isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 print_req_error: I/O error, dev loop1, sector 64 isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 INFO: task syz-executor657:6947 blocked for more than 140 seconds. Not tainted 4.14.138 #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor657 D28528 6947 6862 0x00000004 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env Call Trace: kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1f6/0x390 kernel/locking/rwsem-xadd.c:309 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x49/0xb0 kernel/locking/rwsem.c:26 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' __get_super.part.0+0x1cb/0x280 fs/super.c:678 __get_super include/linux/spinlock.h:317 [inline] get_super+0x2e/0x50 fs/super.c:707 fsync_bdev+0x19/0xd0 fs/block_dev.c:495 invalidate_partition+0x36/0x60 block/genhd.c:1506 drop_partitions block/partition-generic.c:442 [inline] rescan_partitions+0xe3/0x860 block/partition-generic.c:515 __blkdev_reread_part+0x15c/0x1e0 block/ioctl.c:173 blkdev_reread_part+0x27/0x40 block/ioctl.c:193 loop_reread_partitions+0x7c/0x90 drivers/block/loop.c:614 loop_set_status+0xc25/0x11f0 drivers/block/loop.c:1183 loop_set_status64+0xa6/0xf0 drivers/block/loop.c:1301 lo_ioctl+0x5c1/0x1ce0 drivers/block/loop.c:1431 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x96b/0x1860 block/ioctl.c:594 print_req_error: I/O error, dev loop9, sector 64 block_ioctl+0xde/0x120 fs/block_dev.c:1881 isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 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: 0033:0x441947 RSP: 002b:00007ffd2208bb98 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441947 kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' RDX: 00007ffd2208bc30 RSI: 0000000000004c04 RDI: 0000000000000004 RBP: 0000000000000003 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000003 R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 INFO: task blkid:6948 blocked for more than 140 seconds. Not tainted 4.14.138 #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D29040 6948 6879 0x00000004 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env Call Trace: kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 print_req_error: I/O error, dev loop1, sector 64 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3485 isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 __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 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' print_req_error: I/O error, dev loop1, sector 64 isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 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: 0033:0x7f486f992347 RSP: 002b:00007ffdcc237848 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000017c5030 RCX: 00007f486f992347 RDX: 0000000000000000 RSI: 0000000000005331 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007f486fc425a0 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005 INFO: task syz-executor657:6949 blocked for more than 140 seconds. kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env Not tainted 4.14.138 #34 kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor657 D28528 6949 6860 0x80000004 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 print_req_error: I/O error, dev loop9, sector 64 isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env schedule+0x92/0x1c0 kernel/sched/core.c:3427 kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3485 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x96b/0x1860 block/ioctl.c:594 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' print_req_error: I/O error, dev loop1, sector 64 isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 ioctl_by_bdev+0xa5/0x110 fs/block_dev.c:2066 isofs_get_last_session fs/isofs/inode.c:571 [inline] isofs_fill_super+0x1cbf/0x25af fs/isofs/inode.c:670 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' mount_bdev+0x2be/0x370 fs/super.c:1134 isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 isofs_mount+0x35/0x40 fs/isofs/inode.c:1570 mount_fs+0x97/0x2a1 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x441a59 RSP: 002b:00007ffd2208bdd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441a59 RDX: 00000000200000c0 RSI: 0000000020000180 RDI: 0000000020001e00 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' R13: 00000000004026f0 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor657:6974 blocked for more than 140 seconds. Not tainted 4.14.138 #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' syz-executor657 D28528 6974 6861 0x80000004 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 schedule+0x92/0x1c0 kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3485 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x96b/0x1860 block/ioctl.c:594 ioctl_by_bdev+0xa5/0x110 fs/block_dev.c:2066 isofs_get_last_session fs/isofs/inode.c:571 [inline] isofs_fill_super+0x1cbf/0x25af fs/isofs/inode.c:670 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' mount_bdev+0x2be/0x370 fs/super.c:1134 isofs_mount+0x35/0x40 fs/isofs/inode.c:1570 mount_fs+0x97/0x2a1 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env entry_SYSCALL_64_after_hwframe+0x42/0xb7 kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 RIP: 0033:0x441a59 RSP: 002b:00007ffd2208bdd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441a59 RDX: 00000000200000c0 RSI: 0000000020000180 RDI: 0000000020001e00 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' R13: 00000000004026f0 R14: 0000000000000000 R15: 0000000000000000 INFO: task blkid:6977 blocked for more than 140 seconds. kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' Not tainted 4.14.138 #34 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D29040 6977 6839 0x00000004 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3485 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 __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 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7fa004a6b347 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env RSP: 002b:00007ffe2103cb98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' RAX: ffffffffffffffda RBX: 00000000014ff030 RCX: 00007fa004a6b347 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' RDX: 0000000000000000 RSI: 0000000000005331 RDI: 0000000000000003 isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 RBP: 0000000000000003 R08: 00007fa004d1b5a0 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005 INFO: task syz-executor657:6982 blocked for more than 140 seconds. kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env Not tainted 4.14.138 #34 kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor657 D28528 6982 6864 0x00000004 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 schedule+0x92/0x1c0 kernel/sched/core.c:3427 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1f6/0x390 kernel/locking/rwsem-xadd.c:309 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x49/0xb0 kernel/locking/rwsem.c:26 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' __get_super.part.0+0x1cb/0x280 fs/super.c:678 __get_super include/linux/spinlock.h:317 [inline] get_super+0x2e/0x50 fs/super.c:707 fsync_bdev+0x19/0xd0 fs/block_dev.c:495 kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env invalidate_partition+0x36/0x60 block/genhd.c:1506 drop_partitions block/partition-generic.c:442 [inline] rescan_partitions+0xe3/0x860 block/partition-generic.c:515 kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' __blkdev_reread_part+0x15c/0x1e0 block/ioctl.c:173 blkdev_reread_part+0x27/0x40 block/ioctl.c:193 loop_reread_partitions+0x7c/0x90 drivers/block/loop.c:614 loop_set_status+0xc25/0x11f0 drivers/block/loop.c:1183 loop_set_status64+0xa6/0xf0 drivers/block/loop.c:1301 lo_ioctl+0x5c1/0x1ce0 drivers/block/loop.c:1431 __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 kobject: 'loop0' (ffff8880a49176a0): kobject_uevent_env RIP: 0033:0x441947 kobject: 'loop0' (ffff8880a49176a0): fill_kobj_path: path = '/devices/virtual/block/loop0' RSP: 002b:00007ffd2208bb98 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 isofs_fill_super: bread failed, dev=loop1, iso_blknum=16, block=32 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441947 RDX: 00007ffd2208bc30 RSI: 0000000000004c04 RDI: 0000000000000004 RBP: 0000000000000003 R08: 0000000000000000 R09: 000000000000000a kobject: 'loop4' (ffff8880a4a0c960): kobject_uevent_env R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000005 R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1012: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541 2 locks held by getty/6832: kobject: 'loop4' (ffff8880a4a0c960): fill_kobj_path: path = '/devices/virtual/block/loop4' #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6833: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6834: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6835: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6836: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6837: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6838: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 3 locks held by syz-executor657/6947: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1f/0x40 block/ioctl.c:192 #2: (&type->s_umount_key#52){.+.+}, at: [] __get_super.part.0+0x1cb/0x280 fs/super.c:678 1 lock held by blkid/6948: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 2 locks held by syz-executor657/6949: #0: (&type->s_umount_key#51/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#51/1){+.+.}, at: [] sget_userns+0x551/0xc30 fs/super.c:516 #1: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 2 locks held by syz-executor657/6974: #0: (&type->s_umount_key#51/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#51/1){+.+.}, at: [] sget_userns+0x551/0xc30 fs/super.c:516 #1: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 1 lock held by blkid/6977: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 3 locks held by syz-executor657/6982: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x8f/0x1ce0 drivers/block/loop.c:1404 #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1f/0x40 block/ioctl.c:192 #2: (&type->s_umount_key#52){.+.+}, at: [] __get_super.part.0+0x1cb/0x280 fs/super.c:678 2 locks held by syz-executor657/22788: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_put+0xa6/0x7f0 fs/block_dev.c:1778 #1: (loop_index_mutex){+.+.}, at: [] lo_release+0x20/0x1b0 drivers/block/loop.c:1666 2 locks held by syz-executor657/22791: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x1d/0xb0 drivers/block/loop.c:1623 2 locks held by blkid/22795: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x1d/0xb0 drivers/block/loop.c:1623 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1012 Comm: khungtaskd Not tainted 4.14.138 #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x141/0x189 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5e7/0xb90 kernel/hung_task.c:274 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: isofs_fill_super: bread failed, dev=loop9, iso_blknum=16, block=32 NMI backtrace for cpu 0 CPU: 0 PID: 22791 Comm: syz-executor657 Not tainted 4.14.138 #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888098a0c140 task.stack: ffff888093d78000 RIP: 0010:__lock_acquire+0x30a/0x4620 kernel/locking/lockdep.c:3421 RSP: 0018:ffff8880aee07b10 EFLAGS: 00000006 RAX: ffff888098a0c9e8 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 000000000000004f RSI: 1ffff11013141941 RDI: ffff888098a0ca08 RBP: ffff8880aee07cc0 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000050 R11: ffff888098a0c140 R12: ffffffff8932a500 R13: 0000000000000001 R14: 0000000000000002 R15: 0000000000000000 FS: 0000000001a7a880(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f382c00e2f0 CR3: 00000000933a3000 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 debug_object_deactivate lib/debugobjects.c:502 [inline] debug_object_deactivate+0xe7/0x350 lib/debugobjects.c:491 debug_hrtimer_deactivate kernel/time/hrtimer.c:406 [inline] debug_deactivate kernel/time/hrtimer.c:453 [inline] __run_hrtimer kernel/time/hrtimer.c:1190 [inline] __hrtimer_run_queues+0x163/0xbc0 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:ffff888093d7f970 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10 RAX: ffff888098a0c140 RBX: 1ffffffff0ee2a59 RCX: 1ffff1101314193c RDX: 0000000000000000 RSI: ffff888098a0c9c0 RDI: 0000000000000297 RBP: ffff888093d7f9b0 R08: ffff888098a0c140 R09: ffff888098a0c9e0 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000042 R13: 0000000000000297 R14: ffff8880a806e5c0 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 isofs_fill_super.cold+0x48/0x40d fs/isofs/inode.c:1006 mount_bdev+0x2be/0x370 fs/super.c:1134 isofs_mount+0x35/0x40 fs/isofs/inode.c:1570 mount_fs+0x97/0x2a1 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x441a59 RSP: 002b:00007ffd2208bdd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441a59 RDX: 00000000200000c0 RSI: 0000000020000180 RDI: 0000000020001e00 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000008b1 R13: 00000000004026f0 R14: 0000000000000000 R15: 0000000000000000 Code: 0f b6 14 16 84 d2 74 09 80 fa 03 0f 8e 65 0d 00 00 0f b7 50 20 81 e2 ff 1f 00 00 44 39 ea 75 0b 48 83 7d 10 00 0f 85 90 06 00 00 <4c> 03 94 24 90 00 00 00 45 89 ef 66 41 81 e7 ff 1f 49 8d 42 20