Attempt to read inode for relocated directory isofs: Unknown ZF compression algorithm: INFO: task syz-executor.1:26928 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29392 26928 26631 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 ISOFS: Unable to identify CD-ROM format. call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 grab_super+0xa2/0x350 fs/super.c:383 ISO 9660 Extensions: Microsoft Joliet Level 0 Symlink component flag not implemented sget_userns+0x352/0xcd0 fs/super.c:511 ISO 9660 Extensions: Microsoft Joliet Level 0 Attempt to read inode for relocated directory sget+0x102/0x140 fs/super.c:570 mount_bdev+0xf8/0x3b0 fs/super.c:1131 mount_fs+0xa3/0x310 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:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe ISOFS: Unable to identify CD-ROM format. RIP: 0033:0x7fbbf3f2d279 Code: Bad RIP value. RSP: 002b:00007fbbf28a2168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbbf403ff80 RCX: 00007fbbf3f2d279 RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 RBP: 00007fbbf3f87189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd414e1cf R14: 00007fbbf28a2300 R15: 0000000000022000 INFO: task syz-executor.1:26930 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29480 26930 26631 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/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:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 __get_super.part.0+0x209/0x2e0 fs/super.c:698 __get_super include/linux/spinlock.h:329 [inline] get_super+0x2b/0x50 fs/super.c:727 fsync_bdev+0x14/0xc0 fs/block_dev.c:483 ISOFS: Unable to identify CD-ROM format. blkdev_flushbuf block/ioctl.c:436 [inline] blkdev_ioctl+0x912/0x1a80 block/ioctl.c:521 block_ioctl+0xe9/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 ISO 9660 Extensions: Microsoft Joliet Level 0 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 isofs: Unknown ZF compression algorithm: entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fbbf3f2d279 Code: Bad RIP value. RSP: 002b:00007fbbf2881168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fbbf4040050 RCX: 00007fbbf3f2d279 RDX: 0000000000000000 RSI: 0000000000001261 RDI: 0000000000000003 RBP: 00007fbbf3f87189 R08: 0000000000000000 R09: 0000000000000000 ISO 9660 Extensions: Microsoft Joliet Level 0 ISOFS: unable to read i-node block R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd414e1cf R14: 00007fbbf2881300 R15: 0000000000022000 ISOFS: Unable to identify CD-ROM format. Showing all locks held in the system: 1 lock held by khungtaskd/1571: #0: 000000004d0b4d1c (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7768: #0: 00000000b96ba49e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 3 locks held by kworker/u4:1/1824: 2 locks held by syz-executor.1/26507: 2 locks held by syz-executor.1/26928: #0: 00000000599bf2f0 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 ISO 9660 Extensions: Microsoft Joliet Level 0 Symlink component flag not implemented ISO 9660 Extensions: Microsoft Joliet Level 0 ISO 9660 Extensions: Microsoft Joliet Level 0 #1: 000000007916d957 (&type->s_umount_key#100){++++}, at: grab_super+0xa2/0x350 fs/super.c:383 Attempt to read inode for relocated directory isofs: Unknown ZF compression algorithm: 1 lock held by syz-executor.1/26930: #0: 000000007916d957 (&type->s_umount_key#100){++++}, at: __get_super.part.0+0x209/0x2e0 fs/super.c:698 ISO 9660 Extensions: Microsoft Joliet Level 0 ISOFS: unable to read i-node block 1 lock held by syz-executor.1/27239: ISOFS: Unable to identify CD-ROM format. #0: 00000000599bf2f0 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 1 lock held by syz-executor.1/27240: #0: 000000007916d957 (&type->s_umount_key#100){++++}, at: __get_super.part.0+0x209/0x2e0 fs/super.c:698 1 lock held by syz-executor.1/27303: #0: 000000000209c02f (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478 2 locks held by systemd-udevd/27572: #0: 000000000209c02f (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xfc/0x870 fs/block_dev.c:1806 #1: 000000004d0b4d1c (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000004d0b4d1c (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 3 locks held by syz-executor.1/31244: 2 locks held by syz-executor.3/31245: #0: 000000004da62d7f (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1826 [inline] #0: 000000004da62d7f (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455 #1: 000000004d0b4d1c (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000004d0b4d1c (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 1 lock held by syz-executor.3/31247: #0: 00000000879ae5ac (loop_ctl_mutex){+.+.}, at: loop_set_fd drivers/block/loop.c:956 [inline] #0: 00000000879ae5ac (loop_ctl_mutex){+.+.}, at: lo_ioctl+0x1bb/0x20e0 drivers/block/loop.c:1576 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4689 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:___bpf_prog_run+0x1ca8/0x4e80 kernel/bpf/core.c:1101 Code: 84 c9 0f 85 69 26 00 00 41 8b 4e 04 49 83 c6 08 d3 e0 49 89 07 e9 a8 e3 ff ff e8 33 32 f6 ff 49 8d 7e 04 48 89 f8 48 c1 e8 03 <0f> b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 13 RSP: 0018:ffff8880a0d2fa30 EFLAGS: 00000a03 RAX: 1ffff9200035a80b RBX: dffffc0000000000 RCX: ffff8880a0d2fe70 RDX: 0000000000000000 RSI: ffffffff816c533d RDI: ffffc90001ad405c RBP: ffff8880a0d2fb00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffffffff886fb460 R13: ffffed10141a5f62 R14: ffffc90001ad4058 R15: 00000000000000b4 FS: 00007ffb766488c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffb704e6010 CR3: 00000000a0d72000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: