernel/rcu/srcutree.c:935 fsnotify_mark_destroy_workfn+0xfd/0x340 fs/notify/mark.c:832 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task kworker/u4:13:15802 blocked for more than 145 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:13 state:D stack:24144 pid:15802 ppid: 2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1868 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 flush_workqueue+0x3ff/0x1600 kernel/workqueue.c:2839 rxrpc_destroy_all_connections+0xf9/0x410 net/rxrpc/conn_object.c:468 rxrpc_exit_net+0x1a4/0x2e0 net/rxrpc/net_ns.c:119 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:175 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:595 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 INFO: task syz-executor.0:15311 blocked for more than 146 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27040 pid:15311 ppid: 8465 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 synchronize_rcu_expedited+0x453/0x620 kernel/rcu/tree_exp.h:853 synchronize_net+0x3c/0x60 net/core/dev.c:10964 packet_release+0xa2a/0xcc0 net/packet/af_packet.c:3100 __sock_release+0xcd/0x280 net/socket.c:647 sock_close+0x18/0x20 net/socket.c:1293 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193eb RSP: 002b:00007ffe0de55f20 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00000000004193eb RDX: 0000000000000000 RSI: ffffffff89201108 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2cc22ea0 R10: 0000000000001c16 R11: 0000000000000293 R12: 000000000056cb00 R13: 000000000056cb00 R14: 000000000056bf80 R15: 00000000001a64ea INFO: task syz-executor.1:15398 blocked for more than 147 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28320 pid:15398 ppid: 8468 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6078 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104 exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] synchronize_rcu_expedited+0x27e/0x620 kernel/rcu/tree_exp.h:837 synchronize_rcu+0xdf/0x180 kernel/rcu/tree.c:3787 synchronize_net+0x4c/0x60 net/core/dev.c:10966 packet_release+0xa2a/0xcc0 net/packet/af_packet.c:3100 __sock_release+0xcd/0x280 net/socket.c:647 sock_close+0x18/0x20 net/socket.c:1293 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193eb RSP: 002b:00007ffcb107ea40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004193eb RDX: 0000000000571268 RSI: 0000001b2cf394ec RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000001046 R10: 00000000f354304a R11: 0000000000000293 R12: 00000000001a6b88 R13: 00000000000003e8 R14: 000000000056bf80 R15: 00000000001a6a9f INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1650 Comm: khungtaskd Tainted: G W 5.13.0-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_lvl+0xcd/0x134 lib/dump_stack.c:96 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+0xd4b/0xfb0 kernel/hung_task.c:294 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 19 Comm: ksoftirqd/1 Tainted: G W 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__in6_dev_get include/net/addrconf.h:313 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:404 [inline] RIP: 0010:find_match.part.0+0x73/0xcc0 net/ipv6/route.c:737 Code: 00 00 00 00 00 fc ff df 4c 8b 3b 49 8d bf 48 03 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 23 0b 00 00 4d 8b bf 48 03 00 00 c8 c6 53 01 31 ff 89 c6 89 45 c0 e8 5c 49 a9 f9 8b 45 c0 85 c0 RSP: 0018:ffffc90000d96a80 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff8880305654a0 RCX: 0000000000000100 RDX: 1ffff11006e54869 RSI: ffffffff87cc420c RDI: ffff8880372a4348 RBP: ffffc90000d96af0 R08: ffffc90000d96ce0 R09: ffffc90000d96cd0 R10: ffffffff87cd004a R11: 0000000000000000 R12: 0000000000000003 R13: 0000000000000001 R14: 000000000000000d R15: ffff888027a08000 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc2c93f6000 CR3: 00000000351a9000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: find_match net/ipv6/route.c:824 [inline] __find_rr_leaf+0x17f/0xd10 net/ipv6/route.c:825 find_rr_leaf net/ipv6/route.c:846 [inline] rt6_select net/ipv6/route.c:890 [inline] fib6_table_lookup+0x5b3/0xa20 net/ipv6/route.c:2174 ip6_pol_route+0x1e1/0x11c0 net/ipv6/route.c:2210 pol_lookup_func include/net/ip6_fib.h:579 [inline] fib6_rule_lookup+0x111/0x6f0 net/ipv6/fib6_rules.c:115 ip6_route_input_lookup net/ipv6/route.c:2280 [inline] ip6_route_input+0x681/0xad0 net/ipv6/route.c:2576 ip6_rcv_finish_core.constprop.0.isra.0+0x168/0x570 net/ipv6/ip6_input.c:63 ip6_rcv_finish+0x174/0x310 net/ipv6/ip6_input.c:74 ip_sabotage_in net/bridge/br_netfilter_hooks.c:873 [inline] ip_sabotage_in+0x206/0x270 net/bridge/br_netfilter_hooks.c:864 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:589 nf_hook.constprop.0+0x379/0x650 include/linux/netfilter.h:262 NF_HOOK include/linux/netfilter.h:305 [inline] ipv6_rcv+0x9e/0x3c0 net/ipv6/ip6_input.c:297 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5486 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5600 netif_receive_skb_internal net/core/dev.c:5705 [inline] netif_receive_skb+0x157/0x8e0 net/core/dev.c:5764 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] br_pass_frame_up+0x2eb/0x3e0 net/bridge/br_input.c:61 br_handle_frame_finish+0x666/0x17a0 net/bridge/br_input.c:169 br_nf_hook_thresh+0x2be/0x350 net/bridge/br_netfilter_hooks.c:1025 br_nf_pre_routing_finish_ipv6+0x69e/0xd80 net/bridge/br_netfilter_ipv6.c:206 NF_HOOK include/linux/netfilter.h:307 [inline] br_nf_pre_routing_ipv6+0x42c/0x7a0 net/bridge/br_netfilter_ipv6.c:236 br_nf_pre_routing+0x1622/0x1e60 net/bridge/br_netfilter_hooks.c:505 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_bridge_pre net/bridge/br_input.c:225 [inline] br_handle_frame+0x97d/0x1170 net/bridge/br_input.c:368 __netif_receive_skb_core+0xa0a/0x37b0 net/core/dev.c:5380 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5484 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5600 process_backlog+0x232/0x6c0 net/core/dev.c:6464 __napi_poll+0xaf/0x440 net/core/dev.c:7019 napi_poll net/core/dev.c:7086 [inline] net_rx_action+0x801/0xb40 net/core/dev.c:7173 __do_softirq+0x29b/0x9bd kernel/softirq.c:558 run_ksoftirqd kernel/softirq.c:920 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295