INFO: task syz-executor.5:12983 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 hfs: unable to parse mount options "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D25784 12983 8130 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 io_schedule+0xb5/0x120 kernel/sched/core.c:5181 bit_wait_io+0x12/0x90 kernel/sched/wait_bit.c:207 __wait_on_bit_lock+0xb5/0x170 kernel/sched/wait_bit.c:89 out_of_line_wait_on_bit_lock+0xd2/0x100 kernel/sched/wait_bit.c:116 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer+0x52/0x60 fs/buffer.c:65 lock_buffer include/linux/buffer_head.h:374 [inline] __sync_dirty_buffer+0x2a6/0x320 fs/buffer.c:3178 __ext4_handle_dirty_metadata+0x234/0x590 fs/ext4/ext4_jbd2.c:300 ext4_convert_inline_data_nolock+0x5c9/0xd10 fs/ext4/inline.c:1246 ext4_convert_inline_data+0x347/0x3a0 fs/ext4/inline.c:2033 ext4_fallocate+0x137/0x2150 fs/ext4/extents.c:4962 vfs_fallocate+0x487/0x9a0 fs/open.c:308 ksys_fallocate fs/open.c:331 [inline] __do_sys_fallocate fs/open.c:339 [inline] __se_sys_fallocate fs/open.c:337 [inline] __x64_sys_fallocate+0xcf/0x140 fs/open.c:337 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe hfs: unable to parse mount options RIP: 0033:0x7f36f09fb0c9 Code: Bad RIP value. RSP: 002b:00007f36eef6d168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f36f0b1af80 RCX: 00007f36f09fb0c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00007f36f0a56ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000001000f4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3575f03f R14: 00007f36eef6d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1569: hfs: invalid session number or type of track hfs: can't find a HFS filesystem on dev loop4 #0: 000000004ec8fda4 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 hfs: unable to parse mount options 2 locks held by kworker/u4:4/3568: 1 lock held by in:imklog/7833: #0: 000000004ba66cc7 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 3 locks held by kworker/u4:6/8846: 2 locks held by syz-executor.5/12983: #0: 00000000fc43feb3 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 00000000fc43feb3 (sb_writers#3){.+.+}, at: vfs_fallocate+0x7c0/0x9a0 fs/open.c:307 #1: 00000000f3b1bcf5 (&ei->xattr_sem){++++}, at: ext4_write_lock_xattr fs/ext4/xattr.h:141 [inline] #1: 00000000f3b1bcf5 (&ei->xattr_sem){++++}, at: ext4_convert_inline_data+0x20a/0x3a0 fs/ext4/inline.c:2031 2 locks held by systemd-udevd/18550: #0: 000000002785569b (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 fs/block_dev.c:1478 #1: 00000000b4c251d5 (loop_ctl_mutex){+.+.}, at: lo_open+0x19/0xd0 drivers/block/loop.c:1771 2 locks held by syz-executor.3/18572: #0: 00000000769a87fe (&type->s_umount_key#71){++++}, at: do_remount fs/namespace.c:2307 [inline] #0: 00000000769a87fe (&type->s_umount_key#71){++++}, at: do_mount+0xa5b/0x2f50 fs/namespace.c:2813 #1: 0000000087cc6148 (&cfs_rq->removed.lock){-.-.}, at: update_cfs_rq_load_avg kernel/sched/fair.c:3490 [inline] #1: 0000000087cc6148 (&cfs_rq->removed.lock){-.-.}, at: update_load_avg kernel/sched/fair.c:3612 [inline] #1: 0000000087cc6148 (&cfs_rq->removed.lock){-.-.}, at: dequeue_entity+0x52d/0x2800 kernel/sched/fair.c:4058 hfs: invalid session number or type of track hfs: can't find a HFS filesystem on dev loop4 1 lock held by syz-executor.4/18580: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1569 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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: 18532 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:write_comp_data+0xf/0x70 kernel/kcov.c:122 Code: 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df 01 00 <65> 8b 05 7a 59 9f 7e a9 00 01 1f 00 75 4f 8b 86 60 13 00 00 83 f8 RSP: 0018:ffff88804580f768 EFLAGS: 00000246 RAX: ffff888048146280 RBX: 0000000000000000 RCX: ffffffff818ba030 RDX: 0000000000000000 RSI: ffff888048146280 RDI: 0000000000000001 RBP: ffffea0002a58dc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dead000000000100 R13: ffffea0002a58dc0 R14: dffffc0000000000 R15: 00007f448f7ab000 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb6f5d14000 CR3: 0000000009e6d000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mm_counter_file include/linux/mm.h:1642 [inline] mm_counter include/linux/mm.h:1651 [inline] zap_pte_range mm/memory.c:1349 [inline] zap_pmd_range mm/memory.c:1463 [inline] zap_pud_range mm/memory.c:1492 [inline] zap_p4d_range mm/memory.c:1513 [inline] unmap_page_range+0x1430/0x2c50 mm/memory.c:1534 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f44908200c9 Code: Bad RIP value. RSP: 002b:00007f448ed71218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f4490940058 RCX: 00007f44908200c9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4490940058 RBP: 00007f4490940050 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f449094005c R13: 00007ffcae8b1faf R14: 00007f448ed71300 R15: 0000000000022000