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: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 2048 failed INFO: task syz-executor813:8015 blocked for more than 140 seconds. 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 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 Not tainted 4.14.215-syzkaller #0 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 4096 failed "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) syz-executor813 D28208 8015 8013 0x00000004 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed Call Trace: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 Dev loop4: unable to read RDB block 1 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed loop4: unable to read partition table print_req_error: 326 callbacks suppressed print_req_error: I/O error, dev loop7, sector 64 print_req_error: I/O error, dev loop7, sector 2048 loop4: partition table beyond EOD, UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 print_req_error: I/O error, dev loop7, sector 4096 truncated UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 loop_reread_partitions: partition scan of loop4 () failed (rc=-5) UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed schedule+0x8d/0x1b0 kernel/sched/core.c:3428 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1e6/0x350 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 __get_super.part.0+0x271/0x390 fs/super.c:678 print_req_error: I/O error, dev loop9, sector 64 Dev loop3: unable to read RDB block 1 print_req_error: I/O error, dev loop9, sector 256 loop3: unable to read partition table UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 loop3: partition table beyond EOD, __get_super include/linux/spinlock.h:317 [inline] get_super+0x2b/0x50 fs/super.c:707 print_req_error: I/O error, dev loop9, sector 512 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 fsync_bdev+0x14/0xc0 fs/block_dev.c:495 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 truncated print_req_error: I/O error, dev loop9, sector 512 loop_reread_partitions: partition scan of loop3 () failed (rc=-5) UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 invalidate_partition+0x74/0xb0 block/genhd.c:1506 print_req_error: I/O error, dev loop9, sector 1024 drop_partitions.isra.0+0x83/0x150 block/partition-generic.c:442 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: Scanning with blocksize 1024 failed print_req_error: I/O error, dev loop9, sector 64 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 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 rescan_partitions+0xa9/0x800 block/partition-generic.c:515 UDF-fs: warning (device loop9): 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 __blkdev_reread_part+0x140/0x1d0 block/ioctl.c:173 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 blkdev_reread_part+0x23/0x40 block/ioctl.c:193 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 loop_reread_partitions drivers/block/loop.c:624 [inline] loop_set_status+0xeeb/0x12b0 drivers/block/loop.c:1193 UDF-fs: Scanning with blocksize 4096 failed loop_set_status64+0x92/0xe0 drivers/block/loop.c:1311 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 512 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: warning (device loop7): udf_load_vrs: No anchor found lo_ioctl+0x587/0x1cd0 drivers/block/loop.c:1441 UDF-fs: Scanning with blocksize 1024 failed Dev loop4: unable to read RDB block 1 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x540/0x1830 block/ioctl.c:594 loop4: unable to read partition table loop4: partition table beyond EOD, truncated UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 block_ioctl+0xd9/0x120 fs/block_dev.c:1893 loop_reread_partitions: partition scan of loop4 () failed (rc=-5) UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 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 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) UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 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 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb UDF-fs: Scanning with blocksize 512 failed RIP: 0033:0x441b87 RSP: 002b:00007ffd1896fea8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000441b87 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 RDX: 00007ffd1896ff40 RSI: 0000000000004c04 RDI: 0000000000000004 Dev loop3: unable to read RDB block 1 RBP: 00000000200002e8 R08: fe03f80fe03f80ff R09: 00007ffd18970120 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 R10: 0000000000000101 R11: 0000000000000202 R12: 0000000000000001 loop3: unable to read partition table R13: 0000000000000003 R14: 0000000000000003 R15: 0000000000000000 loop3: partition table beyond EOD, truncated INFO: task syz-executor813:8016 blocked for more than 140 seconds. UDF-fs: warning (device loop9): udf_load_vrs: No anchor found Not tainted 4.14.215-syzkaller #0 loop_reread_partitions: partition scan of loop3 () failed (rc=-5) "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: Scanning with blocksize 1024 failed syz-executor813 D28112 8016 8009 0x00000004 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 Call Trace: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed 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 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 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1e6/0x350 kernel/locking/rwsem-xadd.c:309 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 UDF-fs: Scanning with blocksize 512 failed __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) __get_super.part.0+0x271/0x390 fs/super.c:678 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 __get_super include/linux/spinlock.h:317 [inline] get_super+0x2b/0x50 fs/super.c:707 fsync_bdev+0x14/0xc0 fs/block_dev.c:495 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 invalidate_partition+0x74/0xb0 block/genhd.c:1506 drop_partitions.isra.0+0x83/0x150 block/partition-generic.c:442 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found Dev loop4: unable to read RDB block 1 loop4: unable to read partition table UDF-fs: Scanning with blocksize 1024 failed rescan_partitions+0xa9/0x800 block/partition-generic.c:515 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 __blkdev_reread_part+0x140/0x1d0 block/ioctl.c:173 loop4: partition table beyond EOD, truncated blkdev_reread_part+0x23/0x40 block/ioctl.c:193 loop_reread_partitions: partition scan of loop4 () failed (rc=-5) loop_reread_partitions drivers/block/loop.c:624 [inline] loop_set_status+0xeeb/0x12b0 drivers/block/loop.c:1193 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 loop_set_status64+0x92/0xe0 drivers/block/loop.c:1311 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 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 loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found lo_ioctl+0x587/0x1cd0 drivers/block/loop.c:1441 UDF-fs: Scanning with blocksize 4096 failed __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x540/0x1830 block/ioctl.c:594 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 block_ioctl+0xd9/0x120 fs/block_dev.c:1893 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found Dev loop3: unable to read RDB block 1 loop3: unable to read partition table loop3: partition table beyond EOD, UDF-fs: Scanning with blocksize 512 failed truncated UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 loop_reread_partitions: partition scan of loop3 () failed (rc=-5) 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 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 entry_SYSCALL_64_after_hwframe+0x46/0xbb UDF-fs: warning (device loop9): udf_load_vrs: No anchor found RIP: 0033:0x441b87 UDF-fs: Scanning with blocksize 2048 failed RSP: 002b:00007ffd1896fea8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000441b87 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 RDX: 00007ffd1896ff40 RSI: 0000000000004c04 RDI: 0000000000000004 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 RBP: 00000000200002e8 R08: fe03f80fe03f80ff R09: 00007ffd18970120 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 R10: 0000000000000101 R11: 0000000000000202 R12: 0000000000000001 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 R13: 0000000000000003 R14: 0000000000000003 R15: 0000000000000000 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found INFO: task syz-executor813:8018 blocked for more than 140 seconds. UDF-fs: warning (device loop9): udf_load_vrs: No anchor found Not tainted 4.14.215-syzkaller #0 UDF-fs: Scanning with blocksize 512 failed "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: Scanning with blocksize 4096 failed syz-executor813 D28112 8018 8008 0x80000004 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 Call Trace: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 Dev loop4: unable to read RDB block 1 loop4: unable to read partition table UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414 loop4: partition table beyond EOD, truncated UDF-fs: warning (device loop7): udf_load_vrs: No anchor found loop_reread_partitions: partition scan of loop4 () failed (rc=-5) UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x540/0x1830 block/ioctl.c:594 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) ioctl_by_bdev+0xa0/0x110 fs/block_dev.c:2078 udf_get_last_block+0x8a/0x180 fs/udf/lowlevel.c:59 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 Dev loop3: unable to read RDB block 1 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 loop3: unable to read partition table UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed loop3: partition table beyond EOD, UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 truncated UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 udf_load_vrs+0x48d/0xa90 fs/udf/super.c:1971 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found loop_reread_partitions: partition scan of loop3 () failed (rc=-5) 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 loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found udf_fill_super+0x715/0x1676 fs/udf/super.c:2170 UDF-fs: Scanning with blocksize 2048 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: warning (device loop9): udf_load_vrs: No anchor found 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) mount_bdev+0x2b3/0x360 fs/super.c:1134 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 512 failed mount_fs+0x92/0x2a0 fs/super.c:1237 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 Dev loop4: unable to read RDB block 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 loop4: unable to read partition table UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 loop4: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop4 () failed (rc=-5) UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 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 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 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 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 entry_SYSCALL_64_after_hwframe+0x46/0xbb UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 RIP: 0033:0x441c99 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found RSP: 002b:00007ffd189700e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441c99 UDF-fs: Scanning with blocksize 512 failed RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 UDF-fs: Scanning with blocksize 4096 failed R13: 00000000004028b0 R14: 0000000000000000 R15: 0000000000000000 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 INFO: task syz-executor813:8020 blocked for more than 140 seconds. UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) Not tainted 4.14.215-syzkaller #0 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: Scanning with blocksize 1024 failed syz-executor813 D28112 8020 8010 0x80000004 Call Trace: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 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: Scanning with blocksize 2048 failed Dev loop3: unable to read RDB block 1 loop3: unable to read partition table UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 loop3: partition table beyond EOD, schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found truncated UDF-fs: Scanning with blocksize 4096 failed __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) loop_reread_partitions: partition scan of loop3 () failed (rc=-5) Dev loop4: unable to read RDB block 1 lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414 loop4: unable to read partition table loop4: partition table beyond EOD, __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x540/0x1830 block/ioctl.c:594 truncated loop_reread_partitions: partition scan of loop4 () failed (rc=-5) ioctl_by_bdev+0xa0/0x110 fs/block_dev.c:2078 udf_get_last_block+0x8a/0x180 fs/udf/lowlevel.c:59 udf_load_vrs+0x48d/0xa90 fs/udf/super.c:1971 udf_fill_super+0x715/0x1676 fs/udf/super.c:2170 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 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 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+0xe53/0x2a00 fs/namespace.c:2879 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 loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed 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: warning (device loop9): udf_load_vrs: No anchor found 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 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=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3072 UDF-fs: Scanning with blocksize 2048 failed do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x441c99 RSP: 002b:00007ffd189700e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441c99 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: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 4096 failed RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 R13: 00000000004028b0 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1524: #0: Dev loop4: unable to read RDB block 1 (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by in:imklog/7711: loop4: unable to read partition table #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 fs/file.c:769 3 locks held by syz-executor813/8015: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414 #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 #2: loop4: partition table beyond EOD, (&type->s_umount_key#47){.+.+}, at: [] __get_super.part.0+0x271/0x390 fs/super.c:678 3 locks held by syz-executor813/8016: #0: UDF-fs: warning (device loop7): udf_load_vrs: No anchor found (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414 #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 #2: (&type->s_umount_key#47){.+.+}, at: [] __get_super.part.0+0x271/0x390 fs/super.c:678 2 locks held by syz-executor813/8018: UDF-fs: Scanning with blocksize 2048 failed #0: (&type->s_umount_key#46/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#46/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 #1: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414 2 locks held by syz-executor813/8020: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 #0: truncated (&type->s_umount_key#46/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] (&type->s_umount_key#46/1){+.+.}, at: [] sget_userns+0x556/0xc10 fs/super.c:516 #1: loop_reread_partitions: partition scan of loop4 () failed (rc=-5) (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 drivers/block/loop.c:1414 ============================================= NMI backtrace for cpu 0 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 CPU: 0 PID: 1524 Comm: khungtaskd Not tainted 4.14.215-syzkaller #0 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 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+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 Sending NMI from CPU 0 to CPUs 1: UDF-fs: Scanning with blocksize 4096 failed NMI backtrace for cpu 1 CPU: 1 PID: 15618 Comm: syz-executor813 Not tainted 4.14.215-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809b92c000 task.stack: ffff88809e518000 RIP: 0010:__lock_acquire+0x5f2/0x3f20 kernel/locking/lockdep.c:3452 RSP: 0018:ffff8880ba507b60 EFLAGS: 00000002 RAX: 000000000000000c RBX: 0000000000000040 RCX: 1ffff1101372591a RDX: 0000000000000008 RSI: ffff88809b92c8b0 RDI: ffff88809b92c000 RBP: ffff88809b92c8d2 R08: 0000000000000001 R09: 00000000000c402c R10: ffff88809b92c8b0 R11: ffff88809b92c000 R12: ffff88809b92c8c8 R13: 000000000000002c R14: 000000000000002c R15: ffffffff8beb5d40 FS: 0000000002642880(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7861ef7000 CR3: 00000000b4e06000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 rq_lock kernel/sched/sched.h:1741 [inline] scheduler_tick+0x90/0x2d0 kernel/sched/core.c:3030 update_process_times+0x41/0x60 kernel/time/timer.c:1596 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x92/0x200 kernel/time/tick-sched.c:1223 __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:ffff88809e51fa40 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10 RAX: ffff88809b92c000 RBX: 1ffffffff11e1251 RCX: 1ffff11013725915 RDX: 0000000000000000 RSI: ffff88809b92c888 RDI: 0000000000000297 RBP: ffff88809e51fa78 R08: ffffffff8b9c71f8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000002b R13: ffff8880b2cac340 R14: 0000000000000297 R15: 0000000000000000 vprintk_func+0x58/0x152 kernel/printk/printk_safe.c:401 printk+0x9e/0xbc kernel/printk/printk.c:1996 udf_fill_super.cold+0x1d3/0x247 fs/udf/super.c:2173 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: 0033:0x441c99 RSP: 002b:00007ffd189700e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441c99 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000214 R13: 00000000004028b0 R14: 0000000000000000 R15: 0000000000000000 Code: 03 0f 8e 92 31 00 00 41 8b b3 70 08 00 00 ba 07 00 00 00 85 f6 0f 85 65 07 00 00 4c 89 d6 4c 89 df ba 08 00 00 00 4c 89 54 24 28 <4c> 89 5c 24 20 e8 34 e3 ff ff 4c 8b 5c 24 20 85 c0 4c 8b 54 24