UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 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 loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found INFO: task syz-executor443:8144 blocked for more than 140 seconds. Not tainted 5.0.0-rc5 #60 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 2048 failed "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 syz-executor443 D29136 8144 7907 0x00000004 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 loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop9): 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 4096 failed Call Trace: 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: warning (device loop11): udf_load_vrs: No anchor found context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found kobject: 'loop4' (000000003db26434): kobject_uevent_env UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) kobject: 'loop4' (000000003db26434): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 schedule+0x92/0x180 kernel/sched/core.c:3529 __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 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) call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:72 grab_super+0xaf/0x2c0 fs/super.c:384 sget_userns+0x35a/0xd30 fs/super.c:512 sget+0x10c/0x150 fs/super.c:571 mount_bdev+0xff/0x3c0 fs/super.c:1132 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:2847 ksys_mount+0xdb/0x150 fs/namespace.c:3063 __do_sys_mount fs/namespace.c:3077 [inline] __se_sys_mount fs/namespace.c:3074 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3074 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44a819 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:00007fdeb325fdb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044a819 RDX: 0000000020000100 RSI: 0000000020000080 RDI: 0000000020000040 RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c R13: 00007ffd5999ef4f R14: 00007fdeb32609c0 R15: 20c49ba5e353f7cf Showing all locks held in the system: 1 lock held by khungtaskd/1040: #0: 0000000008a4dad3 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4389 1 lock held by rsyslogd/7757: #0: 0000000032d8a754 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:795 2 locks held by getty/7879: #0: 00000000a19bcb25 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000001073d0a2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7880: #0: 00000000d57f44ee (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000004962ef4e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7881: #0: 0000000011968d77 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000008270ce2c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7882: #0: 0000000050bae187 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000115f03b0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7883: #0: 00000000dd13dcd5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000417f6f05 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7884: #0: 000000005d068136 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000f27010b3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7885: #0: 000000009ab3e198 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000f463bb72 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by syz-executor443/8028: 2 locks held by syz-executor443/8127: 2 locks held by syz-executor443/8144: #0: 00000000f4d95f51 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x93/0x3c0 fs/super.c:1126 #1: 0000000007b3f53f (&type->s_umount_key#52){+.+.}, at: grab_super+0xaf/0x2c0 fs/super.c:384 1 lock held by syz-executor443/8350: 2 locks held by syz-executor443/11785: #0: 00000000762cad19 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x810 fs/block_dev.c:1814 #1: 00000000d4f1d73e (loop_ctl_mutex){+.+.}, at: lo_release+0x1f/0x200 drivers/block/loop.c:1741 2 locks held by syz-executor443/11788: #0: 00000000723cc3e9 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x810 fs/block_dev.c:1814 #1: 00000000d4f1d73e (loop_ctl_mutex){+.+.}, at: lo_release+0x1f/0x200 drivers/block/loop.c:1741 2 locks held by syz-executor443/11794: #0: 000000000b3bf3e7 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x810 fs/block_dev.c:1814 #1: 00000000d4f1d73e (loop_ctl_mutex){+.+.}, at: lo_release+0x1f/0x200 drivers/block/loop.c:1741 1 lock held by blkid/11798: #0: 000000000b3bf3e7 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1660 fs/block_dev.c:1494 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc5 #60 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 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 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 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7909 Comm: syz-executor443 Not tainted 5.0.0-rc5 #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:write_comp_data+0x9/0x70 kernel/kcov.c:122 Code: 12 00 00 8b 80 dc 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 40 ee 01 00 <65> 8b 05 50 12 92 7e a9 00 01 1f 00 75 51 41 8b 80 d8 12 00 00 83 RSP: 0018:ffff8880a4e3fec8 EFLAGS: 00000046 RAX: ffff8880a86fe100 RBX: 0000000000000001 RCX: ffffffff817542f6 RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff8880a4e3fed0 R08: ffff8880a86fe100 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a4e3ff58 R13: ffffffff88928200 R14: 0000000000000000 R15: 0000000000000000 FS: 00000000010af880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd5999f030 CR3: 000000009eec2000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_on+0x26/0x230 kernel/trace/trace_preemptirq.c:23 do_syscall_64+0x26/0x610 arch/x86/entry/common.c:277 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x405c7a Code: c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 8b 05 be ce 2d 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d0 ff ff ff f7 RSP: 002b:00007ffd5999efc8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000107af2 RCX: 0000000000405c7a RDX: 0000000040000001 RSI: 00007ffd5999efe0 RDI: ffffffffffffffff RBP: 0000000000002e03 R08: 0000000000001ee5 R09: 00000000010af880 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000088 R13: 0000000000407880 R14: 0000000000000000 R15: 0000000000000000