UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop9): 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: error (device loop7): udf_read_tagged: read failed, block=256, location=256 INFO: task syz-executor001:6948 blocked for more than 140 seconds. UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop9): udf_load_vrs: No anchor found Not tainted 4.14.139 #35 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop3' (ffff8880a49ad260): kobject_uevent_env UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 2048 failed kobject: 'loop3' (ffff8880a49ad260): fill_kobj_path: path = '/devices/virtual/block/loop3' syz-executor001 D29744 6948 6907 0x00000004 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: warning (device loop7): udf_load_vrs: No anchor found Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 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 512 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 schedule+0x92/0x1c0 kernel/sched/core.c:3427 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617 UDF-fs: error (device loop7): 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: Scanning with blocksize 4096 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop3' (ffff8880a49ad260): kobject_uevent_env UDF-fs: warning (device loop7): udf_load_vrs: No anchor found kobject: 'loop3' (ffff8880a49ad260): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env grab_super+0x5e/0x140 fs/super.c:373 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' sget_userns+0x2b0/0xc30 fs/super.c:504 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: Scanning with blocksize 2048 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 512 failed kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: error (device loop11): 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: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 sget+0xd6/0x120 fs/super.c:572 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 mount_bdev+0xd5/0x370 fs/super.c:1107 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: Scanning with blocksize 1024 failed udf_mount+0x35/0x40 fs/udf/super.c:132 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) mount_fs+0x97/0x2a1 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env 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 kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 512 failed kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 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 loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop11): 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 loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 entry_SYSCALL_64_after_hwframe+0x42/0xb7 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: Scanning with blocksize 4096 failed RIP: 0033:0x44aeb9 RSP: 002b:00007f2e95a4cce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044aeb9 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 512 failed 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 loop11): udf_read_tagged: read failed, block=256, location=256 RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 00000000200001c0 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 RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 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 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c UDF-fs: Scanning with blocksize 512 failed R13: 00007fff0110d12f R14: 00007f2e95a4d9c0 R15: 0000000000000001 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 INFO: task syz-executor001:6970 blocked for more than 140 seconds. UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 Not tainted 4.14.139 #35 UDF-fs: error (device loop7): 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: error (device loop11): udf_read_tagged: read failed, block=512, location=512 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor001 D29104 6970 6908 0x00000004 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 loop9): udf_load_vrs: No anchor found Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 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 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 loop11): udf_read_tagged: read failed, block=256, location=256 schedule+0x92/0x1c0 kernel/sched/core.c:3427 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617 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 2048 failed kobject: 'loop3' (ffff8880a49ad260): kobject_uevent_env kobject: 'loop3' (ffff8880a49ad260): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: error (device loop7): 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 loop7): udf_load_vrs: No anchor found call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env UDF-fs: Scanning with blocksize 512 failed kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' 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 loop7): udf_read_tagged: read failed, block=256, location=256 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 grab_super+0x5e/0x140 fs/super.c:373 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' UDF-fs: Scanning with blocksize 512 failed sget_userns+0x2b0/0xc30 fs/super.c:504 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 loop9): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env 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: error (device loop9): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: warning (device loop9): udf_load_vrs: No anchor found kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env sget+0xd6/0x120 fs/super.c:572 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found mount_bdev+0xd5/0x370 fs/super.c:1107 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 2048 failed udf_mount+0x35/0x40 fs/udf/super.c:132 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop3' (ffff8880a49ad260): kobject_uevent_env 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=256, location=256 mount_fs+0x97/0x2a1 fs/super.c:1237 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop3' (ffff8880a49ad260): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env 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 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env UDF-fs: warning (device loop9): udf_load_vrs: No anchor found vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) UDF-fs: warning (device loop11): udf_load_vrs: No anchor found SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' 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 loop7): udf_read_tagged: read failed, block=512, location=512 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 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=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found entry_SYSCALL_64_after_hwframe+0x42/0xb7 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 RIP: 0033:0x44aeb9 UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 RSP: 002b:00007f2e95a4cce8 EFLAGS: 00000246 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env ORIG_RAX: 00000000000000a5 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044aeb9 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' 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 RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 00000000200001c0 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 R13: 00007fff0110d12f R14: 00007f2e95a4d9c0 R15: 0000000000000001 UDF-fs: Scanning with blocksize 1024 failed 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 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 INFO: task syz-executor001:6963 blocked for more than 140 seconds. 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: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found Not tainted 4.14.139 #35 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 512 failed "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 syz-executor001 D UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 29744 6963 6906 0x00000004 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 Call Trace: UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 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 loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 4096 failed schedule+0x92/0x1c0 kernel/sched/core.c:3427 UDF-fs: Scanning with blocksize 1024 failed __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found 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 4096 failed kobject: 'loop3' (ffff8880a49ad260): kobject_uevent_env kobject: 'loop3' (ffff8880a49ad260): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) 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 kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 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 kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' 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 512 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:56 UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 grab_super+0x5e/0x140 fs/super.c:373 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 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 kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' sget_userns+0x2b0/0xc30 fs/super.c:504 UDF-fs: Scanning with blocksize 1024 failed 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=256, location=256 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 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 2048 failed sget+0xd6/0x120 fs/super.c:572 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 mount_bdev+0xd5/0x370 fs/super.c:1107 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop3' (ffff8880a49ad260): kobject_uevent_env UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) udf_mount+0x35/0x40 fs/udf/super.c:132 kobject: 'loop3' (ffff8880a49ad260): fill_kobj_path: path = '/devices/virtual/block/loop3' mount_fs+0x97/0x2a1 fs/super.c:1237 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env UDF-fs: Scanning with blocksize 2048 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: Scanning with blocksize 4096 failed UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) 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 kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' 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 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 512 failed entry_SYSCALL_64_after_hwframe+0x42/0xb7 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env RIP: 0033:0x44aeb9 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 RSP: 002b:00007f2e95a4cce8 EFLAGS: 00000246 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: error (device loop7): 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=512, location=512 ORIG_RAX: 00000000000000a5 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044aeb9 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 1024 failed RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 00000000200001c0 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop7): 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: warning (device loop7): udf_load_vrs: No anchor found R13: 00007fff0110d12f R14: 00007f2e95a4d9c0 R15: 0000000000000001 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' Showing all locks held in the system: UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 1 lock held by khungtaskd/1012: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/6755: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xab/0xd0 fs/file.c:769 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 2 locks held by getty/6879: #0: (&tty->ldisc_sem UDF-fs: warning (device loop11): udf_load_vrs: No anchor found ){++++} UDF-fs: Scanning with blocksize 2048 failed , at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.} UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 , at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6880: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found #1: UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6881: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6882: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6883: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6884: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6885: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by syz-executor001/6948: #0: (&bdev->bd_fsfreeze_mutex){+.+.}, at: [] mount_bdev+0x76/0x370 fs/super.c:1101 #1: (&type->s_umount_key#52){+.+.}, at: [] grab_super+0x5e/0x140 fs/super.c:373 2 locks held by syz-executor001/6970: #0: (&bdev->bd_fsfreeze_mutex){+.+.}, at: [] mount_bdev+0x76/0x370 fs/super.c:1101 #1: (&type->s_umount_key#52){+.+.}, at: [] grab_super+0x5e/0x140 fs/super.c:373 2 locks held by syz-executor001/6963: #0: (&bdev->bd_fsfreeze_mutex){+.+.}, at: [] mount_bdev+0x76/0x370 fs/super.c:1101 #1: (&type->s_umount_key#52){+.+.}, at: [] grab_super+0x5e/0x140 fs/super.c:373 2 locks held by syz-executor001/11395: #0: (&bdev->bd_fsfreeze_mutex){+.+.}, at: [] mount_bdev+0x76/0x370 fs/super.c:1101 #1: (&type->s_umount_key#52){+.+.}, at: [] grab_super+0x5e/0x140 fs/super.c:373 ============================================= UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 4096 failed 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: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 4096 failed kobject: 'loop3' (ffff8880a49ad260): kobject_uevent_env kobject: 'loop3' (ffff8880a49ad260): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop7): 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 kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found print_req_error: 241 callbacks suppressed print_req_error: I/O error, dev loop9, sector 64 print_req_error: I/O error, dev loop9, sector 256 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 print_req_error: I/O error, dev loop9, sector 512 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 print_req_error: I/O error, dev loop11, sector 512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed print_req_error: I/O error, dev loop9, sector 64 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 print_req_error: I/O error, dev loop9, sector 512 kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' print_req_error: I/O error, dev loop7, sector 64 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 print_req_error: I/O error, dev loop7, sector 512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 print_req_error: I/O error, dev loop7, sector 1024 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 1024 failed print_req_error: I/O error, dev loop9, sector 1024 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: Scanning with blocksize 512 failed 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: warning (device loop7): 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 2048 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 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 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) UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop5' (ffff8880a4a94aa0): kobject_uevent_env UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop5' (ffff8880a4a94aa0): fill_kobj_path: path = '/devices/virtual/block/loop5' 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: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found kobject: 'loop3' (ffff8880a49ad260): kobject_uevent_env UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 2048 failed kobject: 'loop3' (ffff8880a49ad260): fill_kobj_path: path = '/devices/virtual/block/loop3' 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 loop9): 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: 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 loop11): udf_load_vrs: No anchor found 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 UDF-fs: Scanning with blocksize 1024 failed 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 loop9): 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 loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env UDF-fs: warning (device loop7): udf_load_vrs: No anchor found kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 4096 failed kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop11): 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=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 loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop9): udf_load_vrs: No anchor found kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 1024 failed kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' 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 kobject: 'loop3' (ffff8880a49ad260): kobject_uevent_env 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=512, location=512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop3' (ffff8880a49ad260): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: warning (device loop9): 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 loop7): udf_read_tagged: read failed, block=512, location=512 NMI backtrace for cpu 1 CPU: 1 PID: 1012 Comm: khungtaskd Not tainted 4.14.139 #35 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 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 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 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 kobject: 'loop4' (ffff8880a4a421a0): kobject_uevent_env Sending NMI from CPU 1 to CPUs 0: kobject: 'loop4' (ffff8880a4a421a0): fill_kobj_path: path = '/devices/virtual/block/loop4' NMI backtrace for cpu 0 CPU: 0 PID: 11418 Comm: syz-executor001 Not tainted 4.14.139 #35 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888078130400 task.stack: ffff8880999a0000 RIP: 0010:separate_irq_context kernel/locking/lockdep.c:3103 [inline] RIP: 0010:__lock_acquire+0x6ba/0x4620 kernel/locking/lockdep.c:3478 RSP: 0018:ffff8880aee07af0 EFLAGS: 00000802 RAX: dffffc0000000000 RBX: 0000000000000085 RCX: 1ffff1100f026199 RDX: 1ffff1100f02618f RSI: ffff888078130ca8 RDI: ffffffff88cd21f0 RBP: ffff8880aee07ca0 R08: 0000000000000001 R09: ffff888078130cc8 R10: ffff888078130ca8 R11: ffff888078130400 R12: 0000000000000000 R13: 0000000000000085 R14: 0000000000000001 R15: 38c10343db3c77fa FS: 00007f2e95a6e700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000625208 CR3: 00000000a103c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3991 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:160 try_to_wake_up+0x79/0xf90 kernel/sched/core.c:1996 wake_up_process+0x10/0x20 kernel/sched/core.c:2159 hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1438 __run_hrtimer kernel/time/hrtimer.c:1220 [inline] __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1284 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1318 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline] smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1679 [inline] RIP: 0010:vprintk_emit kernel/printk/printk.c:1916 [inline] RIP: 0010:vprintk_emit+0x524/0x600 kernel/printk/printk.c:1882 RSP: 0018:ffff8880999a79b0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10 RAX: ffff888078130400 RBX: 1ffffffff0ee2a59 RCX: 1ffff1100f026194 RDX: 0000000000000000 RSI: ffff888078130c80 RDI: 0000000000000297 RBP: ffff8880999a79f0 R08: ffff888078130400 R09: ffff888078130ca0 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000005a R13: 0000000000000297 R14: ffff8880a87885c0 R15: 0000000000000000 vprintk_default+0x28/0x30 kernel/printk/printk.c:1957 vprintk_func+0x5d/0x159 kernel/printk/printk_safe.c:401 printk+0x9e/0xbc kernel/printk/printk.c:1990 fill_kobj_path lib/kobject.c:134 [inline] kobject_get_path.cold+0x38/0x47 lib/kobject.c:157 kobject_uevent_env+0x39c/0xc23 lib/kobject_uevent.c:402 kobject_uevent+0x20/0x26 lib/kobject_uevent.c:553 loop_set_fd drivers/block/loop.c:938 [inline] lo_ioctl+0x11e7/0x1ce0 drivers/block/loop.c:1407 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x96b/0x1860 block/ioctl.c:594 block_ioctl+0xde/0x120 fs/block_dev.c:1881 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x44ada7 RSP: 002b:00007f2e95a6db38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000008100000 RCX: 000000000044ada7 RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004 RBP: 00000000006dcc30 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000246 R12: 00000000006dcc3c R13: 00007fff0110d12f R14: 00007f2e95a6e9c0 R15: 0000000000000002 Code: df 4c 89 d2 48 c1 ea 03 80 3c 02 00 0f 85 ae 29 00 00 48 8b 94 24 88 00 00 00 4d 89 3a 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 5f 29 00 00 41 8b 83 78 08 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop11): 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: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found