wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready Bluetooth: hci8: command 0x041b tx timeout Bluetooth: hci8: command 0x040f tx timeout Bluetooth: hci8: command 0x0419 tx timeout INFO: task syz-executor.2:12715 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28712 12715 19721 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 iterate_supers+0xdb/0x290 fs/super.c:631 ksys_sync+0x86/0x150 fs/sync.c:113 __ia32_sys_sync+0xa/0x10 fs/sync.c:124 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb9b69040f9 Code: Bad RIP value. RSP: 002b:00007fb9b4e76168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007fb9b6a23f80 RCX: 00007fb9b69040f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fb9b695fae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffddcfe58af R14: 00007fb9b4e76300 R15: 0000000000022000 INFO: task syz-executor.2:12722 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D30592 12722 19721 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 iterate_supers+0xdb/0x290 fs/super.c:631 ksys_sync+0x86/0x150 fs/sync.c:113 __ia32_sys_sync+0xa/0x10 fs/sync.c:124 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb9b69040f9 Code: Bad RIP value. RSP: 002b:00007fb9b4e55168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007fb9b6a24050 RCX: 00007fb9b69040f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fb9b695fae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffddcfe58af R14: 00007fb9b4e55300 R15: 0000000000022000 INFO: task syz-executor.2:12731 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28304 12731 19721 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 iterate_supers+0xdb/0x290 fs/super.c:631 ksys_sync+0x86/0x150 fs/sync.c:113 __ia32_sys_sync+0xa/0x10 fs/sync.c:124 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb9b69040f9 Code: Bad RIP value. RSP: 002b:00007fb9b4e34168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007fb9b6a24120 RCX: 00007fb9b69040f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fb9b695fae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffddcfe58af R14: 00007fb9b4e34300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000fa79ee54 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7774: #0: 000000008216b12f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 2 locks held by agetty/7832: #0: 000000004bac4a82 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000e1fc8002 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154 5 locks held by syz-executor.2/19527: 1 lock held by syz-executor.2/12715: #0: 0000000010b2503a (&type->s_umount_key#50){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.2/12722: #0: 0000000010b2503a (&type->s_umount_key#50){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.2/12731: #0: 0000000010b2503a (&type->s_umount_key#50){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.2/13136: #0: 0000000010b2503a (&type->s_umount_key#50){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.2/13137: #0: 0000000010b2503a (&type->s_umount_key#50){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.2/13487: #0: 0000000010b2503a (&type->s_umount_key#50){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.2/13489: #0: 0000000010b2503a (&type->s_umount_key#50){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 19542 Comm: loop2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x50 kernel/kcov.c:101 Code: 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e <81> e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 48 8b 88 RSP: 0018:ffff888051c47668 EFLAGS: 00000093 RAX: ffff888050936600 RBX: 0000000000000006 RCX: ffffffff83771e23 RDX: 0000000080000006 RSI: ffffffff83771e31 RDI: 0000000000000005 RBP: ffffffff88b3e120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66501b R12: 0000000000000000 R13: ffffffff88b3e0e0 R14: 0000000000000009 R15: ffff888050936600 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555567c8848 CR3: 00000000aa4d5000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x41/0x280 lib/smp_processor_id.c:51 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_lock_held+0xba/0x110 kernel/rcu/update.c:283 task_css_set include/linux/cgroup.h:470 [inline] task_dfl_cgroup include/linux/cgroup.h:539 [inline] cgroup_account_cputime include/linux/cgroup.h:770 [inline] update_curr+0x6de/0x870 kernel/sched/fair.c:858 enqueue_entity+0xdba/0x3850 kernel/sched/fair.c:3955 enqueue_task_fair+0x12e/0x2270 kernel/sched/fair.c:5177 ttwu_activate kernel/sched/core.c:1639 [inline] ttwu_do_activate+0xce/0x1e0 kernel/sched/core.c:1698 ttwu_queue kernel/sched/core.c:1843 [inline] try_to_wake_up+0x700/0x1050 kernel/sched/core.c:2052 wake_up_worker kernel/workqueue.c:839 [inline] insert_work+0x28b/0x360 kernel/workqueue.c:1312 __queue_work+0x5cd/0x1100 kernel/workqueue.c:1464 __queue_delayed_work+0x1c6/0x270 kernel/workqueue.c:1525 mod_delayed_work_on+0xbc/0x1f0 kernel/workqueue.c:1599 kblockd_mod_delayed_work_on+0x26/0x30 block/blk-core.c:3584 blk_mq_kick_requeue_list block/blk-mq.c:757 [inline] blk_mq_add_to_requeue_list+0x30d/0x3e0 block/blk-mq.c:751 blk_flush_queue_rq+0x76/0x2f0 block/blk-flush.c:138 blk_kick_flush block/blk-flush.c:368 [inline] blk_flush_complete_seq+0x8fc/0x11d0 block/blk-flush.c:217 mq_flush_data_end_io+0x33a/0x470 block/blk-flush.c:434 __blk_mq_end_request block/blk-mq.c:533 [inline] blk_mq_end_request+0x138/0x340 block/blk-mq.c:546 lo_complete_rq+0x201/0x2d0 drivers/block/loop.c:487 __blk_mq_complete_request block/blk-mq.c:583 [inline] blk_mq_complete_request+0x472/0x660 block/blk-mq.c:620 loop_handle_cmd drivers/block/loop.c:1931 [inline] loop_queue_work+0x274/0x20c0 drivers/block/loop.c:1940 kthread_worker_fn+0x292/0x730 kernel/kthread.c:700 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415