F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT f2fs_msg: 924917 callbacks suppressed F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT INFO: task kworker/u4:2:61 blocked for more than 140 seconds. F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT Not tainted 4.19.211-syzkaller #0 F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT kworker/u4:2 D26920 61 2 0x80000000 F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT Workqueue: writeback wb_workfn (flush-7:2) F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT Call Trace: F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT F2FS-fs (loop2): Inconsistent segment (6) type [1, 0] in SSA and SIT 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/u4:2/61: #0: 0000000067725647 ((wq_completion)"writeback"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 000000003a72cec4 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000b5d9fa4b (&type->s_umount_key#70){.+.+}, at: trylock_super+0x1d/0x100 fs/super.c:412 #3: 00000000b4fbb24d (&sbi->gc_mutex){+.+.}, at: f2fs_balance_fs+0x709/0xd80 fs/f2fs/segment.c:512 1 lock held by khungtaskd/1571: #0: 00000000449409ff (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7867: #0: 000000000319df7e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 3 locks held by syz-executor.2/10184: 2 locks held by syz-executor.5/10329: #0: 00000000b5d9fa4b (&type->s_umount_key#70){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000024856886 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000024856886 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 2 locks held by syz-executor.5/11014: #0: 00000000b5d9fa4b (&type->s_umount_key#70){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000024856886 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000024856886 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 2 locks held by syz-executor.5/11333: #0: 00000000b5d9fa4b (&type->s_umount_key#70){.+.+}, at: iterate_supers+0xdb/0x290 fs/super.c:631 #1: 0000000024856886 (&bdi->wb_switch_rwsem){+.+.}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:338 [inline] #1: 0000000024856886 (&bdi->wb_switch_rwsem){+.+.}, at: sync_inodes_sb+0x180/0x9a0 fs/fs-writeback.c:2457 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10184 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x50 kernel/kcov.c:106 Code: 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 <48> 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 RSP: 0018:ffff8880396972e8 EFLAGS: 00000246 RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc90008b4b000 RDX: 000000000003ffff RSI: ffffffff8316afe9 RDI: 0000000000000004 RBP: ffff88808d210a00 R08: 0000000000000000 R09: 0000000000000006 R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000006 R13: 0000000000000006 R14: dffffc0000000000 R15: 0000000000000017 FS: 00007efedd871700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f18130ef018 CR3: 00000000b4973000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sec_usage_check fs/f2fs/segment.h:789 [inline] get_victim_by_default+0xe39/0x24a0 fs/f2fs/gc.c:365 __get_victim fs/f2fs/gc.c:1046 [inline] f2fs_gc+0x72e/0x8c90 fs/f2fs/gc.c:1191 f2fs_balance_fs+0x71a/0xd80 fs/f2fs/segment.c:513 f2fs_create+0x44d/0x930 fs/f2fs/namei.c:307 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7efedf2ff0c9 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:00007efedd871168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007efedf41ef80 RCX: 00007efedf2ff0c9 RDX: 000000000000275a RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007efedf35aae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd15d82a3f R14: 00007efedd871300 R15: 0000000000022000