UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) INFO: task syz-executor592:7747 blocked for more than 140 seconds. UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 Not tainted 5.0.0-rc8+ #89 UDF-fs: Scanning with blocksize 2048 failed "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (0000000005f4e1a1): kobject_uevent_env kobject: 'loop4' (0000000005f4e1a1): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 syz-executor592 D29424 7747 7590 0x00000004 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found Call Trace: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) schedule+0x92/0x180 kernel/sched/core.c:3529 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:584 [inline] rwsem_down_write_failed+0x774/0xc30 kernel/locking/rwsem-xadd.c:613 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:72 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 grab_super+0xaf/0x2c0 fs/super.c:384 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found sget_userns+0x35a/0xd30 fs/super.c:512 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 sget+0x10c/0x150 fs/super.c:571 mount_bdev+0xff/0x3c0 fs/super.c:1132 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found udf_mount+0x35/0x40 fs/udf/super.c:131 UDF-fs: Scanning with blocksize 2048 failed mount_fs+0x106/0x3ff fs/super.c:1258 vfs_kern_mount.part.0+0x6f/0x410 fs/namespace.c:959 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 vfs_kern_mount fs/namespace.c:949 [inline] do_new_mount fs/namespace.c:2513 [inline] do_mount+0x581/0x2d30 fs/namespace.c:2845 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) ksys_mount+0xdb/0x150 fs/namespace.c:3061 __do_sys_mount fs/namespace.c:3075 [inline] __se_sys_mount fs/namespace.c:3072 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3072 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44a7f9 Code: 7d cb 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 4b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb609207db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044a7f9 RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000020000040 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 R13: 00007ffde6c5834f R14: 00007fb6092089c0 R15: 20c49ba5e353f7cf Showing all locks held in the system: UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 1 lock held by khungtaskd/1040: UDF-fs: warning (device loop11): udf_load_vrs: No anchor found #0: 000000007f2dab95 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4389 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) 3 locks held by rs:main Q:Reg/7468: #0: 00000000569bc843 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1149 [inline] #0: 00000000569bc843 (&rq->lock){-.-.}, at: __schedule+0x1fc/0x1cc0 kernel/sched/core.c:3423 #1: 000000007f2dab95 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000007f2dab95 (rcu_read_lock){....}, at: update_curr+0x2ce/0x8a0 kernel/sched/fair.c:829 #2: 000000004b6edd53 (&sb->s_type->i_mutex_key#10){+.+.}, at: inode_trylock include/linux/fs.h:777 [inline] #2: 000000004b6edd53 (&sb->s_type->i_mutex_key#10){+.+.}, at: ext4_file_write_iter+0x250/0x1160 fs/ext4/file.c:232 1 lock held by rsyslogd/7470: #0: 00000000395e7479 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:795 2 locks held by getty/7560: #0: 0000000077b20050 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ae93f8b5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7561: #0: 0000000061c75385 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000003f191fd1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7562: #0: 0000000083e573d9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000258e4c67 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7563: #0: 000000000a0719af (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000fed142e7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7564: #0: 0000000083249431 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000096ee9d72 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7565: #0: 000000000b96e31f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a6340264 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7566: #0: 000000007f466ec6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000acdf8d58 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by syz-executor592/7603: 1 lock held by syz-executor592/7612: 1 lock held by syz-executor592/7731: 2 locks held by syz-executor592/7747: #0: 00000000b75bc8b6 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x93/0x3c0 fs/super.c:1126 #1: 0000000040855554 (&type->s_umount_key#39){+.+.}, at: grab_super+0xaf/0x2c0 fs/super.c:384 2 locks held by syz-executor592/11094: #0: 000000005f45f890 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x810 fs/block_dev.c:1814 #1: 00000000ae778557 (loop_ctl_mutex){+.+.}, at: lo_release+0x1f/0x200 drivers/block/loop.c:1741 2 locks held by syz-executor592/11098: #0: 0000000051809fe3 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x810 fs/block_dev.c:1814 #1: 00000000ae778557 (loop_ctl_mutex){+.+.}, at: lo_release+0x1f/0x200 drivers/block/loop.c:1741 2 locks held by blkid/11101: #0: 0000000032e3c2f7 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x810 fs/block_dev.c:1814 #1: 00000000ae778557 (loop_ctl_mutex){+.+.}, at: __loop_clr_fd+0x88/0xc90 drivers/block/loop.c:1046 1 lock held by syz-executor592/11105: #0: 0000000032e3c2f7 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1660 fs/block_dev.c:1494 1 lock held by syz-executor592/11106: #0: 0000000032e3c2f7 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1660 fs/block_dev.c:1494 ============================================= kobject: 'loop4' (0000000005f4e1a1): kobject_uevent_env kobject: 'loop4' (0000000005f4e1a1): fill_kobj_path: path = '/devices/virtual/block/loop4' NMI backtrace for cpu 1 kobject: 'loop3' (00000000a2698239): kobject_uevent_env CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc8+ #89 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 kobject: 'loop3' (00000000a2698239): fill_kobj_path: path = '/devices/virtual/block/loop3' nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 kobject: 'loop5' (00000000b609402e): kobject_uevent_env ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.293 msecs NMI backtrace for cpu 0 CPU: 0 PID: 11110 Comm: syz-executor592 Not tainted 5.0.0-rc8+ #89 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_preemption_disabled+0x56/0x290 lib/smp_processor_id.c:52 Code: e3 ff ff ff 7f 31 ff 89 de e8 76 dd 44 fe 85 db 74 1c e8 ed db 44 fe e8 e8 db 44 fe 44 89 e8 48 83 c4 08 5b 41 5c 41 5d 41 5e <41> 5f 5d c3 e8 d1 db 44 fe 48 c7 c0 e8 82 92 88 48 ba 00 00 00 00 RSP: 0018:ffff8880ae807b30 EFLAGS: 00000092 RAX: 0000000000000000 RBX: 000000000002ddc0 RCX: ffffffff832b032a RDX: 0000000000010000 RSI: ffffffff832b0338 RDI: 0000000000000005 RBP: ffff8880ae807b38 R08: ffff88808afe2200 R09: ffff88808afe2b18 R10: ffff88808afe2af8 R11: 0000000000000001 R12: ffff8880ae82d0c0 R13: ffff88808afe22d8 R14: ffff88808afe2200 R15: 000000000000289b FS: 00007fb60924a700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004c3b18 CR3: 000000009b53b000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_smp_processor_id+0x1c/0x20 lib/smp_processor_id.c:56 rcu_dynticks_curr_cpu_in_eqs+0x17/0xb0 kernel/rcu/tree.c:303 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:932 rcu_read_lock include/linux/rcupdate.h:608 [inline] cgroup_account_cputime include/linux/cgroup.h:764 [inline] update_curr+0x693/0x8a0 kernel/sched/fair.c:830 enqueue_entity+0x31b/0x1800 kernel/sched/fair.c:3880 enqueue_task_fair+0x160/0xa80 kernel/sched/fair.c:5133 enqueue_task kernel/sched/core.c:743 [inline] activate_task+0x11d/0x470 kernel/sched/core.c:764 ttwu_activate kernel/sched/core.c:1656 [inline] ttwu_do_activate+0xd4/0x1f0 kernel/sched/core.c:1715 ttwu_queue kernel/sched/core.c:1860 [inline] try_to_wake_up+0x821/0xff0 kernel/sched/core.c:2070 wake_up_process+0x10/0x20 kernel/sched/core.c:2142 hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1637 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1697 [inline] RIP: 0010:vprintk_emit+0x5f8/0x6d0 kernel/printk/printk.c:1930 Code: 00 48 b8 00 00 00 00 00 fc ff df 41 80 3c 06 00 0f 85 95 00 00 00 48 83 3d f4 15 38 07 00 74 29 e8 1d 72 15 00 48 89 df 57 9d <0f> 1f 44 00 00 e9 c5 fe ff ff e8 09 72 15 00 0f 0b e8 02 72 15 00 RSP: 0018:ffff88808c7974d8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88808afe2200 RBX: 0000000000000293 RCX: 1ffff110115fc554 RDX: 0000000000000000 RSI: ffffffff815a6d03 RDI: 0000000000000293 RBP: ffff88808c797520 R08: ffff88808afe2200 R09: ffff88808afe2aa0 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000053 R13: 0000000000000200 R14: 1ffffffff112505e R15: ffff8880a81f0680 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:1991 _udf_err+0xdc/0x110 fs/udf/super.c:2278 udf_read_tagged+0x49c/0x530 fs/udf/misc.c:212 udf_check_anchor_block+0x1ef/0x680 fs/udf/super.c:1775 udf_scan_anchors+0x4dd/0x680 fs/udf/super.c:1854 udf_find_anchor fs/udf/super.c:1872 [inline] udf_load_vrs+0x67f/0xc80 fs/udf/super.c:1937 udf_fill_super+0x7d8/0x16d1 fs/udf/super.c:2132 mount_bdev+0x307/0x3c0 fs/super.c:1159 udf_mount+0x35/0x40 fs/udf/super.c:131 mount_fs+0x106/0x3ff fs/super.c:1258 vfs_kern_mount.part.0+0x6f/0x410 fs/namespace.c:959 vfs_kern_mount fs/namespace.c:949 [inline] do_new_mount fs/namespace.c:2513 [inline] do_mount+0x581/0x2d30 fs/namespace.c:2845 ksys_mount+0xdb/0x150 fs/namespace.c:3061 __do_sys_mount fs/namespace.c:3075 [inline] __se_sys_mount fs/namespace.c:3072 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3072 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44a7f9 Code: 7d cb 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 4b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb609249db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 000000000044a7f9 RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000020000040 RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c R13: 00007ffde6c5834f R14: 00007fb60924a9c0 R15: 20c49ba5e353f7cf UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop5' (00000000b609402e): fill_kobj_path: path = '/devices/virtual/block/loop5' UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found kobject: 'loop4' (0000000005f4e1a1): kobject_uevent_env UDF-fs: Scanning with blocksize 512 failed kobject: 'loop4' (0000000005f4e1a1): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512