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 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 INFO: task syz-executor131:7609 blocked for more than 140 seconds. 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 Not tainted 4.14.174-syzkaller #0 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 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 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_fill_super: No partition found (1) syz-executor131 D27824 7609 7604 0x00000004 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 Call Trace: UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) schedule+0x8d/0x1b0 kernel/sched/core.c:3428 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1f6/0x390 kernel/locking/rwsem-xadd.c:309 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x45/0xa0 kernel/locking/rwsem.c:26 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 __get_super.part.0+0x1c6/0x280 fs/super.c:678 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 __get_super include/linux/spinlock.h:317 [inline] get_super+0x2b/0x50 fs/super.c:707 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 fsync_bdev+0x14/0xd0 fs/block_dev.c:495 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 invalidate_partition+0x31/0x60 block/genhd.c:1506 drop_partitions block/partition-generic.c:442 [inline] rescan_partitions+0xde/0x850 block/partition-generic.c:515 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 __blkdev_reread_part+0x157/0x1e0 block/ioctl.c:173 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_fill_super: No partition found (1) UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 blkdev_reread_part+0x23/0x40 block/ioctl.c:193 loop_reread_partitions+0x72/0x80 drivers/block/loop.c:624 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 loop_set_status+0xbfc/0x11f0 drivers/block/loop.c:1193 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 loop_set_status64+0x92/0xe0 drivers/block/loop.c:1311 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 lo_ioctl+0x590/0x1c40 drivers/block/loop.c:1441 UDF-fs: warning (device loop9): 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 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x91d/0x17d0 block/ioctl.c:594 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 block_ioctl+0xd9/0x120 fs/block_dev.c:1881 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/0xfe0 fs/ioctl.c:684 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 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 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_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 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 RIP: 0033:0x4418a7 RSP: 002b:00007ffea806c618 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 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 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004418a7 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) RDX: 00007ffea806c6b0 RSI: 0000000000004c04 RDI: 0000000000000004 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 RBP: 0000000000000003 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 INFO: task blkid:7637 blocked for more than 140 seconds. Not tainted 4.14.174-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 blkid D29200 7637 7607 0x00000004 Call Trace: 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 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 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 loop9): udf_read_tagged: read failed, block=512, location=512 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 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: error (device loop9): 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 lo_ioctl+0x87/0x1c40 drivers/block/loop.c:1414 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x91d/0x17d0 block/ioctl.c:594 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: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 block_ioctl+0xd9/0x120 fs/block_dev.c:1881 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 UDF-fs: error (device loop7): 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 loop7): udf_read_tagged: read failed, block=512, location=512 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 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 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 RIP: 0033:0x7f6d865b8347 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 RSP: 002b:00007ffc32942ec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) RAX: ffffffffffffffda RBX: 00000000014b9030 RCX: 00007f6d865b8347 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 RDX: 0000000000000000 RSI: 0000000000005331 RDI: 0000000000000003 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 RBP: 0000000000000003 R08: 00007f6d868685a0 R09: 0000000000000008 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 INFO: task syz-executor131:7662 blocked for more than 140 seconds. Not tainted 4.14.174-syzkaller #0 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 syz-executor131 D28688 7662 7600 0x00000004 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 Call Trace: 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 loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1f6/0x390 kernel/locking/rwsem-xadd.c:309 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 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_fill_super: No partition found (1) call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x45/0xa0 kernel/locking/rwsem.c:26 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 __get_super.part.0+0x1c6/0x280 fs/super.c:678 __get_super include/linux/spinlock.h:317 [inline] get_super+0x2b/0x50 fs/super.c:707 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 fsync_bdev+0x14/0xd0 fs/block_dev.c:495 invalidate_partition+0x31/0x60 block/genhd.c:1506 drop_partitions block/partition-generic.c:442 [inline] rescan_partitions+0xde/0x850 block/partition-generic.c:515 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 __blkdev_reread_part+0x157/0x1e0 block/ioctl.c:173 blkdev_reread_part+0x23/0x40 block/ioctl.c:193 loop_reread_partitions+0x72/0x80 drivers/block/loop.c:624 loop_set_status+0xbfc/0x11f0 drivers/block/loop.c:1193 loop_set_status64+0x92/0xe0 drivers/block/loop.c:1311 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 lo_ioctl+0x590/0x1c40 drivers/block/loop.c:1441 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): 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 loop7): udf_read_tagged: read failed, block=256, location=256 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x91d/0x17d0 block/ioctl.c:594 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 block_ioctl+0xd9/0x120 fs/block_dev.c:1881 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 UDF-fs: error (device loop7): 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=256, location=256 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 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 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4418a7 RSP: 002b:00007ffea806c618 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004418a7 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 RDX: 00007ffea806c6b0 RSI: 0000000000004c04 RDI: 0000000000000004 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 RBP: 0000000000000003 R08: 0000000000000000 R09: 000000000000000a UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000002 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 INFO: task blkid:7669 blocked for more than 140 seconds. 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_fill_super: No partition found (1) Not tainted 4.14.174-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 blkid D UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 29200 7669 7613 0x00000004 Call Trace: 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 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 loop7): udf_fill_super: No partition found (1) UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 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 loop9): udf_read_tagged: read failed, block=256, location=256 print_req_error: 332 callbacks suppressed print_req_error: I/O error, dev loop9, sector 4096 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 __blkdev_get+0x131/0x10d0 fs/block_dev.c:1457 print_req_error: I/O error, dev loop7, sector 64 print_req_error: I/O error, dev loop7, sector 256 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) print_req_error: I/O error, dev loop7, sector 512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 blkdev_get+0x84/0x8a0 fs/block_dev.c:1612 print_req_error: I/O error, dev loop7, sector 64 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 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 print_req_error: I/O error, dev loop7, sector 64 print_req_error: I/O error, dev loop9, sector 64 print_req_error: I/O error, dev loop7, sector 1024 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 loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 do_dentry_open+0x732/0xe90 fs/open.c:777 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 loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) vfs_open+0x105/0x220 fs/open.c:888 do_last fs/namei.c:3428 [inline] path_openat+0x8ca/0x3c50 fs/namei.c:3569 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 do_filp_open+0x18e/0x250 fs/namei.c:3603 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 do_sys_open+0x29d/0x3f0 fs/open.c:1081 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device 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 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: warning (device loop9): udf_fill_super: No partition found (1) do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7efe8e0ad120 RSP: 002b:00007ffd62d46158 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007efe8e0ad120 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 RDX: 00007ffd62d47f40 RSI: 0000000000000000 RDI: 00007ffd62d47f40 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) R10: 0000000000000000 R11: 0000000000000246 R12: 00000000009f8030 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 Showing all locks held in the system: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 1 lock held by khungtaskd/1057: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4544 2 locks held by getty/7571: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156 2 locks held by getty/7572: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156 2 locks held by getty/7573: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156 2 locks held by getty/7574: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156 2 locks held by getty/7575: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156 2 locks held by getty/7576: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156 2 locks held by getty/7577: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 drivers/tty/n_tty.c:2156 3 locks held by syz-executor131/7609: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1c40 drivers/block/loop.c:1414 #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 #2: (&type->s_umount_key#52){.+.+}, at: [] __get_super.part.0+0x1c6/0x280 fs/super.c:678 1 lock held by blkid/7637: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1c40 drivers/block/loop.c:1414 3 locks held by syz-executor131/7662: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1c40 drivers/block/loop.c:1414 #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192 #2: (&type->s_umount_key#52){.+.+}, at: [] __get_super.part.0+0x1c6/0x280 fs/super.c:678 1 lock held by blkid/7669: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x131/0x10d0 fs/block_dev.c:1457 2 locks held by syz-executor131/15089: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x131/0x10d0 fs/block_dev.c:1457 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 drivers/block/loop.c:1634 ============================================= 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 loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device 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 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 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 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_fill_super: No partition found (1) UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) 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 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 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: error (device loop7): udf_read_tagged: read failed, block=256, location=256 NMI backtrace for cpu 0 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 4.14.174-syzkaller #0 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+0x13e/0x194 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x139/0x17e 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+0x5e2/0xb80 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: NMI backtrace for cpu 1 CPU: 1 PID: 7666 Comm: syz-executor131 Not tainted 4.14.174-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888098b6c380 task.stack: ffff8880a8388000 RIP: 0010:__sanitizer_cov_trace_pc+0x23/0x50 kernel/kcov.c:68 RSP: 0018:ffff8880a838f758 EFLAGS: 00000046 RAX: ffff888098b6c380 RBX: 0000000000000005 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff86b39ca0 RDI: ffffffff86e45780 RBP: ffffffff86e45780 R08: 0000000000000001 R09: 0000000000000001 R10: ffff888098b6cc28 R11: ffff888098b6c380 R12: 0000000000000001 R13: ffffffff86b39ca0 R14: dffffc0000000000 R15: 0000000000000000 FS: 00000000012f7880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000625208 CR3: 0000000092d3d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_local_save_flags arch/x86/include/asm/paravirt.h:774 [inline] check_preemption_disabled+0x48/0x240 lib/smp_processor_id.c:19 lookup_bh_lru fs/buffer.c:1324 [inline] __find_get_block+0xd6/0xbf0 fs/buffer.c:1353 __getblk_slow fs/buffer.c:1100 [inline] __getblk_gfp+0x17e/0x7c0 fs/buffer.c:1383 __bread_gfp+0x29/0x290 fs/buffer.c:1417 sb_bread include/linux/buffer_head.h:307 [inline] udf_tread+0xe1/0x130 fs/udf/misc.c:44 udf_read_tagged+0x3a/0x4a0 fs/udf/misc.c:210 udf_check_anchor_block+0x188/0x530 fs/udf/super.c:1810 udf_scan_anchors+0x16d/0x530 fs/udf/super.c:1850 udf_find_anchor fs/udf/super.c:1907 [inline] udf_load_vrs+0x582/0xa80 fs/udf/super.c:1972 udf_fill_super+0x715/0x14f6 fs/udf/super.c:2164 mount_bdev+0x2bc/0x370 fs/super.c:1134 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x3c0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x3c9/0x24f0 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+0x42/0xb7 RIP: 0033:0x4419b9 RSP: 002b:00007ffea806c858 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004419b9 RDX: 0000000020000200 RSI: 0000000020000180 RDI: 0000000020000080 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000402650 R14: 0000000000000000 R15: 0000000000000000 Code: 00 00 e9 be ed ff ff 90 65 48 8b 04 25 40 ee 01 00 48 85 c0 74 1a 65 8b 15 3b a6 a7 7e 81 e2 00 01 1f 00 75 0b 8b 90 50 13 00 00 <83> fa 01 74 01 c3 48 8b 34 24 48 8b 88 58 13 00 00 8b 80 54 13 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 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1)