F2FS-fs (loop5): sanity_check_inode: inode (ino=8) has corrupted i_extra_isize: 36, max: 24
F2FS-fs (loop5): sanity_check_inode: inode (ino=8) has corrupted i_extra_isize: 36, max: 24
F2FS-fs (loop5): sanity_check_inode: inode (ino=8) has corrupted i_extra_isize: 36, max: 24
INFO: task kworker/u4:1:23 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.
kworker/u4:1    D26144    23      2 0x80000000
Workqueue: writeback wb_workfn (flush-7:5)
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
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
 f2fs_balance_fs+0x709/0xd80 fs/f2fs/segment.c:512
 f2fs_write_inode+0x500/0x600 fs/f2fs/inode.c:630
 write_inode fs/fs-writeback.c:1244 [inline]
 __writeback_single_inode+0x733/0x11d0 fs/fs-writeback.c:1442
 writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647
 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1716
 wb_writeback+0x841/0xcc0 fs/fs-writeback.c:1822
 wb_check_old_data_flush fs/fs-writeback.c:1924 [inline]
 wb_do_writeback fs/fs-writeback.c:1977 [inline]
 wb_workfn+0x8ba/0x1250 fs/fs-writeback.c:2006
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

Showing all locks held in the system:
4 locks held by kworker/u4:1/23:
 #0: 00000000dea3bdae ((wq_completion)"writeback"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
 #1: 00000000bc714262 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
 #2: 000000006721477f (&type->s_umount_key#89){++++}, at: trylock_super+0x1d/0x100 fs/super.c:412
 #3: 000000005c723bc4 (&sbi->gc_mutex){+.+.}, at: f2fs_balance_fs+0x709/0xd80 fs/f2fs/segment.c:512
1 lock held by khungtaskd/1569:
 #0: 00000000dd3c7d1d (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7800:
 #0: 00000000688f6d86 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
3 locks held by syz-executor.5/17514:
2 locks held by syz-executor.2/19160:
 #0: 000000006721477f (&type->s_umount_key#89){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline]
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457
2 locks held by syz-executor.2/19163:
 #0: 000000006721477f (&type->s_umount_key#89){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline]
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457
2 locks held by syz-executor.2/19251:
 #0: 000000006721477f (&type->s_umount_key#89){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline]
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457
2 locks held by syz-executor.2/19623:
 #0: 000000006721477f (&type->s_umount_key#89){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline]
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457
2 locks held by syz-executor.2/19624:
 #0: 000000006721477f (&type->s_umount_key#89){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline]
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457
2 locks held by syz-executor.2/19626:
 #0: 000000006721477f (&type->s_umount_key#89){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline]
 #1: 00000000c143e7a5 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457

=============================================

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 02/16/2023
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: 17514 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
RIP: 0010:lockdep_hardirqs_off+0x6e/0x2c0 kernel/locking/lockdep.c:2895
Code: 85 ff 0f 84 97 01 00 00 65 4c 8b 24 25 c0 df 01 00 49 8d bc 24 84 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e5
RSP: 0018:ffff8880ba007e48 EFLAGS: 00000803
RAX: dffffc0000000000 RBX: ffff88809be5a300 RCX: 1ffffffff148be2c
RDX: 1ffff110137cb570 RSI: ffffffff8167adc4 RDI: ffff88809be5ab84
RBP: ffffffff81549347 R08: ffffffff8cd54e80 R09: 0000000000000000
R10: 0000000000000005 R11: ffffffff8c66501b R12: ffff88809be5a300
R13: 1ffffffff13e3052 R14: 0000000000000000 R15: ffff8880ba024d30
FS:  00007f74c149f700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f608cfa7000 CR3: 000000009f16c000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline]
 read_seqcount_begin include/linux/seqlock.h:164 [inline]
 ktime_get+0x137/0x2f0 kernel/time/timekeeping.c:756
 clockevents_program_event+0x141/0x350 kernel/time/clockevents.c:336
 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:48
 hrtimer_interrupt+0x40a/0x9e0 kernel/time/hrtimer.c:1598
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline]
 smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline]
RIP: 0010:lock_acquire+0x1ec/0x3c0 kernel/locking/lockdep.c:3911
Code: 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 b7 01 00 00 48 83 3d 09 2e a6 08 00 0f 84 2a 01 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b
RSP: 0018:ffff88804a876608 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3051 RBX: ffff88809be5a300 RCX: 000000000000421f
RDX: dffffc0000000000 RSI: 0000000036f4f31e RDI: 0000000000000286
RBP: ffff8880976d13e8 R08: ffffffff8cd38638 R09: 0000000000000002
R10: ffff88809be5abd8 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 down_read+0x36/0x80 kernel/locking/rwsem.c:24
 check_valid_map fs/f2fs/gc.c:454 [inline]
 gc_data_segment fs/f2fs/gc.c:929 [inline]
 do_garbage_collect fs/f2fs/gc.c:1109 [inline]
 f2fs_gc+0x1cf3/0x8c90 fs/f2fs/gc.c:1196
 f2fs_balance_fs+0x71a/0xd80 fs/f2fs/segment.c:513
 __write_data_page+0xab8/0x22d0 fs/f2fs/data.c:1975
 f2fs_write_cache_pages+0x96e/0x13e0 fs/f2fs/data.c:2107
 __f2fs_write_data_pages fs/f2fs/data.c:2217 [inline]
 f2fs_write_data_pages+0xcc3/0x1060 fs/f2fs/data.c:2244
 do_writepages+0xe5/0x290 mm/page-writeback.c:2344
 __filemap_fdatawrite_range+0x27d/0x350 mm/filemap.c:446
 file_write_and_wait_range+0x93/0x100 mm/filemap.c:776
 f2fs_do_sync_file+0x2eb/0x2550 fs/f2fs/file.c:228
 f2fs_sync_file+0x136/0x190 fs/f2fs/file.c:334
 vfs_fsync_range+0x13a/0x220 fs/sync.c:197
 generic_write_sync include/linux/fs.h:2750 [inline]
 f2fs_file_write_iter+0x64b/0xbe0 fs/f2fs/file.c:3044
 call_write_iter include/linux/fs.h:1821 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x51b/0x770 fs/read_write.c:487
 __kernel_write+0x109/0x370 fs/read_write.c:506
 dump_emit+0x183/0x300 fs/coredump.c:801
 elf_core_dump+0x33c0/0x4c10 fs/binfmt_elf.c:2392
 do_coredump+0x1d4e/0x2d60 fs/coredump.c:765
 get_signal+0xed9/0x1f70 kernel/signal.c:2583
 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: 0033:0x7f74c736f0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f74c149f168 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffe5 RBX: 00007f74c748f120 RCX: 00007f74c736f0f9
RDX: 0000000000000000 RSI: 7fffffffffffffff RDI: 0000000000000009
RBP: 00007f74c73caae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe794c58ff R14: 00007f74c149f300 R15: 0000000000022000