./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor288900206 <...> Warning: Permanently added '10.128.0.189' (ED25519) to the list of known hosts. execve("./syz-executor288900206", ["./syz-executor288900206"], 0x7fff877119c0 /* 10 vars */) = 0 brk(NULL) = 0x555559c50000 brk(0x555559c50d00) = 0x555559c50d00 arch_prctl(ARCH_SET_FS, 0x555559c50380) = 0 set_tid_address(0x555559c50650) = 5859 set_robust_list(0x555559c50660, 24) = 0 rseq(0x555559c50ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor288900206", 4096) = 27 getrandom("\x69\x8f\x3d\xd7\xfe\xd5\x49\x62", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555559c50d00 brk(0x555559c71d00) = 0x555559c71d00 brk(0x555559c72000) = 0x555559c72000 mprotect(0x7f9b439ef000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5860 attached , child_tidptr=0x555559c50650) = 5860 [pid 5860] set_robust_list(0x555559c50660, 24) = 0 [pid 5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5860] setpgid(0, 0) = 0 [pid 5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5860] write(3, "1000", 4) = 4 [pid 5860] close(3) = 0 executing program [pid 5860] write(1, "executing program\n", 18) = 18 [pid 5860] memfd_create("syzkaller", 0) = 3 [pid 5860] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9b3b400000 [pid 5860] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 20699119) = 20699119 [pid 5860] munmap(0x7f9b3b400000, 138412032) = 0 [pid 5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5860] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5860] close(3) = 0 [pid 5860] close(4) = 0 [pid 5860] mkdir("./file1", 0777) = 0 [ 100.056153][ T5860] loop0: detected capacity change from 0 to 40427 [ 100.098887][ T5860] F2FS-fs: inline encryption not supported [ 100.105899][ T5860] F2FS-fs (loop0): build fault injection rate: 19 [ 100.114468][ T5860] F2FS-fs (loop0): build fault injection type: 0x3bfe8c [ 100.128277][ T5860] F2FS-fs (loop0): invalid crc value [ 100.143898][ T5860] F2FS-fs (loop0): inject page alloc in f2fs_grab_cache_folio of f2fs_ra_meta_pages+0x615/0x970 [pid 5860] mount("/dev/loop0", "./file1", "f2fs", MS_NOEXEC, "nodiscard,extent_cache,inlinecrypt,active_logs=6,flush_merge,fault_injection=00000000000000000023,di"...) = 0 [pid 5860] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5860] chdir("./file1") = 0 [pid 5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 100.187397][ T5860] F2FS-fs (loop0): inject slab alloc in f2fs_kmem_cache_alloc of read_node_folio+0x20a/0x3f0 [ 100.201161][ T5860] F2FS-fs (loop0): f2fs_recover_fsync_data: recovery fsync data, check_only: 0 [ 100.211967][ T5860] F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5 [pid 5860] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_SYNC, 0221) = 4 [ 100.245689][ T5860] F2FS-fs (loop0): inject slab alloc in f2fs_kmem_cache_alloc of f2fs_new_node_folio+0x1d9/0xa40 [ 100.267598][ T5860] F2FS-fs (loop0): inject inconsistent footer in sanity_check_node_footer of f2fs_write_begin+0x952/0x2290 [ 100.279113][ T5860] F2FS-fs (loop0): inconsistent node block, node_type:1, nid:10, node_footer[nid:10,ino:10,ofs:0,cpver:0,blkaddr:0] [ 100.295224][ T5861] F2FS-fs (loop0): inject inconsistent footer in sanity_check_node_footer of f2fs_get_dnode_of_data+0x23a/0x1b50 [ 100.307285][ T5861] F2FS-fs (loop0): inconsistent node block, node_type:1, nid:3, node_footer[nid:3,ino:3,ofs:0,cpver:1219692001,blkaddr:4098] [pid 5860] pwrite64(4, "\x32\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 65007, 3708 [pid 5859] kill(-5860, SIGKILL) = 0 [pid 5859] kill(5860, SIGKILL) = 0 [pid 5859] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5859] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5859] getdents64(3, 0x555559c516f0 /* 2 entries */, 32768) = 48 [pid 5859] getdents64(3, 0x555559c516f0 /* 0 entries */, 32768) = 0 [pid 5859] close(3) = 0 [ 286.579874][ T31] INFO: task syz-executor288:5860 blocked for more than 143 seconds. [ 286.588112][ T31] Not tainted 6.16.0-rc6-next-20250714-syzkaller #0 [ 286.596421][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.605366][ T31] task:syz-executor288 state:D stack:24648 pid:5860 tgid:5860 ppid:5859 task_flags:0x400140 flags:0x00004006 [ 286.617660][ T31] Call Trace: [ 286.621191][ T31] [ 286.624150][ T31] __schedule+0x16f5/0x4d00 [ 286.628718][ T31] ? schedule+0x165/0x360 [ 286.633628][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.638601][ T31] ? __pfx___schedule+0x10/0x10 [ 286.643876][ T31] ? schedule+0x91/0x360 [ 286.648150][ T31] schedule+0x165/0x360 [ 286.652757][ T31] schedule_timeout+0x9a/0x270 [ 286.657545][ T31] ? __pfx_schedule_timeout+0x10/0x10 [ 286.663330][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.668552][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.674149][ T31] ? wait_for_completion+0x267/0x5d0 [ 286.679462][ T31] wait_for_completion+0x2bf/0x5d0 [ 286.684982][ T31] ? __pfx_wait_for_completion+0x10/0x10 [ 286.690887][ T31] ? autoremove_wake_function+0x39/0x100 [ 286.696641][ T31] ? __wake_up_common_lock+0x190/0x1f0 [ 286.702494][ T31] f2fs_issue_checkpoint+0x376/0x570 [ 286.707824][ T31] ? __pfx_f2fs_issue_checkpoint+0x10/0x10 [ 286.714160][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.719066][ T31] ? __up_read+0x280/0x680 [ 286.723922][ T31] ? f2fs_sync_fs+0x200/0x3d0 [ 286.728629][ T31] f2fs_do_sync_file+0x869/0x1860 [ 286.734048][ T31] ? __pfx_f2fs_do_sync_file+0x10/0x10 [ 286.739580][ T31] ? f2fs_file_write_iter+0x4a9/0x2410 [ 286.745411][ T31] ? vfs_fsync_range+0x12c/0x1c0 [ 286.750627][ T31] ? f2fs_sync_file+0xe9/0x160 [ 286.755423][ T31] f2fs_file_write_iter+0x74d/0x2410 [ 286.761123][ T31] ? __pfx_f2fs_file_write_iter+0x10/0x10 [ 286.766869][ T31] ? rcu_read_lock_any_held+0xb3/0x120 [ 286.772761][ T31] vfs_write+0x548/0xa90 [ 286.777141][ T31] ? __pfx_f2fs_file_write_iter+0x10/0x10 [ 286.783344][ T31] ? __pfx_vfs_write+0x10/0x10 [ 286.788141][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.793913][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.799159][ T31] __x64_sys_pwrite64+0x193/0x220 [ 286.804593][ T31] ? __pfx___x64_sys_pwrite64+0x10/0x10 [ 286.811040][ T31] do_syscall_64+0xfa/0x3b0 [ 286.815578][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.821250][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.827455][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.832712][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.838643][ T31] RIP: 0033:0x7f9b43976b19 [ 286.843582][ T31] RSP: 002b:00007ffee8c2a118 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 [ 286.852395][ T31] RAX: ffffffffffffffda RBX: 0000200000000040 RCX: 00007f9b43976b19 [ 286.860651][ T31] RDX: 000000000000fdef RSI: 0000200000000140 RDI: 0000000000000004 [ 286.868649][ T31] RBP: 0031656c69662f2e R08: 0000555559c514c0 R09: 0000555559c514c0 [ 286.877063][ T31] R10: 0000000000000e7c R11: 0000000000000246 R12: 00007ffee8c2a140 [ 286.885384][ T31] R13: 00007ffee8c2a368 R14: 431bde82d7b634db R15: 00007f9b439bf03b [ 286.893648][ T31] [ 286.896699][ T31] [ 286.896699][ T31] Showing all locks held in the system: [ 286.905086][ T31] 1 lock held by khungtaskd/31: [ 286.910316][ T31] #0: ffffffff8e13eca0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.920665][ T31] 3 locks held by kworker/u8:6/1102: [ 286.925977][ T31] #0: ffff8881404f4948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 286.937947][ T31] #1: ffffc90003c6fbc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 286.950861][ T31] #2: ffff8880292d40e0 (&type->s_umount_key#42){.+.+}-{4:4}, at: super_trylock_shared+0x20/0xf0 [ 286.961900][ T31] 2 locks held by getty/5605: [ 286.966785][ T31] #0: ffff88803009b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.976977][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.987371][ T31] 1 lock held by syz-executor288/5860: [ 286.993193][ T31] #0: ffff8880292d4428 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 [ 287.002357][ T31] 2 locks held by f2fs_ckpt-7:0/5861: [ 287.007835][ T31] [ 287.010510][ T31] ============================================= [ 287.010510][ T31] [ 287.018947][ T31] NMI backtrace for cpu 1 [ 287.018966][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250714-syzkaller #0 PREEMPT(full) [ 287.018987][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.018998][ T31] Call Trace: [ 287.019007][ T31] [ 287.019016][ T31] dump_stack_lvl+0x189/0x250 [ 287.019041][ T31] ? __wake_up_klogd+0xd9/0x110 [ 287.019070][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.019091][ T31] ? __pfx__printk+0x10/0x10 [ 287.019130][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.019154][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.019171][ T31] ? _printk+0xcf/0x120 [ 287.019200][ T31] ? __pfx__printk+0x10/0x10 [ 287.019226][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.019256][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.019279][ T31] watchdog+0xfee/0x1030 [ 287.019307][ T31] ? watchdog+0x1de/0x1030 [ 287.019342][ T31] kthread+0x70e/0x8a0 [ 287.019370][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.019394][ T31] ? __pfx_kthread+0x10/0x10 [ 287.019420][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.019442][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.019471][ T31] ? __pfx_kthread+0x10/0x10 [ 287.019495][ T31] ret_from_fork+0x3f9/0x770 [ 287.019517][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.019542][ T31] ? __switch_to_asm+0x39/0x70 [ 287.019563][ T31] ? __switch_to_asm+0x33/0x70 [ 287.019584][ T31] ? __pfx_kthread+0x10/0x10 [ 287.019608][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.019648][ T31] [ 287.171185][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.176423][ C0] NMI backtrace for cpu 0 [ 287.176439][ C0] CPU: 0 UID: 0 PID: 5861 Comm: f2fs_ckpt-7:0 Not tainted 6.16.0-rc6-next-20250714-syzkaller #0 PREEMPT(full) [ 287.176456][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.176465][ C0] RIP: 0010:xas_reload+0x19a/0x470 [ 287.176490][ C0] Code: ff e8 ba 15 7f 09 89 c5 31 ff 89 c6 e8 1f a4 c7 ff 85 ed 0f 84 14 01 00 00 e8 d2 9f c7 ff e9 5a 02 00 00 e8 c8 9f c7 ff eb 1d 31 53 ad ff 89 c5 31 ff 89 c6 e8 f6 a3 c7 ff 85 ed 0f 84 27 01 [ 287.176502][ C0] RSP: 0018:ffffc9000414f528 EFLAGS: 00000246 [ 287.176517][ C0] RAX: ffffffff81f82547 RBX: ffffea0001c272c0 RCX: 0000000000000000 [ 287.176528][ C0] RDX: ffff8880792bbc00 RSI: 0000000000000000 RDI: 0000000000000000 [ 287.176538][ C0] RBP: 0000000000000000 R08: ffffea0001c272f7 R09: 1ffffd4000384e5e [ 287.176548][ C0] R10: dffffc0000000000 R11: fffff94000384e5f R12: ffff888075e30240 [ 287.176558][ C0] R13: 1ffff92000829eb0 R14: ffffc9000414f580 R15: ffff888025979e40 [ 287.176568][ C0] FS: 0000000000000000(0000) GS:ffff888125bed000(0000) knlGS:0000000000000000 [ 287.176580][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.176590][ C0] CR2: 00007fe4c0415fb3 CR3: 000000000df38000 CR4: 00000000003526f0 [ 287.176606][ C0] Call Trace: [ 287.176615][ C0] [ 287.176620][ C0] ? filemap_get_entry+0xad/0x2f0 [ 287.176643][ C0] filemap_get_entry+0x1c4/0x2f0 [ 287.176662][ C0] ? __pfx_filemap_get_entry+0x10/0x10 [ 287.176684][ C0] ? do_raw_spin_unlock+0x122/0x240 [ 287.176704][ C0] ? _raw_spin_unlock+0x28/0x50 [ 287.176722][ C0] __filemap_get_folio+0x68/0xaf0 [ 287.176742][ C0] ? sync_inode_metadata+0xb9/0x110 [ 287.176760][ C0] f2fs_grab_cache_folio+0x2b/0x380 [ 287.176783][ C0] __get_node_folio+0x194/0x1410 [ 287.176809][ C0] ? __pfx___get_node_folio+0x10/0x10 [ 287.176836][ C0] f2fs_update_inode_page+0x82/0x190 [ 287.176851][ C0] ? f2fs_write_checkpoint+0xb66/0x1df0 [ 287.176869][ C0] f2fs_write_checkpoint+0xb6e/0x1df0 [ 287.176896][ C0] ? __pfx_f2fs_write_checkpoint+0x10/0x10 [ 287.176913][ C0] ? lockdep_unlock+0x89/0x120 [ 287.176947][ C0] ? down_write+0x162/0x1f0 [ 287.176966][ C0] ? __pfx_down_write+0x10/0x10 [ 287.176985][ C0] ? __pfx___schedule+0x10/0x10 [ 287.177004][ C0] __checkpoint_and_complete_reqs+0xd9/0x3b0 [ 287.177025][ C0] ? __pfx___checkpoint_and_complete_reqs+0x10/0x10 [ 287.177050][ C0] issue_checkpoint_thread+0xd9/0x260 [ 287.177070][ C0] ? __pfx_issue_checkpoint_thread+0x10/0x10 [ 287.177088][ C0] ? __pfx_autoremove_wake_function+0x10/0x10 [ 287.177107][ C0] ? __kthread_parkme+0x7b/0x200 [ 287.177123][ C0] ? __kthread_parkme+0x1a1/0x200 [ 287.177141][ C0] kthread+0x70e/0x8a0 [ 287.177160][ C0] ? __pfx_issue_checkpoint_thread+0x10/0x10 [ 287.177178][ C0] ? __pfx_kthread+0x10/0x10 [ 287.177196][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.177211][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.177235][ C0] ? __pfx_kthread+0x10/0x10 [ 287.177253][ C0] ret_from_fork+0x3f9/0x770 [ 287.177268][ C0] ? __pfx_ret_from_fork+0x10/0x10 [ 287.177285][ C0] ? __switch_to_asm+0x39/0x70 [ 287.177302][ C0] ? __switch_to_asm+0x33/0x70 [ 287.177318][ C0] ? __pfx_kthread+0x10/0x10 [ 287.177335][ C0] ret_from_fork_asm+0x1a/0x30 [ 287.177359][ C0] [ 287.500451][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.507331][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250714-syzkaller #0 PREEMPT(full) [ 287.518901][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.529066][ T31] Call Trace: [ 287.532363][ T31] [ 287.535309][ T31] dump_stack_lvl+0x99/0x250 [ 287.539920][ T31] ? __asan_memcpy+0x40/0x70 [ 287.544531][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.549838][ T31] ? __pfx__printk+0x10/0x10 [ 287.554469][ T31] vpanic+0x281/0x750 [ 287.558498][ T31] ? __pfx_vpanic+0x10/0x10 [ 287.563017][ T31] ? preempt_schedule+0xae/0xc0 [ 287.567947][ T31] ? preempt_schedule_common+0x83/0xd0 [ 287.573617][ T31] panic+0xb9/0xc0 [ 287.577355][ T31] ? __pfx_panic+0x10/0x10 [ 287.581793][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.587285][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 287.593461][ T31] watchdog+0x102d/0x1030 [ 287.597939][ T31] ? watchdog+0x1de/0x1030 [ 287.602396][ T31] kthread+0x70e/0x8a0 [ 287.606510][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.611214][ T31] ? __pfx_kthread+0x10/0x10 [ 287.615942][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.621171][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.626395][ T31] ? __pfx_kthread+0x10/0x10 [ 287.631010][ T31] ret_from_fork+0x3f9/0x770 [ 287.635886][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.641019][ T31] ? __switch_to_asm+0x39/0x70 [ 287.645908][ T31] ? __switch_to_asm+0x33/0x70 [ 287.650691][ T31] ? __pfx_kthread+0x10/0x10 [ 287.655412][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.660230][ T31] [ 287.663578][ T31] Kernel Offset: disabled [ 287.667904][ T31] Rebooting in 86400 seconds..