INFO: task kworker/u4:8:10008 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:8 state:D stack:25152 pid:10008 ppid: 2 flags:0x00004000 Workqueue: tc_filter_workqueue fw_delete_filter_work Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 fw_delete_filter_work+0x15/0xe0 net/sched/cls_fw.c:125 process_one_work+0x789/0xfc0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task kworker/u4:6:6636 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:6 state:D stack:26544 pid: 6636 ppid: 2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 cangw_pernet_exit+0xe/0x20 net/can/gw.c:1241 ops_exit_list net/core/net_namespace.c:187 [inline] cleanup_net+0x708/0xbd0 net/core/net_namespace.c:604 process_one_work+0x789/0xfc0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task syz-executor.3:24926 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28768 pid:24926 ppid: 8459 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007f87dc990c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000005 RBP: 000000000119c068 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034 R13: 00007ffd5793a3cf R14: 00007f87dc9919c0 R15: 000000000119c034 INFO: task syz-executor.3:24927 blocked for more than 144 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28768 pid:24927 ppid: 8459 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007f87dc96fc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 000000000119c110 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007ffd5793a3cf R14: 00007f87dc9709c0 R15: 000000000119c0dc INFO: task syz-executor.3:24928 blocked for more than 144 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29664 pid:24928 ppid: 8459 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 sock_do_ioctl+0x11e/0x260 net/socket.c:1050 sock_ioctl+0x416/0x5f0 net/socket.c:1177 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007f87dc94ec68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000008 RBP: 000000000119c1b8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c184 R13: 00007ffd5793a3cf R14: 00007f87dc94f9c0 R15: 000000000119c184 Showing all locks held in the system: 1 lock held by khungtaskd/1647: #0: ffffffff8bd11700 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by systemd-journal/4874: 1 lock held by in:imklog/8099: #0: ffff8880135da870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947 2 locks held by rs:main Q:Reg/8101: #0: ffff888017c6bc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947 #1: ffff888147db6460 (sb_writers#5){.+.+}-{0:0}, at: vfs_write+0x1b3/0xab0 fs/read_write.c:601 3 locks held by kworker/u4:8/10008: #0: ffff88814185a138 ((wq_completion)tc_filter_workqueue){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 kernel/workqueue.c:2248 #1: ffffc90016897d78 ((work_completion)(&(rwork)->work)){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2250 #2: ffffffff8ccee688 (rtnl_mutex){+.+.}-{3:3}, at: fw_delete_filter_work+0x15/0xe0 net/sched/cls_fw.c:125 3 locks held by kworker/1:5/19397: #0: ffff888147545138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 kernel/workqueue.c:2248 #1: ffffc90009667d78 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2250 #2: ffffffff8ccee688 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4570 2 locks held by kworker/u4:3/32169: #0: ffff8880b9c34758 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1320 [inline] #0: ffff8880b9c34758 (&rq->lock){-.-.}-{2:2}, at: __schedule+0xd8/0xe70 kernel/sched/core.c:4995 #1: ffff8880b9c1ff48 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x224/0x5c0 kernel/sched/psi.c:833 4 locks held by kworker/u4:6/6636: #0: ffff8880112a7138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 kernel/workqueue.c:2248 #1: ffffc90002d67d78 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2250 #2: ffffffff8cce2d30 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xac/0xbd0 net/core/net_namespace.c:566 #3: ffffffff8ccee688 (rtnl_mutex){+.+.}-{3:3}, at: cangw_pernet_exit+0xe/0x20 net/can/gw.c:1241 2 locks held by syz-executor.3/24887: 1 lock held by syz-executor.3/24926: #0: ffffffff8ccee688 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8ccee688 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor.3/24927: #0: ffffffff8ccee688 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8ccee688 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 1 lock held by syz-executor.3/24928: #0: ffffffff8ccee688 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x11e/0x260 net/socket.c:1050 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1647 Comm: khungtaskd Not tainted 5.11.0-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:79 [inline] dump_stack+0x137/0x1be lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 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+0xce9/0xd30 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 24887 Comm: syz-executor.3 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_memory_region+0x22a/0x2f0 mm/kasan/generic.c:185 Code: 4d 85 f6 49 0f 49 de 48 83 e3 f8 49 29 de 74 11 45 0f b6 1f 45 84 db 75 64 49 ff c7 49 ff ce 75 ef 5b 41 5c 41 5d 41 5e 41 5f 45 84 db 75 50 45 8a 59 01 45 84 db 0f 85 8a 00 00 00 45 8a 59 RSP: 0018:ffffc90019b2eca8 EFLAGS: 00000056 RAX: 0000000000000001 RBX: 0000000000000d17 RCX: ffffffff815b7ee9 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ef0a620 RBP: ffffc90019b2ee60 R08: dffffc0000000000 R09: fffffbfff1de14c5 R10: fffffbfff1de14c5 R11: 0000000000000000 R12: ffff88801bafd340 R13: ffff88801bafdd10 R14: ffff88801bafdcf0 R15: ffff88801bafdd10 FS: 00007f87dc9b2700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff916f76000 CR3: 000000007446f000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] __lock_acquire+0xd29/0x5e90 kernel/locking/lockdep.c:4802 lock_acquire+0x114/0x5e0 kernel/locking/lockdep.c:5442 __mutex_lock_common+0x173/0x2f00 kernel/locking/mutex.c:956 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 tcf_idr_check_alloc+0xa4/0x380 net/sched/act_api.c:549 tcf_police_init+0x1ce/0x1580 net/sched/act_police.c:81 tcf_action_init_1+0x40d/0xa80 net/sched/act_api.c:1013 tcf_exts_validate+0xd6/0x370 net/sched/cls_api.c:3046 fw_set_parms+0x118/0x840 net/sched/cls_fw.c:208 fw_change+0x7f1/0x1110 net/sched/cls_fw.c:329 tc_new_tfilter+0x13ea/0x2d60 net/sched/cls_api.c:2127 rtnetlink_rcv_msg+0x8f9/0xd60 net/core/rtnetlink.c:5544 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmmsg+0x453/0x680 net/socket.c:2489 __do_sys_sendmmsg net/socket.c:2518 [inline] __se_sys_sendmmsg net/socket.c:2515 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2515 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f87dc9b1c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045e219 RDX: 010efe10675dec16 RSI: 0000000020000200 RDI: 0000000000000003 RBP: 000000000119bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffd5793a3cf R14: 00007f87dc9b29c0 R15: 000000000119bf8c