F2FS-fs (loop1): sanity_check_inode: inode (ino=8) has corrupted i_extra_isize: 36, max: 12 F2FS-fs (loop1): sanity_check_inode: inode (ino=8) has corrupted i_extra_isize: 36, max: 12 F2FS-fs (loop1): sanity_check_inode: inode (ino=8) has corrupted i_extra_isize: 36, max: 12 INFO: task syz-executor.1:7999 blocked for more than 140 seconds. Not tainted 4.14.296-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D24096 7999 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 wb_wait_for_completion fs/fs-writeback.c:222 [inline] wb_wait_for_completion+0x118/0x170 fs/fs-writeback.c:218 __writeback_inodes_sb_nr+0x164/0x1d0 fs/fs-writeback.c:2343 __sync_filesystem fs/sync.c:36 [inline] sync_filesystem fs/sync.c:64 [inline] sync_filesystem+0x8c/0x230 fs/sync.c:48 generic_shutdown_super+0x70/0x370 fs/super.c:432 kill_block_super+0x95/0xe0 fs/super.c:1161 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f90d466aa17 RSP: 002b:00007ffc22891188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f90d466aa17 RDX: 00007ffc22891259 RSI: 000000000000000a RDI: 00007ffc22891250 RBP: 00007ffc22891250 R08: 00000000ffffffff R09: 00007ffc22891020 R10: 0000555555dae903 R11: 0000000000000246 R12: 00007f90d46c3826 R13: 00007ffc22892310 R14: 0000555555dae810 R15: 00007ffc22892350 Showing all locks held in the system: 1 lock held by khungtaskd/1515: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by syz-executor.1/7999: #0: (&type->s_umount_key#63){++++}, at: [] deactivate_super+0x77/0xa0 fs/super.c:349 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1515 Comm: khungtaskd Not tainted 4.14.296-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 22 Comm: kworker/u4:1 Not tainted 4.14.296-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Workqueue: writeback wb_workfn (flush-7:1) task: ffff8880b55f65c0 task.stack: ffff8880b5600000 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:60 RSP: 0018:ffff8880b5607138 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: fffffbfff17d9db8 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000282 RBP: ffff8880983c2388 R08: ffff8880b55f65c0 R09: dffffc0000000000 R10: 0000000000000000 R11: ffff8880b55f65c0 R12: 0000000000000200 R13: ffff888098712500 R14: dffffc0000000000 R15: ffff8880983fc55c FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0243d90020 CR3: 00000000b3451000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: gc_data_segment fs/f2fs/gc.c:818 [inline] do_garbage_collect+0x1a59/0x38f0 fs/f2fs/gc.c:978 f2fs_gc+0x7db/0x1eb0 fs/f2fs/gc.c:1060 f2fs_balance_fs+0x423/0x5a0 fs/f2fs/segment.c:436 __write_data_page+0x646/0x1480 fs/f2fs/data.c:1615 f2fs_write_cache_pages+0x40d/0xe50 fs/f2fs/data.c:1744 __f2fs_write_data_pages+0x2e2/0xb90 fs/f2fs/data.c:1838 do_writepages+0xc3/0x240 mm/page-writeback.c:2361 __writeback_single_inode+0xda/0x1010 fs/fs-writeback.c:1382 writeback_sb_inodes+0x48b/0xd30 fs/fs-writeback.c:1645 wb_writeback+0x243/0xb80 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1952 [inline] wb_workfn+0x2bd/0xf50 fs/fs-writeback.c:1988 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: ff ff 48 89 df e8 e1 bd 29 00 e9 9f fe ff ff 4c 89 e7 e8 d4 bd 29 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <65> 48 8b 04 25 c0 7f 02 00 48 85 c0 74 1a 65 8b 15 7b 37 ad 7e