INFO: task syz.2.3518:20912 blocked for more than 143 seconds. Not tainted 6.11.0-rc1-syzkaller-00334-ga5dbd76a8942 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.3518 state:D stack:25984 pid:20912 tgid:20911 ppid:20549 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 blkdev_common_ioctl+0xeb7/0x2410 block/ioctl.c:605 blkdev_ioctl+0x4cd/0x6b0 block/ioctl.c:670 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f82ecd779f9 RSP: 002b:00007f82eda7d048 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f82ecf05f80 RCX: 00007f82ecd779f9 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000006 RBP: 00007f82ecde58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f82ecf05f80 R15: 00007f82ed02fa38 INFO: task syz.2.3518:20913 blocked for more than 144 seconds. Not tainted 6.11.0-rc1-syzkaller-00334-ga5dbd76a8942 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.3518 state:D stack:27360 pid:20913 tgid:20911 ppid:20549 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 blkdev_common_ioctl+0xeb7/0x2410 block/ioctl.c:605 blkdev_ioctl+0x4cd/0x6b0 block/ioctl.c:670 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f82ecd779f9 RSP: 002b:00007f82ec7ff048 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f82ecf06058 RCX: 00007f82ecd779f9 RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000007 RBP: 00007f82ecde58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f82ecf06058 R15: 00007f82ed02fa38 INFO: task syz.2.3518:20914 blocked for more than 144 seconds. Not tainted 6.11.0-rc1-syzkaller-00334-ga5dbd76a8942 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.3518 state:D stack:27392 pid:20914 tgid:20911 ppid:20549 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 blkdev_ioctl+0x40f/0x6b0 block/ioctl.c:665 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f82ecd779f9 RSP: 002b:00007f82ec7de048 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f82ecf06130 RCX: 00007f82ecd779f9 RDX: 0000000020000280 RSI: 00000000c0481273 RDI: 0000000000000007 RBP: 00007f82ecde58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f82ecf06130 R15: 00007f82ed02fa38 INFO: task syz.2.3518:20915 blocked for more than 145 seconds. Not tainted 6.11.0-rc1-syzkaller-00334-ga5dbd76a8942 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.3518 state:D stack:27392 pid:20915 tgid:20911 ppid:20549 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 blkdev_ioctl+0x40f/0x6b0 block/ioctl.c:665 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f82ecd779f9 RSP: 002b:00007f82ec7bd048 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f82ecf06208 RCX: 00007f82ecd779f9 RDX: 0000000020000580 RSI: 00000000c0481273 RDI: 0000000000000006 RBP: 00007f82ecde58ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f82ecf06208 R15: 00007f82ed02fa38 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e9382a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6620 3 locks held by kworker/u8:7/2489: #0: ffff88802aa54948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88802aa54948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc900096bfd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc900096bfd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fc816c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4194 2 locks held by getty/4981: #0: ffff88802b4bf0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000311b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:1/15892: #0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc900115ffd00 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc900115ffd00 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8e7e17d0 (umhelper_sem){++++}-{3:3}, at: usermodehelper_read_lock_wait+0x14e/0x260 kernel/umh.c:247 2 locks held by kworker/u8:0/17283: 5 locks held by kworker/0:7/18260: #0: ffff8880b923ea18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:568 #1: ffff8880b9228948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:989 #2: ffffffff8e938300 (rcu_read_lock_bh){....}-{1:2}, at: local_bh_disable include/linux/bottom_half.h:20 [inline] #2: ffffffff8e938300 (rcu_read_lock_bh){....}-{1:2}, at: rcu_read_lock_bh include/linux/rcupdate.h:890 [inline] #2: ffffffff8e938300 (rcu_read_lock_bh){....}-{1:2}, at: keep_key_fresh drivers/net/wireguard/send.c:129 [inline] #2: ffffffff8e938300 (rcu_read_lock_bh){....}-{1:2}, at: wg_packet_create_data_done drivers/net/wireguard/send.c:259 [inline] #2: ffffffff8e938300 (rcu_read_lock_bh){....}-{1:2}, at: wg_packet_tx_worker+0x25f/0x810 drivers/net/wireguard/send.c:276 #3: ffffffff9516e318 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x16d/0x510 lib/debugobjects.c:709 #4: ffffffff95104208 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x16d/0x510 lib/debugobjects.c:709 3 locks held by kworker/0:9/18261: #0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90002da7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90002da7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 #2: ffffffff8fc816c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 3 locks held by syz.4.3449/20526: 1 lock held by syz.2.3518/20912: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.2.3518/20913: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.2.3518/20914: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.2.3518/20915: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.3580/21124: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.3580/21131: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.3701/21608: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.3701/21610: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.3701/21612: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.3701/21614: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.3709/21655: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.4.3709/21659: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.3888/22387: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 1 lock held by syz.3.3888/22388: #0: ffff8880205bc010 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xdd/0x9a0 kernel/trace/blktrace.c:735 3 locks held by syz-executor/22505: #0: ffff88805a330d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline] #0: ffff88805a330d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2692 #1: ffff88805a330078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5131 #2: ffffffff8fdecfe8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fdecfe8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592 2 locks held by syz.0.3959/22741: #0: ffffffff8fc816c8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8fc816c8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3510 #1: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline] #1: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958 1 lock held by syz.1.3961/22750: #0: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline] #0: ffffffff8e93d678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958 2 locks held by syz.2.3963/22751: #0: ffff8881db694d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline] #0: ffff8881db694d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2692 #1: ffff8881db694078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5131 3 locks held by syz.4.3960/22756: #0: ffff8881e12ccd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:481 [inline] #0: ffff8881e12ccd80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2692 #1: ffff8881e12cc078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x572/0x11a0 net/bluetooth/hci_sync.c:5131 #2: ffffffff8fdecfe8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1977 [inline] #2: ffffffff8fdecfe8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa6/0x240 net/bluetooth/hci_conn.c:2592 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc1-syzkaller-00334-ga5dbd76a8942 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xfee/0x1030 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 8732 Comm: kworker/u8:13 Not tainted 6.11.0-rc1-syzkaller-00334-ga5dbd76a8942 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline] RIP: 0010:rcu_is_watching+0x10/0xb0 kernel/rcu/tree.c:726 Code: 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 ff 05 38 25 8a 7e 8b 35 3c 0a 89 c3 83 f8 08 73 7a 49 bf 00 00 00 00 00 fc ff df RSP: 0018:ffffc9000f06fac8 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffff88807adfccc0 RCX: ffff88802765bc00 RDX: ffff88802765bc00 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff8b80981a R09: 1ffffffff26e5900 R10: dffffc0000000000 R11: fffffbfff26e5901 R12: ffff88807adfccc0 R13: 1ffff1100f5bfafb R14: ffff88815d657b88 R15: ffffffff8b809ae0 FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005562a1fe7043 CR3: 000000000e734000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock include/linux/rcupdate.h:839 [inline] batadv_nc_process_nc_paths+0xf3/0x3a0 net/batman-adv/network-coding.c:687 batadv_nc_worker+0x42a/0x610 net/batman-adv/network-coding.c:728 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244