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 loop11): 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 loop11): udf_load_vrs: No anchor found INFO: task syz-executor585:8628 blocked for more than 140 seconds. UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop9): udf_load_vrs: No anchor found kobject: 'loop4' (00000000927c3b92): kobject_uevent_env kobject: 'loop4' (00000000927c3b92): fill_kobj_path: path = '/devices/virtual/block/loop4' 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 Not tainted 5.0.0-rc1+ #23 UDF-fs: Scanning with blocksize 512 failed "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 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=256, location=256 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed syz-executor585 D26776 8628 8583 0x00000004 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 Call Trace: UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 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 UDF-fs: Scanning with blocksize 1024 failed 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=256, location=256 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found 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: 'loop4' (00000000927c3b92): kobject_uevent_env kobject: 'loop4' (00000000927c3b92): fill_kobj_path: path = '/devices/virtual/block/loop4' UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 2048 failed schedule+0xfe/0x350 kernel/sched/core.c:3516 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: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577 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: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed 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 loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found grab_super+0xbf/0x410 fs/super.c:384 UDF-fs: Scanning with blocksize 1024 failed 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 sget_userns+0x442/0xf50 fs/super.c:512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed 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: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) sget+0x10c/0x150 fs/super.c:571 mount_bdev+0xff/0x3c0 fs/super.c:1132 udf_mount+0x35/0x40 fs/udf/super.c:131 mount_fs+0x123/0x43a fs/super.c:1258 vfs_kern_mount.part.0+0xdb/0x570 fs/namespace.c:959 vfs_kern_mount fs/namespace.c:949 [inline] do_new_mount fs/namespace.c:2513 [inline] do_mount+0x58e/0x3330 fs/namespace.c:2847 ksys_mount+0xdb/0x150 fs/namespace.c:3063 __do_sys_mount fs/namespace.c:3077 [inline] __se_sys_mount fs/namespace.c:3074 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3074 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44ab59 Code: 7d cb 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 4b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f32193adce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dcc58 RCX: 000000000044ab59 RDX: 0000000020000100 RSI: 0000000020000080 RDI: 00000000200002c0 RBP: 00000000006dcc50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc5c R13: 00007ffc1909829f R14: 00007f32193ae9c0 R15: 00000000006dcd2c INFO: task syz-executor585:8637 blocked for more than 140 seconds. Not tainted 5.0.0-rc1+ #23 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor585 D26152 8637 8582 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3472 schedule+0xfe/0x350 kernel/sched/core.c:3516 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 grab_super+0xbf/0x410 fs/super.c:384 sget_userns+0x442/0xf50 fs/super.c:512 sget+0x10c/0x150 fs/super.c:571 mount_bdev+0xff/0x3c0 fs/super.c:1132 udf_mount+0x35/0x40 fs/udf/super.c:131 mount_fs+0x123/0x43a fs/super.c:1258 vfs_kern_mount.part.0+0xdb/0x570 fs/namespace.c:959 vfs_kern_mount fs/namespace.c:949 [inline] do_new_mount fs/namespace.c:2513 [inline] do_mount+0x58e/0x3330 fs/namespace.c:2847 ksys_mount+0xdb/0x150 fs/namespace.c:3063 __do_sys_mount fs/namespace.c:3077 [inline] __se_sys_mount fs/namespace.c:3074 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3074 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44ab59 Code: 7d cb 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 4b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f32193adce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dcc58 RCX: 000000000044ab59 RDX: 0000000020000100 RSI: 0000000020000080 RDI: 00000000200002c0 RBP: 00000000006dcc50 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc5c R13: 00007ffc1909829f R14: 00007f32193ae9c0 R15: 00000000006dcd2c Showing all locks held in the system: kobject: 'loop4' (00000000927c3b92): kobject_uevent_env 1 lock held by khungtaskd/1040: kobject: 'loop4' (00000000927c3b92): fill_kobj_path: path = '/devices/virtual/block/loop4' #0: 00000000892dd40d (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 1 lock held by rsyslogd/8409: kobject: 'loop5' (0000000094a9107a): kobject_uevent_env #0: 000000006967149b (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 kobject: 'loop5' (0000000094a9107a): fill_kobj_path: path = '/devices/virtual/block/loop5' print_req_error: 254 callbacks suppressed print_req_error: I/O error, dev loop7, sector 64 flags 0 kobject: 'loop3' (00000000d229ba1c): kobject_uevent_env print_req_error: I/O error, dev loop7, sector 256 flags 0 kobject: 'loop3' (00000000d229ba1c): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 print_req_error: I/O error, dev loop11, sector 64 flags 0 print_req_error: I/O error, dev loop11, sector 256 flags 0 print_req_error: I/O error, dev loop9, sector 64 flags 0 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 print_req_error: I/O error, dev loop9, sector 256 flags 0 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 print_req_error: I/O error, dev loop11, sector 512 flags 0 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 2 locks held by getty/8553: #0: 00000000ef31a665 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 print_req_error: I/O error, dev loop7, sector 512 flags 0 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 #1: 00000000c740da1a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 kobject: 'loop4' (00000000927c3b92): kobject_uevent_env print_req_error: I/O error, dev loop9, sector 512 flags 0 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 UDF-fs: Scanning with blocksize 512 failed print_req_error: I/O error, dev loop11, sector 64 flags 0 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found kobject: 'loop4' (00000000927c3b92): fill_kobj_path: path = '/devices/virtual/block/loop4' 2 locks held by getty/8554: UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed #0: 00000000a810b440 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 UDF-fs: error (device loop11): 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 loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 kobject: 'loop3' (00000000d229ba1c): kobject_uevent_env UDF-fs: warning (device loop11): udf_load_vrs: No anchor found kobject: 'loop3' (00000000d229ba1c): fill_kobj_path: path = '/devices/virtual/block/loop3' UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 #1: 000000000f6cdd25 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 2 locks held by getty/8555: UDF-fs: warning (device loop7): udf_load_vrs: No anchor found kobject: 'loop5' (0000000094a9107a): kobject_uevent_env #0: 00000000132f0342 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found kobject: 'loop5' (0000000094a9107a): fill_kobj_path: path = '/devices/virtual/block/loop5' UDF-fs: Scanning with blocksize 1024 failed #1: 000000009da7a315 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 1024 failed 2 locks held by getty/8556: 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 UDF-fs: Scanning with blocksize 2048 failed #0: 00000000606de560 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 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 loop7): udf_load_vrs: No anchor found #1: 000000005ad4f34d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 2 locks held by getty/8557: UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) #0: 00000000e1210dd7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 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 #1: 00000000b9e02b4f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 2 locks held by getty/8558: UDF-fs: Scanning with blocksize 512 failed UDF-fs: Scanning with blocksize 4096 failed #0: 0000000097fd6b23 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 UDF-fs: warning (device loop7): 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 loop9): udf_read_tagged: read failed, block=256, location=256 #1: 00000000972eaa31 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 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 loop11): 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_load_vrs: No anchor found 2 locks held by getty/8559: #0: 00000000f55cb8ca (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed #1: 00000000e45d2c1e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 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 loop9): udf_read_tagged: read failed, block=256, location=256 1 lock held by syz-executor585/8597: UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 2 locks held by syz-executor585/8598: 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: warning (device loop11): udf_load_vrs: No anchor found 2 locks held by syz-executor585/8628: UDF-fs: Scanning with blocksize 2048 failed #0: 000000005ee1b3f5 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x93/0x3c0 fs/super.c:1126 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: 0000000071d6f4a3 (&type->s_umount_key#52){+.+.}, at: grab_super+0xbf/0x410 fs/super.c:384 UDF-fs: Scanning with blocksize 4096 failed 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 2 locks held by syz-executor585/8599: UDF-fs: Scanning with blocksize 1024 failed 2 locks held by syz-executor585/8637: UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) #0: 00000000cdc03045 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x93/0x3c0 fs/super.c:1126 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: 000000005ae30c78 (&type->s_umount_key#52){+.+.}, at: grab_super+0xbf/0x410 fs/super.c:384 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 2 locks held by syz-executor585/11649: UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) #0: 00000000dfdf2a07 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x830 fs/block_dev.c:1806 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found #1: 000000008b160b9a (loop_ctl_mutex){+.+.}, at: lo_release+0x1f/0x200 drivers/block/loop.c:1741 1 lock held by syz-executor585/11660: UDF-fs: Scanning with blocksize 2048 failed #0: 00000000dfdf2a07 (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x560 fs/block_dev.c:1839 2 locks held by syz-executor585/11648: UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 #0: 000000003aec6712 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x830 fs/block_dev.c:1806 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 #1: 000000008b160b9a (loop_ctl_mutex){+.+.}, at: lo_release+0x1f/0x200 drivers/block/loop.c:1741 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 1 lock held by syz-executor585/11659: UDF-fs: Scanning with blocksize 4096 failed 2 locks held by syz-executor585/11653: UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) #0: 000000009fe92da9 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x830 fs/block_dev.c:1806 #1: 000000008b160b9a (loop_ctl_mutex){+.+.}, at: lo_release+0x1f/0x200 drivers/block/loop.c:1741 1 lock held by syz-executor585/11657: #0: 000000002f4415d7 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1400 fs/block_dev.c:1489 2 locks held by blkid/11652: #0: 000000002f4415d7 (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xbb/0x830 fs/block_dev.c:1806 #1: 000000008b160b9a (loop_ctl_mutex){+.+.}, at: __loop_clr_fd+0x88/0xc90 drivers/block/loop.c:1046 2 locks held by blkid/11661: #0: 0000000083290bfb (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1400 fs/block_dev.c:1489 #1: 000000008b160b9a (loop_ctl_mutex){+.+.}, at: lo_open+0x1d/0xd0 drivers/block/loop.c:1722 2 locks held by blkid/11662: #0: 0000000045504979 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1400 fs/block_dev.c:1489 #1: 000000008b160b9a (loop_ctl_mutex){+.+.}, at: lo_open+0x1d/0xd0 drivers/block/loop.c:1722 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc1+ #23 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+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 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+0xbbb/0x1170 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8597 Comm: syz-executor585 Not tainted 5.0.0-rc1+ #23 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__find_get_block_slow fs/buffer.c:206 [inline] RIP: 0010:__find_get_block fs/buffer.c:1294 [inline] RIP: 0010:__find_get_block+0x622/0xf20 fs/buffer.c:1288 Code: 00 00 4c 89 ee 48 89 df ba 01 00 00 00 2a 88 c2 00 00 00 48 d3 ee 31 c9 e8 7b ee bd ff 48 85 c0 49 89 c6 48 89 85 08 ff ff ff <0f> 84 7c fd ff ff e8 b3 0a 9f ff 48 8d 83 18 01 00 00 48 89 c7 48 RSP: 0018:ffff8880a82a7268 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88809d889558 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81a0ddb4 RDI: 0000000000000005 RBP: ffff8880a82a7390 R08: ffff888089fc0000 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8880ae62dc7b R12: 0000000000000010 R13: 0000000000000138 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f3219411700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000022f20d0 CR3: 000000008ba6a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __getblk_slow fs/buffer.c:1039 [inline] __getblk_gfp+0x295/0xd20 fs/buffer.c:1320 __bread_gfp+0x2f/0x300 fs/buffer.c:1354 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+0x1d5/0x640 fs/udf/super.c:1775 udf_scan_anchors+0x1cf/0x850 fs/udf/super.c:1815 udf_find_anchor fs/udf/super.c:1880 [inline] udf_load_vrs+0x968/0xdd0 fs/udf/super.c:1937 udf_fill_super+0xbac/0x2383 fs/udf/super.c:2132 mount_bdev+0x307/0x3c0 fs/super.c:1159 udf_mount+0x35/0x40 fs/udf/super.c:131 mount_fs+0x123/0x43a fs/super.c:1258 vfs_kern_mount.part.0+0xdb/0x570 fs/namespace.c:959 vfs_kern_mount fs/namespace.c:949 [inline] do_new_mount fs/namespace.c:2513 [inline] do_mount+0x58e/0x3330 fs/namespace.c:2847 ksys_mount+0xdb/0x150 fs/namespace.c:3063 __do_sys_mount fs/namespace.c:3077 [inline] __se_sys_mount fs/namespace.c:3074 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3074 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44ab59 Code: 7d cb 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 4b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3219410ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 000000000044ab59 RDX: 0000000020000100 RSI: 0000000020000080 RDI: 00000000200002c0 RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c R13: 00007ffc1909829f R14: 00007f32194119c0 R15: 00000000006dcd2c