UDF-fs: warning (device loop1): 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 loop1): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 INFO: task syz-executor.5:7482 blocked for more than 140 seconds. Not tainted 4.14.130 #24 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D29624 7482 7158 0x00000004 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1f6/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x49/0xb0 kernel/locking/rwsem.c:26 iterate_supers+0xe1/0x250 fs/super.c:611 sys_sync+0x8a/0x130 fs/sync.c:114 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f7d44e85c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 000000000075bf28 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7d44e866d4 R13: 00000000004c5f90 R14: 00000000004dec00 R15: 00000000ffffffff INFO: task syz-executor.5:7485 blocked for more than 140 seconds. Not tainted 4.14.130 #24 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27712 7485 7158 0x00000004 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1f6/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x49/0xb0 kernel/locking/rwsem.c:26 iterate_supers+0xe1/0x250 fs/super.c:611 sys_sync+0x7a/0x130 fs/sync.c:113 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f7d44e64c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 000000000075bfd0 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7d44e656d4 R13: 00000000004c5f90 R14: 00000000004dec00 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1009: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/6991: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xab/0xd0 fs/file.c:769 2 locks held by getty/7113: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7114: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7115: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7116: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7117: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7118: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7119: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.5/7482: #0: (&type->s_umount_key#58){++++}, at: [] iterate_supers+0xe1/0x250 fs/super.c:611 1 lock held by syz-executor.5/7485: #0: (&type->s_umount_key#58){++++}, at: [] iterate_supers+0xe1/0x250 fs/super.c:611 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1009 Comm: khungtaskd Not tainted 4.14.130 #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x141/0x189 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:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5e7/0xb90 kernel/hung_task.c:274 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7471 Comm: syz-executor.0 Not tainted 4.14.130 #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808f41a6c0 task.stack: ffff888060868000 RIP: 0010:__sanitizer_cov_trace_pc+0x23/0x60 kernel/kcov.c:68 RSP: 0000:ffff88806086f630 EFLAGS: 00000246 RAX: ffff88808f41a6c0 RBX: ffffea000228cf80 RCX: ffffc9000603e000 RDX: 0000000000000001 RSI: ffffffff816fc104 RDI: 0000000000000286 RBP: ffff88806086f690 R08: 0000000000000000 R09: ffff88808f41af88 R10: ffff88808f41af68 R11: ffff88808f41a6c0 R12: ffff8880736bb8b0 R13: ffffea000228cf9c R14: dffffc0000000000 R15: ffffea000228cf80 FS: 00007f2477421700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f14cc3e9140 CR3: 0000000098af1000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pagecache_get_page+0x4a/0x750 mm/filemap.c:1442 find_get_page_flags include/linux/pagemap.h:282 [inline] __find_get_block_slow fs/buffer.c:214 [inline] __find_get_block fs/buffer.c:1357 [inline] __find_get_block+0x455/0xb10 fs/buffer.c:1351 __getblk_slow fs/buffer.c:1100 [inline] __getblk_gfp+0x18b/0x710 fs/buffer.c:1383 __bread_gfp+0x2e/0x290 fs/buffer.c:1417 sb_bread include/linux/buffer_head.h:307 [inline] udf_tread+0xe8/0x130 fs/udf/misc.c:44 udf_read_tagged+0x40/0x4b0 fs/udf/misc.c:210 udf_check_anchor_block+0x19b/0x580 fs/udf/super.c:1810 udf_scan_anchors+0x352/0x5a0 fs/udf/super.c:1872 udf_find_anchor fs/udf/super.c:1907 [inline] udf_load_vrs+0x5c4/0xae0 fs/udf/super.c:1972 udf_fill_super+0x727/0x157f fs/udf/super.c:2164 mount_bdev+0x2be/0x370 fs/super.c:1134 udf_mount+0x35/0x40 fs/udf/super.c:132 mount_fs+0x97/0x2a1 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007f2477420c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459519 RDX: 00000000200001c0 RSI: 0000000020000000 RDI: 0000000020000200 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f24774216d4 R13: 00000000004c595e R14: 00000000004d9fe0 R15: 00000000ffffffff Code: 00 00 00 e9 2f ec ff ff 65 48 8b 04 25 40 ee 01 00 48 85 c0 74 1a 65 8b 15 3b 46 a5 7e 81 e2 00 01 1f 00 75 0b 8b 90 c8 12 00 00 <83> fa 01 74 01 c3 55 48 89 e5 48 8b 75 08 48 8b 88 d0 12 00 00