UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 INFO: task syz-executor179:8425 blocked for more than 140 seconds. Not tainted 4.14.212-syzkaller #0 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop1): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 4096 failed syz-executor179 D29920 8425 8026 0x00000004 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x343/0x6d0 kernel/locking/rwsem-xadd.c:617 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 grab_super+0x55/0x140 fs/super.c:373 UDF-fs: Scanning with blocksize 512 failed 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: error (device loop1): udf_read_tagged: read failed, block=256, location=256 sget_userns+0x2b1/0xc10 fs/super.c:504 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 sget+0xd1/0x110 fs/super.c:572 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found mount_bdev+0xcd/0x360 fs/super.c:1107 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop9): udf_load_vrs: No anchor found mount_fs+0x92/0x2a0 fs/super.c:1237 UDF-fs: Scanning with blocksize 4096 failed vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: warning (device loop11): udf_load_vrs: No anchor found print_req_error: 269 callbacks suppressed print_req_error: I/O error, dev loop7, sector 512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found print_req_error: I/O error, dev loop11, sector 64 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 512 failed print_req_error: I/O error, dev loop11, sector 1024 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 print_req_error: I/O error, dev loop7, sector 64 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 print_req_error: I/O error, dev loop7, sector 512 print_req_error: I/O error, dev loop11, sector 2048 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop1): udf_load_vrs: No anchor found print_req_error: I/O error, dev loop7, sector 1024 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 UDF-fs: Scanning with blocksize 4096 failed print_req_error: I/O error, dev loop9, sector 64 print_req_error: I/O error, dev loop9, sector 256 UDF-fs: warning (device loop1): udf_fill_super: No partition found (1) 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 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found entry_SYSCALL_64_after_hwframe+0x46/0xbb UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 RIP: 0033:0x44af29 print_req_error: I/O error, dev loop9, sector 512 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 RSP: 002b:00007f6cf52f7ce8 EFLAGS: 00000246 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 ORIG_RAX: 00000000000000a5 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044af29 UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 512 failed RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c UDF-fs: Scanning with blocksize 4096 failed R13: 00007ffd683297ef R14: 00007f6cf52f89c0 R15: 0000000000000001 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 Showing all locks held in the system: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 1 lock held by khungtaskd/1531: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 2 locks held by syz-executor179/8425: #0: (&bdev->bd_fsfreeze_mutex){+.+.}, at: [] mount_bdev+0x71/0x360 fs/super.c:1101 #1: (&type->s_umount_key#47){+.+.}, at: [] grab_super+0x55/0x140 fs/super.c:373 ============================================= UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 NMI backtrace for cpu 0 CPU: 0 PID: 1531 Comm: khungtaskd Not tainted 4.14.212-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 Sending NMI from CPU 0 to CPUs 1: UDF-fs: warning (device loop1): udf_load_vrs: No anchor found NMI backtrace for cpu 1 CPU: 1 PID: 15997 Comm: syz-executor179 Not tainted 4.14.212-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809c0ee400 task.stack: ffff88809e758000 RIP: 0010:__lock_release kernel/locking/lockdep.c:3744 [inline] RIP: 0010:lock_release+0x194/0x870 kernel/locking/lockdep.c:4017 RSP: 0018:ffff8880ba507ba8 EFLAGS: 00000006 RAX: 0000000000000003 RBX: 1ffff110174a0f78 RCX: 1ffffffff1279f60 RDX: 0000000000000004 RSI: 0000000000000002 RDI: ffff88809c0eec84 RBP: ffffffff88f77640 R08: 0000000000000000 R09: 00000000000a4012 R10: 0000000000000000 R11: ffff88809c0ee400 R12: ffffffff8141acaa R13: ffff88809c0ee400 R14: ffff88809c0ee400 R15: ffff88809c0ee400 FS: 00007f6cf52f8700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc7c167c20 CR3: 00000000b4b6a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: update_curr+0x2d0/0x670 kernel/sched/fair.c:856 enqueue_entity+0xd33/0x3980 kernel/sched/fair.c:3712 enqueue_task_fair+0xb8/0x1330 kernel/sched/fair.c:4912 ttwu_activate kernel/sched/core.c:1670 [inline] ttwu_do_activate+0xce/0x1e0 kernel/sched/core.c:1729 ttwu_queue kernel/sched/core.c:1874 [inline] try_to_wake_up+0x6d3/0x1100 kernel/sched/core.c:2087 hrtimer_wakeup+0x43/0x60 kernel/time/hrtimer.c:1441 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x30b/0xc80 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1685 [inline] RIP: 0010:vprintk_emit+0x549/0x620 kernel/printk/printk.c:1922 RSP: 0018:ffff88809e75f880 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10 RAX: ffff88809c0ee400 RBX: 1ffffffff11e1251 RCX: 1ffff1101381dd95 RDX: 0000000000000000 RSI: ffff88809c0eec88 RDI: 0000000000000297 RBP: ffff88809e75f8b8 R08: ffffffff8b9c4218 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000003d R13: ffff8880b2d80500 R14: 0000000000000297 R15: 0000000000000000 vprintk_func+0x58/0x152 kernel/printk/printk_safe.c:401 printk+0x9e/0xbc kernel/printk/printk.c:1996 _udf_warn+0xc9/0xe5 fs/udf/super.c:2330 udf_load_vrs.cold+0x67/0x6c fs/udf/super.c:1981 udf_fill_super+0x715/0x1676 fs/udf/super.c:2170 mount_bdev+0x2b3/0x360 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0xe53/0x2a00 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x44af29 RSP: 002b:00007f6cf52f7ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044af29 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c R13: 00007ffd683297ef R14: 00007f6cf52f89c0 R15: 0000000000000001 Code: 48 c7 c0 00 fb 3c 89 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 65 4c 8b 34 25 80 df 01 00 <38> d0 7c 08 84 d2 0f 85 c8 05 00 00 44 8b 0d b9 19 fa 07 45 85 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 512 failed 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 loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop1): udf_load_vrs: No anchor found