INFO: task kworker/u4:8:16526 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:8 state:D stack:22800 pid:16526 ppid: 2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 ip6gre_exit_batch_net+0xc0/0x4a0 net/ipv6/ip6_gre.c:1626 ops_exit_list net/core/net_namespace.c:171 [inline] cleanup_net+0x7ec/0xc50 net/core/net_namespace.c:591 process_one_work+0x853/0x1140 kernel/workqueue.c:2297 worker_thread+0xac1/0x1320 kernel/workqueue.c:2444 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 INFO: task systemd-udevd:31289 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26736 pid:31289 ppid: 4858 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 dev_ioctl+0x277/0xf30 net/core/dev_ioctl.c:521 sock_do_ioctl+0x34d/0x5b0 net/socket.c:1132 sock_ioctl+0x4f7/0x990 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9286f8e017 RSP: 002b:00007ffdaacfd7e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffdaacfd830 RCX: 00007f9286f8e017 RDX: 00007ffdaacfd800 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffdaacfd9a0 R08: 0000000000000000 R09: 0000000000000060 R10: 0000000000000001 R11: 0000000000000246 R12: 0000561d56b68cf0 R13: 00007ffdaacfd800 R14: 0000000000000001 R15: 0000000000000000 INFO: task systemd-udevd:31290 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26008 pid:31290 ppid: 4858 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 dev_ioctl+0x277/0xf30 net/core/dev_ioctl.c:521 sock_do_ioctl+0x34d/0x5b0 net/socket.c:1132 sock_ioctl+0x4f7/0x990 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9286f8e017 RSP: 002b:00007ffdaacfddd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffdaacfde20 RCX: 00007f9286f8e017 RDX: 00007ffdaacfddf0 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffdaacfdf90 R08: 0000000000000000 R09: 00000000000000d8 R10: 0000000000000001 R11: 0000000000000246 R12: 0000561d56b68cf0 R13: 00007ffdaacfddf0 R14: 0000000000000001 R15: 0000000000000000 INFO: task systemd-udevd:31292 blocked for more than 144 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:26736 pid:31292 ppid: 4858 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 dev_ioctl+0x277/0xf30 net/core/dev_ioctl.c:521 sock_do_ioctl+0x34d/0x5b0 net/socket.c:1132 sock_ioctl+0x4f7/0x990 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f9286f8e017 RSP: 002b:00007ffdaacfddd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffdaacfde20 RCX: 00007f9286f8e017 RDX: 00007ffdaacfddf0 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffdaacfdf90 R08: 0000000000000000 R09: 0000000000000090 R10: 0000000000000001 R11: 0000000000000246 R12: 0000561d56b68cf0 R13: 00007ffdaacfddf0 R14: 0000000000000001 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by kworker/u4:4/199: 1 lock held by khungtaskd/1630: #0: ffffffff8c91bfc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by in:imklog/8111: #0: ffff8880284be370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990 2 locks held by agetty/8115: #0: ffff88801a890098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90000eb82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113 3 locks held by kworker/0:5/10334: #0: ffff88801a8d2138 ((wq_completion)infiniband){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc900178bfd20 ((work_completion)(&work->work)#2){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffff88807d9bd208 (&rxe->usdev_lock){+.+.}-{3:3}, at: rxe_query_port+0x46/0x1a0 drivers/infiniband/sw/rxe/rxe_verbs.c:40 4 locks held by kworker/u4:8/16526: #0: ffff8880124d3138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90001e8fd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d94f930 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc50 net/core/net_namespace.c:553 #3: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: ip6gre_exit_batch_net+0xc0/0x4a0 net/ipv6/ip6_gre.c:1626 3 locks held by kworker/0:8/21025: #0: ffff888028554938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90010bffd20 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4590 3 locks held by kworker/0:11/21029: #0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90010bcfd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251 4 locks held by kworker/0:12/21030: #0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90010c2fd20 ((work_completion)(&smcibdev->port_event_work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffff88807d9bd208 (&rxe->usdev_lock){+.+.}-{3:3}, at: rxe_query_port+0x46/0x1a0 drivers/infiniband/sw/rxe/rxe_verbs.c:40 #3: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: ib_get_eth_speed+0x144/0x5f0 drivers/infiniband/core/verbs.c:1900 2 locks held by kworker/0:13/21210: #0: ffff888011066538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90001bcfd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 3 locks held by kworker/0:14/21216: #0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90001a3fd20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74 1 lock held by syz-executor.5/31282: #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:684 [inline] #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3c/0x130 drivers/net/tun.c:3397 2 locks held by syz-executor.0/31277: #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 #1: ffffffff8c9207a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8c9207a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x277/0x750 kernel/rcu/tree_exp.h:837 1 lock held by syz-executor.1/31286: #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:684 [inline] #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3c/0x130 drivers/net/tun.c:3397 1 lock held by systemd-udevd/31289: #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x277/0xf30 net/core/dev_ioctl.c:521 1 lock held by systemd-udevd/31290: #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x277/0xf30 net/core/dev_ioctl.c:521 1 lock held by systemd-udevd/31292: #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x277/0xf30 net/core/dev_ioctl.c:521 1 lock held by syz-executor.4/31309: #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 1 lock held by syz-executor.3/31311: #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 1 lock held by syz-executor.2/31312: #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d95b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1630 Comm: khungtaskd Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:105 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc54/0xca0 kernel/hung_task.c:295 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 263 Comm: kworker/u4:5 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:validate_chain+0x609/0x8240 kernel/locking/lockdep.c:3796 Code: 8d 28 a8 02 89 c3 e8 e6 c5 fe ff 85 db 0f 85 ce 01 00 00 48 c7 c0 44 21 dc 8d 48 c1 e8 03 42 8a 04 20 84 c0 0f 85 e2 04 00 00 <83> 3d 54 3b 77 0c 00 0f 84 d7 01 00 00 bb 01 00 00 00 48 c7 84 24 RSP: 0018:ffffc90001b9f5e0 EFLAGS: 00000046 RAX: 1ffffffff1bb8400 RBX: 0000000000020027 RCX: f1b693cc9b8e8188 RDX: 0000000000000000 RSI: ffff8880135f5fc8 RDI: ffff8880135f5580 RBP: ffffc90001b9f8f0 R08: dffffc0000000000 R09: fffffbfff1fa2fb9 R10: fffffbfff1fa2fb9 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff92000373edc R14: f1b693cc9b8e8188 R15: f1b693cc9b8e8188 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056162b07fc98 CR3: 000000000c68e000 CR4: 00000000001506f0 Call Trace: __lock_acquire+0x1382/0x2b00 kernel/locking/lockdep.c:5015 lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267 rcu_read_lock include/linux/rcupdate.h:687 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:410 [inline] batadv_nc_worker+0xc8/0x5b0 net/batman-adv/network-coding.c:721 process_one_work+0x853/0x1140 kernel/workqueue.c:2297 worker_thread+0xac1/0x1320 kernel/workqueue.c:2444 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess): 0: 8d 28 lea (%rax),%ebp 2: a8 02 test $0x2,%al 4: 89 c3 mov %eax,%ebx 6: e8 e6 c5 fe ff callq 0xfffec5f1 b: 85 db test %ebx,%ebx d: 0f 85 ce 01 00 00 jne 0x1e1 13: 48 c7 c0 44 21 dc 8d mov $0xffffffff8ddc2144,%rax 1a: 48 c1 e8 03 shr $0x3,%rax 1e: 42 8a 04 20 mov (%rax,%r12,1),%al 22: 84 c0 test %al,%al 24: 0f 85 e2 04 00 00 jne 0x50c * 2a: 83 3d 54 3b 77 0c 00 cmpl $0x0,0xc773b54(%rip) # 0xc773b85 <-- trapping instruction 31: 0f 84 d7 01 00 00 je 0x20e 37: bb 01 00 00 00 mov $0x1,%ebx 3c: 48 rex.W 3d: c7 .byte 0xc7 3e: 84 .byte 0x84 3f: 24 .byte 0x24