UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed INFO: task syz-executor809:7974 blocked for more than 140 seconds. UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 Not tainted 4.19.37 #5 UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop11): 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 kobject: 'loop4' (00000000730b524a): kobject_uevent_env UDF-fs: error (device loop11): 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=256, location=256 kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' syz-executor809 D UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 29448 7974 7919 0x00000004 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 Call Trace: 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 loop11): udf_load_vrs: No anchor found kobject: 'loop4' (00000000730b524a): kobject_uevent_env context_switch kernel/sched/core.c:2826 [inline] __schedule+0x813/0x1d00 kernel/sched/core.c:3474 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop11): 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: Scanning with blocksize 2048 failed UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 schedule+0x92/0x1c0 kernel/sched/core.c:3518 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (00000000730b524a): kobject_uevent_env __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:573 [inline] rwsem_down_write_failed+0x774/0xcc0 kernel/locking/rwsem-xadd.c:602 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' 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 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x53/0x90 kernel/locking/rwsem.c:72 UDF-fs: Scanning with blocksize 1024 failed 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 grab_super+0xaf/0x2c0 fs/super.c:383 kobject: 'loop5' (0000000017b1de5b): kobject_uevent_env kobject: 'loop5' (0000000017b1de5b): fill_kobj_path: path = '/devices/virtual/block/loop5' UDF-fs: Scanning with blocksize 4096 failed 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) kobject: 'loop4' (00000000730b524a): kobject_uevent_env kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' sget_userns+0x35a/0xd30 fs/super.c:511 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found kobject: 'loop4' (00000000730b524a): kobject_uevent_env UDF-fs: Scanning with blocksize 2048 failed kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' print_req_error: 281 callbacks suppressed print_req_error: I/O error, dev loop9, sector 64 print_req_error: I/O error, dev loop11, sector 64 print_req_error: I/O error, dev loop11, sector 256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop3' (000000003600d18a): kobject_uevent_env print_req_error: I/O error, dev loop11, sector 512 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 print_req_error: I/O error, dev loop9, sector 2048 sget+0x10c/0x150 fs/super.c:570 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 mount_bdev+0xff/0x3c0 fs/super.c:1131 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found kobject: 'loop3' (000000003600d18a): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: Scanning with blocksize 512 failed print_req_error: I/O error, dev loop7, sector 64 udf_mount+0x35/0x40 fs/udf/super.c:131 kobject: 'loop4' (00000000730b524a): kobject_uevent_env kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' print_req_error: I/O error, dev loop7, sector 256 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop3' (000000003600d18a): kobject_uevent_env print_req_error: I/O error, dev loop9, sector 4096 kobject: 'loop3' (000000003600d18a): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 mount_fs+0xae/0x331 fs/super.c:1261 print_req_error: I/O error, dev loop11, sector 64 vfs_kern_mount.part.0+0x6f/0x410 fs/namespace.c:961 print_req_error: I/O error, dev loop11, sector 512 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x53e/0x2bc0 fs/namespace.c:2799 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found ksys_mount+0xdb/0x150 fs/namespace.c:3015 kobject: 'loop5' (0000000017b1de5b): kobject_uevent_env UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) kobject: 'loop5' (0000000017b1de5b): fill_kobj_path: path = '/devices/virtual/block/loop5' __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3026 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 1024 failed do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'loop3' (000000003600d18a): kobject_uevent_env 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 kobject: 'loop3' (000000003600d18a): fill_kobj_path: path = '/devices/virtual/block/loop3' RIP: 0033:0x44aeb9 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 Code: 5d ca 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 2b ca fb ff c3 66 2e 0f 1f 84 00 00 00 00 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 512 failed 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: error (device loop11): udf_read_tagged: read failed, block=512, location=512 RSP: 002b:00007f4ecc82bce8 EFLAGS: 00000246 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044aeb9 UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: error (device loop11): 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 RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000020000080 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 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 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop11): udf_load_vrs: No anchor found R13: 00007ffee39c32bf R14: 00007f4ecc82c9c0 R15: 0000000000000001 UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 4096 failed UDF-fs: error (device loop11): 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=256, location=256 Showing all locks held in the system: UDF-fs: error (device loop11): 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 loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found 1 lock held by khungtaskd/1032: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 2048 failed #0: 0000000071f1ec61 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4435 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 1 lock held by rsyslogd/7770: UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 2 locks held by getty/7892: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 #0: UDF-fs: Scanning with blocksize 4096 failed 00000000f9aa85c5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 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 #1: 00000000a914f5b4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 2 locks held by getty/7893: kobject: 'loop4' (00000000730b524a): kobject_uevent_env #0: 000000007a641801 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 #1: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): 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=512, location=512 000000001de80c35 kobject: 'loop4' (00000000730b524a): kobject_uevent_env kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' ( UDF-fs: warning (device loop11): udf_load_vrs: No anchor found &ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 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 4096 failed 2 locks held by getty/7894: UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 2048 failed #0: kobject: 'loop4' (00000000730b524a): kobject_uevent_env 00000000fa041c10 kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' ( UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 &tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 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 kobject: 'loop4' (00000000730b524a): kobject_uevent_env #1: 000000006afde75d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 2 locks held by getty/7895: UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed #0: 00000000f3892b5e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 kobject: 'loop5' (0000000017b1de5b): kobject_uevent_env UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) #1: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 00000000f6c803c0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 kobject: 'loop5' (0000000017b1de5b): fill_kobj_path: path = '/devices/virtual/block/loop5' 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 loop9): udf_read_tagged: read failed, block=512, location=512 2 locks held by getty/7896: kobject: 'loop4' (00000000730b524a): kobject_uevent_env kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: warning (device loop9): udf_load_vrs: No anchor found #0: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 2048 failed kobject: 'loop3' (000000003600d18a): kobject_uevent_env 00000000ad2de72c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop3' (000000003600d18a): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 #1: kobject: 'loop4' (00000000730b524a): kobject_uevent_env UDF-fs: warning (device loop7): udf_load_vrs: No anchor found kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' 0000000026ca1b74 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found 2 locks held by getty/7897: UDF-fs: Scanning with blocksize 512 failed #0: 00000000a63d820b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (00000000730b524a): kobject_uevent_env #1: 00000000128d7fcb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4' 2 locks held by getty/7898: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 #0: 00000000bdfc4938 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:363 UDF-fs: Scanning with blocksize 1024 failed kobject: 'loop5' (0000000017b1de5b): kobject_uevent_env #1: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 00000000d9c85de5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 drivers/tty/n_tty.c:2154 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found kobject: 'loop5' (0000000017b1de5b): fill_kobj_path: path = '/devices/virtual/block/loop5' UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 1 lock held by syz-executor809/7969: 1 lock held by syz-executor809/7971: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 1024 failed kobject: 'loop3' (000000003600d18a): kobject_uevent_env UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 2 locks held by syz-executor809/7945: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 kobject: 'loop3' (000000003600d18a): fill_kobj_path: path = '/devices/virtual/block/loop3' 2 locks held by syz-executor809/7974: 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 #0: 000000008fbcb0fb (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x93/0x3c0 fs/super.c:1125 UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed #1: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 00000000bf0799f9 (&type->s_umount_key#52){+.+.}, at: grab_super+0xaf/0x2c0 fs/super.c:383 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 4 locks held by syz-executor809/11416: UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 1 lock held by syz-executor809/11413: UDF-fs: warning (device loop9): udf_load_vrs: No anchor found 2 locks held by syz-executor809/11424: UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found #0: 000000003e08714a (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x93/0x3c0 fs/super.c:1125 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 4096 failed 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 loop11): udf_fill_super: No partition found (1) #1: 000000005744e45a (&type->s_umount_key#52){+.+.}, at: grab_super+0xaf/0x2c0 fs/super.c:383 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 1 lock held by syz-executor809/11418: UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 2048 failed 2 locks held by syz-executor809/11426: UDF-fs: Scanning with blocksize 4096 failed #0: 00000000016ab533 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x93/0x3c0 fs/super.c:1125 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: warning (device loop11): udf_load_vrs: No anchor found #1: 00000000fede4fbe (&type->s_umount_key#52){+.+.}, at: grab_super+0xaf/0x2c0 fs/super.c:383 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_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed ============================================= UDF-fs: Scanning with blocksize 4096 failed 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) NMI backtrace for cpu 0 CPU: 0 PID: 1032 Comm: khungtaskd Not tainted 4.19.37 #5 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 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:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7969 Comm: syz-executor809 Not tainted 4.19.37 #5 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x18/0x20 kernel/kcov.c:197 Code: 8b 4d 08 e8 ba fe ff ff 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 f2 48 89 fe bf 07 00 00 00 48 89 e5 48 8b 4d 08 e8 98 fe ff ff <5d> c3 66 0f 1f 44 00 00 55 48 89 fa 48 89 e5 41 55 41 54 49 89 f4 RSP: 0018:ffff888091f47678 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffffea00021fa948 RCX: ffffffff818477ed RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007 RBP: ffff888091f47678 R08: ffff888095bae540 R09: 0000000000000001 R10: ffffed1015d24732 R11: ffff8880ae923993 R12: ffffea00021fa940 R13: ffffea00021fa940 R14: 0000000000000000 R15: ffffea00021fa848 FS: 00007f4ecc82c700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f656d813000 CR3: 00000000946fc000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: compound_head include/linux/page-flags.h:144 [inline] PageLocked include/linux/page-flags.h:272 [inline] unlock_page+0x8d/0x290 mm/filemap.c:1205 grow_dev_page fs/buffer.c:982 [inline] grow_buffers fs/buffer.c:1017 [inline] __getblk_slow fs/buffer.c:1044 [inline] __getblk_gfp+0x638/0x970 fs/buffer.c:1321 __bread_gfp+0x2f/0x300 fs/buffer.c:1355 sb_bread include/linux/buffer_head.h:307 [inline] udf_tread+0xf1/0x140 fs/udf/misc.c:44 udf_read_tagged+0x50/0x530 fs/udf/misc.c:210 udf_check_anchor_block+0x1ef/0x680 fs/udf/super.c:1755 udf_scan_anchors+0x3f4/0x680 fs/udf/super.c:1817 udf_find_anchor fs/udf/super.c:1852 [inline] udf_load_vrs+0x67f/0xc80 fs/udf/super.c:1917 udf_fill_super+0x7cb/0x16f5 fs/udf/super.c:2112 mount_bdev+0x307/0x3c0 fs/super.c:1158 udf_mount+0x35/0x40 fs/udf/super.c:131 mount_fs+0xae/0x331 fs/super.c:1261 vfs_kern_mount.part.0+0x6f/0x410 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x53e/0x2bc0 fs/namespace.c:2799 ksys_mount+0xdb/0x150 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3026 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44aeb9 Code: 5d ca 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 2b ca fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4ecc82bce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044aeb9 RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000020000080 RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c R13: 00007ffee39c32bf R14: 00007f4ecc82c9c0 R15: 0000000000000001 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (00000000730b524a): kobject_uevent_env UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop4' (00000000730b524a): fill_kobj_path: path = '/devices/virtual/block/loop4'