UDF-fs: Scanning with blocksize 4096 failed 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 INFO: task syz-executor256:9222 blocked for more than 140 seconds. Not tainted 4.19.166-syzkaller #0 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 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 syz-executor256 D29680 9222 8132 0x00000004 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 UDF-fs: Scanning with blocksize 512 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 loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 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 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 UDF-fs: Scanning with blocksize 1024 failed 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 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: Scanning with blocksize 1024 failed UDF-fs: Scanning with blocksize 2048 failed call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 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 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 grab_super+0xa2/0x350 fs/super.c:383 UDF-fs: error (device loop11): 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 UDF-fs: Scanning with blocksize 2048 failed sget_userns+0x352/0xcd0 fs/super.c:511 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 UDF-fs: warning (device loop11): udf_fill_super: No partition found (1) UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 sget+0x102/0x140 fs/super.c:570 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found mount_bdev+0xf8/0x3b0 fs/super.c:1131 UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) mount_fs+0xa3/0x30c fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 UDF-fs: error (device loop7): 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+0x113c/0x2f10 fs/namespace.c:2799 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 RIP: 0033:0x44ace9 Code: dd c9 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 ab c9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 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 loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found RSP: 002b:00007fca2f83bdb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 UDF-fs: Scanning with blocksize 512 failed RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044ace9 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 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: 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 loop7): udf_load_vrs: No anchor found RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed 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 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c UDF-fs: Scanning with blocksize 1024 failed 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 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 R13: 00007ffd3da9a17f R14: 00007fca2f83c9c0 R15: 0000000000000001 UDF-fs: Scanning with blocksize 512 failed 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=512, location=512 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found Showing all locks held in the system: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 4096 failed 1 lock held by khungtaskd/1566: UDF-fs: warning (device loop11): udf_load_vrs: No anchor found #0: 00000000f0ff1321 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 UDF-fs: warning (device loop7): udf_fill_super: No partition found (1) UDF-fs: Scanning with blocksize 2048 failed UDF-fs: warning (device loop9): udf_load_vrs: No anchor found 1 lock held by in:imklog/7785: UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 #0: 00000000baff832d (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 1 lock held by syz-executor256/8526: 2 locks held by kworker/u4:1/8650: 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 #0: 0000000073af0d10 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1824 [inline] #0: 0000000073af0d10 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 #1: 00000000f0ff1321 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 00000000f0ff1321 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_load_vrs: No anchor found 5 locks held by syz-executor256/8802: UDF-fs: Scanning with blocksize 512 failed 1 lock held by syz-executor256/9201: 2 locks held by syz-executor256/9222: #0: 00000000dfec1353 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 #1: 0000000040ed3b20 (&type->s_umount_key#47){+.+.}, at: grab_super+0xa2/0x350 fs/super.c:383 UDF-fs: Scanning with blocksize 2048 failed UDF-fs: Scanning with blocksize 4096 failed 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_fill_super: No partition found (1) 1 lock held by syz-executor256/25209: UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256 2 locks held by syz-executor256/25228: #0: 00000000da515281 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 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 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found #1: 0000000073af0d10 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1824 [inline] #1: 0000000073af0d10 (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: Scanning with blocksize 1024 failed 1 lock held by syz-executor256/25233: UDF-fs: warning (device loop9): udf_load_vrs: No anchor found 2 locks held by syz-executor256/25237: 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 UDF-fs: Scanning with blocksize 4096 failed #0: 000000009983571d (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512 #1: 0000000055f96326 (&type->s_umount_key#47){+.+.}, at: grab_super+0xa2/0x350 fs/super.c:383 UDF-fs: Scanning with blocksize 512 failed UDF-fs: warning (device loop9): udf_fill_super: No partition found (1) UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256 1 lock held by syz-executor256/25241: 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 2 locks held by syz-executor256/25244: 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 #0: 00000000bcc36145 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 UDF-fs: Scanning with blocksize 2048 failed #1: 00000000e1bb504f (&type->s_umount_key#47){+.+.}, at: grab_super+0xa2/0x350 fs/super.c:383 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 UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop9): udf_load_vrs: No anchor found ============================================= UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop9): 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: error (device loop11): udf_read_tagged: read failed, block=256, location=256 NMI backtrace for cpu 0 CPU: 0 PID: 1566 Comm: khungtaskd Not tainted 4.19.166-syzkaller #0 UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8526 Comm: syz-executor256 Not tainted 4.19.166-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:find_get_entry+0x4f4/0x8a0 mm/filemap.c:1447 Code: 01 00 00 e8 be 30 e6 ff e8 29 c1 d4 ff e8 b4 30 e6 ff 48 c7 c2 4d a0 7e 81 be 01 00 00 00 48 c7 c7 60 5c f8 89 e8 0c f5 cd ff <48> 8b 4c 24 30 48 b8 00 00 00 00 00 fc ff df 48 c7 04 01 00 00 00 RSP: 0018:ffff8880a948f5d8 EFLAGS: 00000296 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 1ffff11014be492e RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000286 RBP: ffffea00022dd0c0 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffea00022dd0c0 R14: ffff8880b1aa4aa8 R15: dffffc0000000000 FS: 00007fca2f83c700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f189e553000 CR3: 000000009a333000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pagecache_get_page+0x56/0xd50 mm/filemap.c:1564 find_or_create_page include/linux/pagemap.h:322 [inline] grow_dev_page fs/buffer.c:948 [inline] grow_buffers fs/buffer.c:1017 [inline] __getblk_slow+0x216/0x9e0 fs/buffer.c:1044 __getblk_gfp fs/buffer.c:1321 [inline] __bread_gfp+0x218/0x300 fs/buffer.c:1366 sb_bread include/linux/buffer_head.h:309 [inline] udf_tread+0xe8/0x130 fs/udf/misc.c:44 udf_read_tagged+0x4e/0x530 fs/udf/misc.c:210 udf_check_anchor_block+0x1b4/0x610 fs/udf/super.c:1820 udf_scan_anchors+0x3ba/0x5f0 fs/udf/super.c:1882 udf_find_anchor fs/udf/super.c:1917 [inline] udf_load_vrs+0x633/0xbf0 fs/udf/super.c:1982 udf_fill_super+0x7d2/0x181f fs/udf/super.c:2177 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 mount_fs+0xa3/0x30c fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x44ace9 Code: dd c9 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 ab c9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fca2f83bdb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 000000000044ace9 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c R13: 00007ffd3da9a17f R14: 00007fca2f83c9c0 R15: 0000000000000001 UDF-fs: warning (device loop7): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: warning (device loop11): udf_load_vrs: No anchor found 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 loop9): 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: Scanning with blocksize 4096 failed UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop9): udf_load_vrs: No anchor found UDF-fs: warning (device loop11): udf_load_vrs: No anchor found UDF-fs: warning (device loop7): udf_fill_super: No partition found (1)