UDF-fs: error (device loop2): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop2): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop2): udf_fill_super: No partition found (1) INFO: task syz-executor.2:6131 blocked for more than 140 seconds. Not tainted 4.14.173-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27872 6131 7332 0x80000004 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 lo_ioctl+0x87/0x1c40 drivers/block/loop.c:1414 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x91d/0x17d0 block/ioctl.c:594 ioctl_by_bdev+0xa0/0x110 fs/block_dev.c:2066 udf_get_last_block+0x8a/0x180 fs/udf/lowlevel.c:59 udf_load_vrs+0x484/0xa80 fs/udf/super.c:1965 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: 0033:0x45c679 RSP: 002b:00007fcc72ef9c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fcc72efa6d4 RCX: 000000000045c679 RDX: 0000000020000200 RSI: 0000000020000000 RDI: 0000000020000500 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000074a R14: 00000000004c9f51 R15: 000000000076bf0c INFO: task syz-executor.4:6146 blocked for more than 140 seconds. Not tainted 4.14.173-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29136 6146 7329 0x00000004 Call Trace: 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 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+0x45/0xa0 kernel/locking/rwsem.c:26 __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 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 __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 lo_ioctl+0x590/0x1c40 drivers/block/loop.c:1441 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x91d/0x17d0 block/ioctl.c:594 block_ioctl+0xd9/0x120 fs/block_dev.c:1881 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c4e7 RSP: 002b:00007fddfb2079d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045c4e7 RDX: 00007fddfb207ac0 RSI: 0000000000004c04 RDI: 0000000000000004 RBP: 000000000076bf00 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000202 R12: 00000000ffffffff R13: 0000000000000c1c R14: 00000000004c1725 R15: 000000000076bf0c INFO: task blkid:6145 blocked for more than 140 seconds. Not tainted 4.14.173-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D29200 6145 7290 0x00000004 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893 lo_ioctl+0x87/0x1c40 drivers/block/loop.c:1414 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x91d/0x17d0 block/ioctl.c:594 block_ioctl+0xd9/0x120 fs/block_dev.c:1881 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7faa3a5cf347 RSP: 002b:00007ffd2f1a0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000009fd030 RCX: 00007faa3a5cf347 RDX: 0000000000000000 RSI: 0000000000005331 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007faa3a87f5a0 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000200 R14: 0000000000000003 R15: 0000000000000005 Showing all locks held in the system: 1 lock held by khungtaskd/1056: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4544 2 locks held by getty/7282: #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/7283: #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/7284: #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/7285: #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/7286: #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/7287: #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/7288: #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 syz-executor.2/6131: #0: (&type->s_umount_key#70/1){+.+.}, at: [] alloc_super fs/super.c:251 [inline] #0: (&type->s_umount_key#70/1){+.+.}, at: [] sget_userns+0x556/0xc30 fs/super.c:516 #1: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1c40 drivers/block/loop.c:1414 3 locks held by syz-executor.4/6146: #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#71){++++}, at: [] __get_super.part.0+0x1c6/0x280 fs/super.c:678 1 lock held by blkid/6145: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1c40 drivers/block/loop.c:1414 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1056 Comm: khungtaskd Not tainted 4.14.173-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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2321 Comm: syz-executor.0 Not tainted 4.14.173-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808de5a3c0 task.stack: ffff888214380000 RIP: 0010:do_signal+0x2/0x1690 arch/x86/kernel/signal.c:811 RSP: 0000:ffff888214387ee8 EFLAGS: 00000297 RAX: ffff88808de5a3c0 RBX: 0000000000000004 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888214387f58 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffed1011bcb478 R13: ffff888214387f58 R14: ffff88808de5a3c0 R15: ffffffff87d16698 FS: 00007f9f207c3700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000003382dfb0 CR3: 000000008ade2000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: exit_to_usermode_loop+0x159/0x220 arch/x86/entry/common.c:160 prepare_exit_to_usermode+0x1af/0x210 arch/x86/entry/common.c:199 retint_user+0x8/0x18 RIP: 0033:0x405ac9 RSP: 002b:00007f9f207c2a70 EFLAGS: 00010206 RAX: 000000003382dfa0 RBX: 00007f9f207c36d4 RCX: 0000000000416477 RDX: 120fb768afb3041d RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000076bf00 R08: 00007f9f207c2a70 R09: 000000000076bf00 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff R13: 0000000000000bd9 R14: 00000000004cdd9d R15: 000000000076bf0c Code: 54 24 08 48 89 34 24 e8 bd 48 64 00 48 8b 4c 24 10 48 8b 54 24 08 48 8b 34 24 e9 6b f9 ff ff 66 2e 0f 1f 84 00 00 00 00 00 41 57 <49> 89 ff 41 56 41 55 41 54 49 bc 00 00 00 00 00 fc ff df 55 53