RDX: 0000000003fffff1 RSI: 0000000020001380 RDI: 0000000000000004 RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000007 R13: 00000000004d47a0 R14: 00000000004c8d67 R15: 0000000000000016 JFS: discard option not supported on device INFO: task syz-executor4:21425 blocked for more than 140 seconds. Not tainted 4.19.0-rc2+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D25408 21425 4313 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1003 [inline] __mutex_lock+0xbf9/0x1700 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 __fdget_pos+0x1bb/0x200 fs/file.c:766 fdget_pos include/linux/file.h:70 [inline] ksys_getdents64+0x1fb/0x450 fs/readdir.c:310 __do_sys_getdents64 fs/readdir.c:333 [inline] __se_sys_getdents64 fs/readdir.c:330 [inline] __x64_sys_getdents64+0x73/0xb0 fs/readdir.c:330 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48 89 04 24 48 89 5c 24 08 e8 fd a8 fb ff 48 8b 44 24 40 48 <8b> 4c 24 48 48 8b 54 24 38 4c 8b 54 24 18 e9 ee fe ff ff 48 89 74 RSP: 002b:00007efdb0a12c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007efdb0a136d4 RCX: 0000000000457099 RDX: 00000000000000e3 RSI: 0000000020000640 RDI: 0000000000000005 RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cc3b8 R14: 00000000004c3823 R15: 0000000000000002 Showing all locks held in the system: 1 lock held by khungtaskd/793: #0: 00000000f4c632ad (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4436 2 locks held by rsyslogd/4172: #0: 00000000e8b1883f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 #1: 000000006dc68bb1 (&rq->lock){-.-.}, at: syslog_print kernel/printk/printk.c:1306 [inline] #1: 000000006dc68bb1 (&rq->lock){-.-.}, at: do_syslog+0xc4e/0x16d0 kernel/printk/printk.c:1466 2 locks held by getty/4262: #0: 00000000027ca2a0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000009ad998a4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4263: #0: 00000000dd9c9575 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000002cf02fa4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4264: #0: 0000000048f75f2f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000b694f38c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4265: #0: 000000001037cde7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000000c7fddcd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4266: #0: 000000007b2fdb88 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000005bae0924 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4267: #0: 0000000018b878c2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000c577a537 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4268: #0: 00000000c733cbb2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000f7fc4a4e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by syz-executor4/21396: #0: 00000000581025f6 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 #1: 000000009aa15fa0 (&sb->s_type->i_mutex_key#29){++++}, at: iterate_dir+0xce/0x5d0 fs/readdir.c:41 1 lock held by syz-executor4/21425: #0: 00000000581025f6 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 793 Comm: khungtaskd Not tainted 4.19.0-rc2+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb39/0x1040 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.276 msecs NMI backtrace for cpu 0 CPU: 0 PID: 2170 Comm: jbd2/sda1-8 Not tainted 4.19.0-rc2+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:iowrite16+0x12/0x90 lib/iomap.c:119 Code: 5d 87 e8 61 fd ff ff e8 5c 69 08 fe 5b 41 5c 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 41 54 41 89 fc 53 48 89 f3 e8 3e 69 08 fe <48> 89 de bf ff ff 03 00 e8 61 6a 08 fe 48 81 fb ff ff 03 00 76 13 RSP: 0018:ffff8801ccf6d6b8 EFLAGS: 00000293 RAX: ffff8801ccf64040 RBX: 000000000001c010 RCX: ffffffff83ade44d RDX: 0000000000000000 RSI: ffffffff83746632 RDI: 0000000000000002 RBP: ffff8801ccf6d6c8 R08: ffff8801ccf64040 R09: 0000000000000006 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: 0000000000000001 R15: 00000000d3575001 FS: 0000000000000000(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc6d88eed33 CR3: 00000001cfd44000 CR4: 00000000001406f0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: vp_notify+0x5a/0x80 drivers/virtio/virtio_pci_common.c:48 virtqueue_notify+0x8c/0x110 drivers/virtio/virtio_ring.c:600 virtscsi_kick_cmd+0xff/0x130 drivers/scsi/virtio_scsi.c:481 virtscsi_queuecommand+0x98a/0xeb0 drivers/scsi/virtio_scsi.c:569 scsi_dispatch_cmd+0x3ea/0xc00 drivers/scsi/scsi_lib.c:1815 scsi_queue_rq+0x154c/0x1ef0 drivers/scsi/scsi_lib.c:2118 blk_mq_dispatch_rq_list+0xf8f/0x24e0 block/blk-mq.c:1175 blk_mq_do_dispatch_sched+0x24c/0x580 block/blk-mq-sched.c:107 blk_mq_sched_dispatch_requests+0x62d/0x9b0 block/blk-mq-sched.c:203 __blk_mq_run_hw_queue+0x15e/0x210 block/blk-mq.c:1297 __blk_mq_delay_run_hw_queue+0x488/0x520 block/blk-mq.c:1365 blk_mq_run_hw_queue+0x1cd/0x390 block/blk-mq.c:1402 blk_mq_sched_insert_requests+0x31e/0x460 block/blk-mq-sched.c:422 blk_mq_flush_plug_list+0xa81/0x1080 block/blk-mq.c:1652 blk_flush_plug_list+0x1c7/0x9a0 block/blk-core.c:3697 blk_finish_plug+0x58/0xa2 block/blk-core.c:3754 jbd2_journal_commit_transaction+0x43ea/0x884d fs/jbd2/commit.c:775 kjournald2+0x274/0xb50 fs/jbd2/journal.c:229 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413