UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop2): udf_load_vrs: No anchor found UDF-fs: warning (device loop1): udf_load_vrs: No anchor found INFO: task syz-executor.3:9940 blocked for more than 140 seconds. UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: warning (device loop4): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 2048 failed Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27736 9940 8145 0x00000004 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop5): udf_load_vrs: No VRS found UDF-fs: warning (device loop1): udf_load_vrs: No VRS found UDF-fs: warning (device loop2): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop2): udf_load_vrs: No VRS found Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 UDF-fs: Scanning with blocksize 4096 failed schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1016 [inline] __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078 UDF-fs: error (device loop4): udf_process_sequence: Primary Volume Descriptor not found! netlink: 108 bytes leftover after parsing attributes in process `syz-executor.3'. UDF-fs: error (device loop1): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: error (device loop4): udf_process_sequence: Primary Volume Descriptor not found! pipe_lock_nested fs/pipe.c:77 [inline] pipe_lock fs/pipe.c:85 [inline] pipe_wait+0x1bd/0x1e0 fs/pipe.c:133 UDF-fs: error (device loop1): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: error (device loop2): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop5): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: error (device loop2): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: error (device loop5): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 512 failed erofs: read_super, device -> /dev/loop3 UDF-fs: Scanning with blocksize 512 failed erofs: options -> UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: warning (device loop2): udf_load_vrs: No anchor found erofs: cannot find valid erofs superblock UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed pipe_write+0x5c3/0xf80 fs/pipe.c:500 UDF-fs: Scanning with blocksize 1024 failed call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop2): udf_load_vrs: No anchor found UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: warning (device loop5): udf_load_vrs: No anchor found vfs_write+0x1f3/0x540 fs/read_write.c:549 UDF-fs: Scanning with blocksize 2048 failed ksys_write+0x12b/0x2a0 fs/read_write.c:599 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop2): udf_load_vrs: No VRS found UDF-fs: warning (device loop4): udf_load_vrs: No VRS found UDF-fs: warning (device loop5): udf_load_vrs: No VRS found UDF-fs: warning (device loop1): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 4096 failed do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 UDF-fs: Scanning with blocksize 4096 failed entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fa609cf2209 Code: Bad RIP value. RSP: 002b:00007fa608667168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa609e04f60 RCX: 00007fa609cf2209 RDX: 00000000fffffecc RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007fa609d4c161 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef0d1373f R14: 00007fa608667300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by ksoftirqd/1/18: UDF-fs: error (device loop1): udf_process_sequence: Primary Volume Descriptor not found! 1 lock held by khungtaskd/1570: UDF-fs: error (device loop5): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: error (device loop4): udf_process_sequence: Primary Volume Descriptor not found! #0: 0000000079877d6e (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 UDF-fs: error (device loop1): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop5): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: error (device loop2): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop4): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 512 failed 1 lock held by systemd-udevd/4698: 1 lock held by in:imklog/7810: UDF-fs: error (device loop2): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: warning (device loop4): udf_load_vrs: No anchor found #0: 000000004db756bc (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 512 failed 3 locks held by kworker/u4:6/8083: UDF-fs: warning (device loop5): udf_load_vrs: No VRS found UDF-fs: warning (device loop1): udf_load_vrs: No VRS found 1 lock held by syz-executor.3/9940: UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: warning (device loop2): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 4096 failed #0: 000000005eb7edea (&pipe->mutex/1){+.+.}, at: pipe_lock_nested fs/pipe.c:77 [inline] #0: 000000005eb7edea (&pipe->mutex/1){+.+.}, at: pipe_lock fs/pipe.c:85 [inline] #0: 000000005eb7edea (&pipe->mutex/1){+.+.}, at: pipe_wait+0x1bd/0x1e0 fs/pipe.c:133 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 1024 failed 2 locks held by syz-executor.3/9949: UDF-fs: warning (device loop4): udf_load_vrs: No VRS found 1 lock held by syz-executor.1/14928: 2 locks held by syz-executor.2/14936: UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop2): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed 1 lock held by syz-executor.4/14933: #0: 00000000454dd5cf (loop_ctl_mutex){+.+.}, at: __loop_clr_fd+0x88/0xe50 drivers/block/loop.c:1080 UDF-fs: warning (device loop2): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed 1 lock held by syz-executor.0/14968: #0: 000000007f69ecaa (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 000000007f69ecaa (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 1 lock held by syz-executor.1/14967: netlink: 108 bytes leftover after parsing attributes in process `syz-executor.3'. UDF-fs: error (device loop5): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: error (device loop5): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: error (device loop1): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: error (device loop1): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: Scanning with blocksize 512 failed 1 lock held by syz-executor.5/14969: 3 locks held by syz-executor.4/14983: UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop4): udf_process_sequence: Primary Volume Descriptor not found! 2 locks held by syz-executor.3/14988: UDF-fs: warning (device loop5): udf_load_vrs: No anchor found 2 locks held by syz-executor.0/14990: UDF-fs: error (device loop2): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop4): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: warning (device loop1): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed #0: 00000000e2efaac5 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 00000000e2efaac5 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 0000000079877d6e (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 0000000079877d6e (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14981 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x50 kernel/kcov.c:101 Code: ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 <65> 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 RSP: 0018:ffff8880363efa68 EFLAGS: 00000006 RAX: ffff888090f8a080 RBX: 0000000000000003 RCX: ffffffff83771e23 RDX: 0000000000000003 RSI: ffffffff83771e2c RDI: 0000000000000005 RBP: ffffffff88b3e120 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff88b3e0e0 R14: ffff8880363e8000 R15: ffff8880ba02b0c0 FS: 0000555556c7f400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559e0114e6f0 CR3: 00000000991a7000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x3c/0x280 lib/smp_processor_id.c:25 rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1078 [inline] rcu_lockdep_current_cpu_online+0xb2/0x1b0 kernel/rcu/tree.c:1068 rcu_read_lock_sched_held+0xd3/0x1d0 kernel/rcu/update.c:115 trace_rcu_utilization include/trace/events/rcu.h:21 [inline] rcu_note_context_switch+0xc77/0x1690 kernel/rcu/tree.c:435 __schedule+0x1f1/0x2040 kernel/sched/core.c:3445 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x264/0x6c0 kernel/time/hrtimer.c:1755 hrtimer_nanosleep+0x24d/0x570 kernel/time/hrtimer.c:1809 common_nsleep+0x23/0x30 kernel/time/posix-timers.c:1204 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1231 [inline] __se_sys_clock_nanosleep+0x261/0x360 kernel/time/posix-timers.c:1209 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f4449e24f31 Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 aa e7 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 e3 e7 ff ff 48 8b 04 24 eb 97 66 2e 0f 1f RSP: 002b:00007fff18ee2890 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: ffffffffffffffda RBX: 00007f4449f12f60 RCX: 00007f4449e24f31 RDX: 00007fff18ee28d0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f4449f14960 R08: 0000000000000000 R09: 0000018f06ddd52f R10: 0000000000000000 R11: 0000000000000293 R12: 000000000017bb3e R13: 00007fff18ee29e0 R14: 00007fff18ee2a00 R15: 0000000000000064 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: warning (device loop5): udf_load_vrs: No anchor found UDF-fs: error (device loop2): udf_process_sequence: Primary Volume Descriptor not found! UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop5): udf_load_vrs: No VRS found UDF-fs: Scanning with blocksize 4096 failed