UDF-fs: error (device loop4): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop4): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop4): udf_fill_super: No partition found (1) INFO: task syz-executor5:29798 blocked for more than 140 seconds. Not tainted 4.20.0+ #392 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D23136 29798 25027 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline] rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x9b/0x120 kernel/locking/rwsem.c:26 __get_super.part.11+0x207/0x2e0 fs/super.c:698 __get_super include/linux/spinlock.h:329 [inline] get_super+0x2d/0x50 fs/super.c:727 fsync_bdev+0x17/0xc0 fs/block_dev.c:469 invalidate_partition+0x35/0x60 block/genhd.c:1570 drop_partitions.isra.14+0xe1/0x200 block/partition-generic.c:445 rescan_partitions+0x72/0x8e0 block/partition-generic.c:518 __blkdev_reread_part+0x1ad/0x230 block/ioctl.c:173 blkdev_reread_part+0x26/0x40 block/ioctl.c:193 loop_reread_partitions+0x163/0x190 drivers/block/loop.c:644 loop_set_status+0xb95/0x1010 drivers/block/loop.c:1198 loop_set_status64+0xaa/0x100 drivers/block/loop.c:1316 lo_ioctl+0x90e/0x1d60 drivers/block/loop.c:1432 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0xd8a/0x21b0 block/ioctl.c:605 block_ioctl+0xee/0x130 fs/block_dev.c:1883 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4579b9 Code: Bad RIP value. RSP: 002b:00007fc2b5f55c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004579b9 RDX: 0000000020000380 RSI: 0000000000004c04 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2b5f566d4 R13: 00000000004c0ed1 R14: 00000000004d27d8 R15: 00000000ffffffff INFO: task syz-executor5:29826 blocked for more than 140 seconds. Not tainted 4.20.0+ #392 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D24168 29826 25027 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 __blkdev_get+0x19b/0x13c0 fs/block_dev.c:1466 blkdev_get+0xc1/0xb50 fs/block_dev.c:1617 blkdev_open+0x1fb/0x280 fs/block_dev.c:1775 do_dentry_open+0x499/0x1250 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bc/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4115f1 Code: 2e 0f 1f 84 00 00 00 00 00 41 57 49 89 ff 41 56 41 55 49 89 d5 41 54 55 53 48 81 ec 28 04 00 00 8b 4f 64 64 48 8b 04 25 28 00 <00> 00 48 89 84 24 18 04 00 00 31 c0 48 89 34 24 85 c9 74 18 8b 47 RSP: 002b:00007fc2b5f347a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004115f1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fc2b5f34850 RBP: 000000000073bfa0 R08: 000000000000000f R09: 0000000000000000 R10: 00007fc2b5f359d0 R11: 0000000000000293 R12: 00007fc2b5f356d4 R13: 00000000004c61c1 R14: 00000000004dafe0 R15: 00000000ffffffff INFO: task blkid:29801 blocked for more than 140 seconds. Not tainted 4.20.0+ #392 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D22208 29801 25071 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 __blkdev_get+0x19b/0x13c0 fs/block_dev.c:1466 blkdev_get+0xc1/0xb50 fs/block_dev.c:1617 blkdev_open+0x1fb/0x280 fs/block_dev.c:1775 do_dentry_open+0x499/0x1250 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x12bc/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f382fa10120 Code: Bad RIP value. RSP: 002b:00007ffc7c21e3d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f382fa10120 RDX: 00007ffc7c21ff40 RSI: 0000000000000000 RDI: 00007ffc7c21ff40 RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000015c0030 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 Showing all locks held in the system: 1 lock held by khungtaskd/1027: #0: 000000008ec2e668 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4389 1 lock held by rsyslogd/7841: #0: 000000006eb3858b (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/7932: #0: 00000000f3d05403 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000226facb8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7933: #0: 000000001f06af3a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000ecd78e56 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7934: #0: 000000007ce6a8a3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000ff1357da (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7935: #0: 00000000576d0b49 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000e8207fa2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7936: #0: 00000000e8f96971 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000e39d3706 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7937: #0: 00000000fd12278c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000064738516 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/7938: #0: 000000004d6193f8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000006d4de636 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by syz-executor0/29792: 3 locks held by syz-executor5/29798: #0: 00000000d1118f54 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8e/0x1d60 drivers/block/loop.c:1402 #1: 00000000214b29ee (&bdev->bd_mutex){+.+.}, at: blkdev_reread_part+0x1e/0x40 block/ioctl.c:192 #2: 000000001aa4f193 (&type->s_umount_key#75){.+.+}, at: __get_super.part.11+0x207/0x2e0 fs/super.c:698 1 lock held by syz-executor5/29826: #0: 00000000214b29ee (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13c0 fs/block_dev.c:1466 1 lock held by blkid/29801: #0: 00000000214b29ee (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13c0 fs/block_dev.c:1466 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1027 Comm: khungtaskd Not tainted 4.20.0+ #392 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1c2/0x22c 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xb51/0x1060 kernel/hung_task.c:289 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.509 msecs NMI backtrace for cpu 1 CPU: 1 PID: 29792 Comm: syz-executor0 Not tainted 4.20.0+ #392 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x50 kernel/kcov.c:106 Code: 65 8b 15 c8 47 80 7e 81 e2 00 01 1f 00 75 2b 8b 90 d8 12 00 00 83 fa 02 75 20 48 8b 88 e0 12 00 00 8b 80 dc 12 00 00 48 8b 11 <48> 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 55 RSP: 0000:ffff88805238eb30 EFLAGS: 00000246 RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc90006002000 RDX: 000000000003ffff RSI: ffffffff839297d8 RDI: 0000000000000005 RBP: ffff88805238eb30 R08: ffff888097a32580 R09: ffffed1015ce5b8f R10: ffffed1015ce5b8f R11: ffff8880ae72dc7b R12: 0000000000000001 R13: ffffffff8880a780 R14: ffffffff8880a740 R15: ffff88805238ed08 FS: 00007ff0f473b700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000053862000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x48/0x280 lib/smp_processor_id.c:51 debug_smp_processor_id+0x1c/0x20 lib/smp_processor_id.c:56 rcu_dynticks_curr_cpu_in_eqs+0x69/0x170 kernel/rcu/tree.c:303 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:932 rcu_read_lock_held+0x87/0xc0 kernel/rcu/update.c:277 xa_entry include/linux/xarray.h:902 [inline] xas_descend+0x413/0x510 lib/xarray.c:198 xas_load+0x145/0x1e0 lib/xarray.c:234 find_get_entry+0x3ca/0x1120 mm/filemap.c:1415 pagecache_get_page+0x12f/0xf00 mm/filemap.c:1518 find_or_create_page include/linux/pagemap.h:322 [inline] grow_dev_page fs/buffer.c:947 [inline] grow_buffers fs/buffer.c:1016 [inline] __getblk_slow fs/buffer.c:1043 [inline] __getblk_gfp+0x3aa/0xd50 fs/buffer.c:1320 __bread_gfp+0x2d/0x300 fs/buffer.c:1354 sb_bread include/linux/buffer_head.h:307 [inline] udf_tread+0xf2/0x140 fs/udf/misc.c:44 udf_check_vsd fs/udf/super.c:686 [inline] udf_load_vrs+0x409/0xdb0 fs/udf/super.c:1919 udf_fill_super+0xc55/0x235c fs/udf/super.c:2132 mount_bdev+0x30c/0x3e0 fs/super.c:1158 udf_mount+0x34/0x40 fs/udf/super.c:131 mount_fs+0xae/0x31d fs/super.c:1261 vfs_kern_mount.part.35+0xdc/0x4f0 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x581/0x31f0 fs/namespace.c:2801 ksys_mount+0x12d/0x140 fs/namespace.c:3017 __do_sys_mount fs/namespace.c:3031 [inline] __se_sys_mount fs/namespace.c:3028 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3028 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4579b9 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff0f473ac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004579b9 RDX: 0000000020000480 RSI: 0000000020000440 RDI: 0000000020000400 RBP: 000000000073bfa0 R08: 00000000200004c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff0f473b6d4 R13: 00000000004c3695 R14: 00000000004d61e0 R15: 00000000ffffffff