INFO: task syz-executor.5:28031 blocked for more than 143 seconds. Not tainted 5.19.0-rc8-syzkaller-00155-g6a010258447d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29080 pid:28031 ppid: 3641 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0xa00/0x4b50 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x378/0x530 kernel/sched/completion.c:106 f2fs_issue_checkpoint+0x363/0x460 fs/f2fs/checkpoint.c:1867 f2fs_sync_fs+0x20f/0x420 fs/f2fs/super.c:1622 sync_fs_one_sb fs/sync.c:84 [inline] sync_fs_one_sb+0x107/0x140 fs/sync.c:80 iterate_supers+0x13c/0x290 fs/super.c:694 ksys_sync+0xa8/0x150 fs/sync.c:104 __do_sys_sync+0xa/0x10 fs/sync.c:113 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f26de889209 RSP: 002b:00007f26df986168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f26de99bf60 RCX: 00007f26de889209 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f26de8e3161 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe12cf47df R14: 00007f26df986300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/28: #0: ffffffff8bd846e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491 2 locks held by getty/3285: #0: ffff88814aab4098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90001c582e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124 2 locks held by kworker/u4:0/7063: #0: ffff8880b9a39f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:544 #1: ffff8880b9a277c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3e7/0x4e0 kernel/sched/psi.c:889 3 locks held by kworker/0:6/14419: 2 locks held by f2fs_ckpt-7:1/27891: 1 lock held by syz-executor.5/28031: #0: ffff88807a5e80e0 (&type->s_umount_key#98){++++}-{3:3}, at: iterate_supers+0xdb/0x290 fs/super.c:692 1 lock held by syz-executor.5/28097: #0: ffff88807a5e80e0 (&type->s_umount_key#98){++++}-{3:3}, at: iterate_supers+0xdb/0x290 fs/super.c:692 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc8-syzkaller-00155-g6a010258447d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:369 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 27891 Comm: f2fs_ckpt-7:1 Not tainted 5.19.0-rc8-syzkaller-00155-g6a010258447d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:vsnprintf+0xe10/0x1660 lib/vsprintf.c:2828 Code: 51 06 00 00 41 89 ee 4d 03 77 10 83 c5 08 41 89 2f e8 e4 3e 57 fd 4c 89 f0 48 c1 e8 03 80 3c 18 00 0f 85 42 06 00 00 4d 8b 36 22 01 00 00 e8 c6 3e 57 fd 89 ee bf 2f 00 00 00 e8 fa 3a 57 fd RSP: 0018:ffffc9000a2868b8 EFLAGS: 00000046 RAX: 1ffff92001450d45 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff888045d72240 RSI: ffffffff84225a03 RDI: ffffc9000a2869c8 RBP: 0000000000000018 R08: 0000000000000005 R09: 000000000000002f R10: 0000000000000010 R11: 0000000000000001 R12: ffffc9000a286b89 R13: ffffffff89cd3ea5 R14: 0000000000000915 R15: ffffc9000a2869b8 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f69ad16a134 CR3: 0000000022b11000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sprintf+0xc0/0x100 lib/vsprintf.c:2986 print_time kernel/printk/printk.c:1277 [inline] info_print_prefix+0x248/0x340 kernel/printk/printk.c:1303 record_print_text+0x14d/0x3e0 kernel/printk/printk.c:1352 console_emit_next_record.constprop.0+0x6bf/0x840 kernel/printk/printk.c:2715 console_flush_all kernel/printk/printk.c:2794 [inline] console_unlock+0x37a/0x5a0 kernel/printk/printk.c:2861 vprintk_emit+0x1b9/0x5f0 kernel/printk/printk.c:2271 vprintk+0x80/0x90 kernel/printk/printk_safe.c:50 _printk+0xba/0xed kernel/printk/printk.c:2292 printk_stack_address arch/x86/kernel/dumpstack.c:72 [inline] show_trace_log_lvl+0x221/0x2ba arch/x86/kernel/dumpstack.c:276 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 __is_bitmap_valid fs/f2fs/checkpoint.c:155 [inline] f2fs_is_valid_blkaddr.cold+0x37/0x168 fs/f2fs/checkpoint.c:196 f2fs_do_write_data_page+0x653/0x1d90 fs/f2fs/data.c:2631 f2fs_write_single_data_page+0x8ed/0x1780 fs/f2fs/data.c:2785 f2fs_write_cache_pages+0xae2/0x2100 fs/f2fs/data.c:3058 __f2fs_write_data_pages fs/f2fs/data.c:3208 [inline] f2fs_write_data_pages+0x4d5/0x1260 fs/f2fs/data.c:3235 do_writepages+0x1ab/0x690 mm/page-writeback.c:2443 filemap_fdatawrite_wbc mm/filemap.c:388 [inline] filemap_fdatawrite_wbc+0x143/0x1b0 mm/filemap.c:378 __filemap_fdatawrite_range+0xb4/0xf0 mm/filemap.c:421 f2fs_sync_dirty_inodes+0x26e/0xdb0 fs/f2fs/checkpoint.c:1095 block_operations+0x28f/0xc40 fs/f2fs/checkpoint.c:1226 f2fs_write_checkpoint+0x607/0x4c70 fs/f2fs/checkpoint.c:1635 __write_checkpoint_sync fs/f2fs/checkpoint.c:1752 [inline] __checkpoint_and_complete_reqs+0xea/0x350 fs/f2fs/checkpoint.c:1771 issue_checkpoint_thread+0xdf/0x250 fs/f2fs/checkpoint.c:1802 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306