./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor243557073 <...> forked to background, child pid 4653 no interfaces have a carrier [ 21.449447][ T4654] 8021q: adding VLAN 0 to HW filter on device bond0 [ 21.459204][ T4654] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.229' (ECDSA) to the list of known hosts. execve("./syz-executor243557073", ["./syz-executor243557073"], 0x7fff3216bfc0 /* 10 vars */) = 0 brk(NULL) = 0x555555f51000 brk(0x555555f51c40) = 0x555555f51c40 arch_prctl(ARCH_SET_FS, 0x555555f51300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor243557073", 4096) = 27 brk(0x555555f72c40) = 0x555555f72c40 brk(0x555555f73000) = 0x555555f73000 mprotect(0x7f3216c41000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 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, child_tidptr=0x555555f515d0) = 5076 ./strace-static-x86_64: Process 5076 attached [pid 5076] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5076] setpgid(0, 0) = 0 [pid 5076] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "1000", 4) = 4 [pid 5076] close(3) = 0 [pid 5076] memfd_create("syzkaller", 0) = 3 [pid 5076] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f320e786000 [pid 5076] 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"..., 1048576) = 1048576 [pid 5076] munmap(0x7f320e786000, 1048576) = 0 [pid 5076] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5076] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5076] close(3) = 0 [pid 5076] mkdir("./file0", 0777) = 0 syzkaller login: [ 41.639008][ T5076] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5076 'syz-executor243' [ 41.658819][ T5076] loop0: detected capacity change from 0 to 2048 [ 41.668494][ T5076] EXT4-fs: Ignoring removed nobh option [pid 5076] mount("/dev/loop0", "./file0", "ext4", MS_NOSUID|MS_SYNCHRONOUS|MS_NOATIME|MS_NODIRATIME, "data_err=abort,bsdgroups,data_err=ignore,nodelalloc,init_itable=0x0000000000000007,nogrpid,nobh,resg"...) = 0 [pid 5076] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5076] chdir("./file0") = 0 [pid 5076] ioctl(4, LOOP_CLR_FD) = 0 [pid 5076] close(4) = 0 [pid 5076] openat(AT_FDCWD, "cpuset.effective_cpus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [pid 5076] write(4, "0xfffffffffffffffd", 18) = 18 [ 41.684058][ T5076] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. [pid 5076] ioctl(4, _IOC(_IOC_WRITE, 0x58, 0x29, 0x30), 0x20000000 [pid 5074] kill(-5076, SIGKILL) = 0 [pid 5074] kill(5076, SIGKILL) = 0 [pid 5074] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5074] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5074] getdents64(3, 0x555555f52620 /* 2 entries */, 32768) = 48 [pid 5074] getdents64(3, 0x555555f52620 /* 0 entries */, 32768) = 0 [pid 5074] close(3) = 0 [ 70.423571][ T892] cfg80211: failed to load regulatory.db [ 285.460327][ T28] INFO: task syz-executor243:5076 blocked for more than 143 seconds. [ 285.468609][ T28] Not tainted 6.3.0-rc2-syzkaller-00050-g9c1bec9c0b08 #0 [ 285.476209][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 285.484972][ T28] task:syz-executor243 state:D stack:26112 pid:5076 ppid:5074 flags:0x00004004 [ 285.494277][ T28] Call Trace: [ 285.497553][ T28] [ 285.500521][ T28] __schedule+0xc91/0x5770 [ 285.505020][ T28] ? find_held_lock+0x2d/0x110 [ 285.509781][ T28] ? io_schedule_timeout+0x150/0x150 [ 285.515104][ T28] ? lock_downgrade+0x690/0x690 [ 285.519988][ T28] ? mark_held_locks+0x9f/0xe0 [ 285.524773][ T28] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 285.530611][ T28] schedule+0xde/0x1a0 [ 285.534663][ T28] io_schedule+0xbe/0x130 [ 285.538970][ T28] bit_wait_io+0x16/0xe0 [ 285.543238][ T28] __wait_on_bit_lock+0x11f/0x1a0 [ 285.548356][ T28] ? out_of_line_wait_on_bit_timeout+0x170/0x170 [ 285.554727][ T28] out_of_line_wait_on_bit_lock+0xd9/0x110 [ 285.560561][ T28] ? __wait_on_bit_lock+0x1a0/0x1a0 [ 285.565743][ T28] ? cpuacct_css_alloc+0x160/0x160 [ 285.570887][ T28] ? _raw_spin_unlock+0x28/0x40 [ 285.575769][ T28] __sync_dirty_buffer+0x30e/0x380 [ 285.580921][ T28] __ext4_handle_dirty_metadata+0x2b7/0x8e0 [ 285.586861][ T28] ? __ext4_journal_get_create_access+0x182/0x1f0 [ 285.593703][ T28] ext4_convert_inline_data_nolock+0x6e6/0xf10 [ 285.599903][ T28] ? ext4_destroy_inline_data_nolock+0x580/0x580 [ 285.606276][ T28] ? rwsem_down_write_slowpath+0x1220/0x1220 [ 285.612290][ T28] ? __ext4_journal_start_sb+0x1fc/0x5d0 [ 285.617941][ T28] ? ext4_convert_inline_data+0x316/0x5f0 [ 285.623724][ T28] ext4_convert_inline_data+0x51a/0x5f0 [ 285.629305][ T28] ? ext4_inline_data_truncate+0xd70/0xd70 [ 285.635155][ T28] ? rwsem_down_write_slowpath+0x1220/0x1220 [ 285.641198][ T28] ? aa_path_link+0x2f0/0x2f0 [ 285.645866][ T28] ext4_fallocate+0x19f/0x3d90 [ 285.650671][ T28] ? ext4_ext_truncate+0x400/0x400 [ 285.655808][ T28] ? ext4_ext_truncate+0x400/0x400 [ 285.660973][ T28] vfs_fallocate+0x48b/0xe40 [ 285.665595][ T28] ioctl_preallocate+0x18e/0x200 [ 285.670568][ T28] ? fiemap_prep+0x220/0x220 [ 285.675185][ T28] do_vfs_ioctl+0x1306/0x1670 [ 285.679864][ T28] ? vfs_fileattr_set+0xc40/0xc40 [ 285.684956][ T28] ? find_held_lock+0x2d/0x110 [ 285.689777][ T28] ? name_to_dev_t+0x362/0x9d0 [ 285.694641][ T28] ? lock_downgrade+0x690/0x690 [ 285.699523][ T28] ? bpf_lsm_file_ioctl+0x9/0x10 [ 285.704784][ T28] __x64_sys_ioctl+0x10c/0x210 [ 285.709574][ T28] do_syscall_64+0x39/0xb0 [ 285.714112][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 285.720039][ T28] RIP: 0033:0x7f3216bd3569 [ 285.724478][ T28] RSP: 002b:00007ffd7df0af68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 285.732965][ T28] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3216bd3569 [ 285.741105][ T28] RDX: 0000000020000000 RSI: 0000000040305829 RDI: 0000000000000004 [ 285.749346][ T28] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 [ 285.757386][ T28] R10: 0000000000000012 R11: 0000000000000246 R12: 00007ffd7df0af90 [ 285.765383][ T28] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 285.773411][ T28] [ 285.776448][ T28] [ 285.776448][ T28] Showing all locks held in the system: [ 285.784205][ T28] 1 lock held by rcu_tasks_kthre/12: [ 285.789491][ T28] #0: ffffffff8c794b70 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 [ 285.799979][ T28] 1 lock held by rcu_tasks_trace/13: [ 285.805313][ T28] #0: ffffffff8c794870 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 [ 285.816582][ T28] 1 lock held by khungtaskd/28: [ 285.821477][ T28] #0: ffffffff8c7956c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 [ 285.831409][ T28] 2 locks held by getty/4755: [ 285.836201][ T28] #0: ffff88802b478098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 [ 285.846008][ T28] #1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 [ 285.856161][ T28] 3 locks held by syz-executor243/5076: [ 285.861742][ T28] #0: ffff88807c5c4460 (sb_writers#4){.+.+}-{0:0}, at: ioctl_preallocate+0x18e/0x200 [ 285.871363][ T28] #1: ffff888077224030 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0x197/0x3d90 [ 285.882158][ T28] #2: ffff888077223cf8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x352/0x5f0 [ 285.892664][ T28] [ 285.894985][ T28] ============================================= [ 285.894985][ T28] [ 285.903425][ T28] NMI backtrace for cpu 0 [ 285.907749][ T28] CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc2-syzkaller-00050-g9c1bec9c0b08 #0 [ 285.917535][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 285.927579][ T28] Call Trace: [ 285.930848][ T28] [ 285.933763][ T28] dump_stack_lvl+0xd9/0x150 [ 285.938344][ T28] nmi_cpu_backtrace+0x29c/0x350 [ 285.943272][ T28] ? lapic_can_unplug_cpu+0xa0/0xa0 [ 285.948454][ T28] nmi_trigger_cpumask_backtrace+0x2a4/0x300 [ 285.954417][ T28] watchdog+0xe16/0x1090 [ 285.958644][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 285.964609][ T28] kthread+0x2e8/0x3a0 [ 285.968664][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 285.974282][ T28] ret_from_fork+0x1f/0x30 [ 285.978698][ T28] [ 285.981830][ T28] Sending NMI from CPU 0 to CPUs 1: [ 285.987071][ C1] NMI backtrace for cpu 1 [ 285.987079][ C1] CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 6.3.0-rc2-syzkaller-00050-g9c1bec9c0b08 #0 [ 285.987091][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 285.987099][ C1] Workqueue: events_unbound toggle_allocation_gate [ 285.987119][ C1] RIP: 0010:write_comp_data+0x3c/0x90 [ 285.987140][ C1] Code: 01 00 00 49 89 f8 65 48 8b 14 25 80 b8 03 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 74 15 00 00 85 c0 74 4f 8b 82 50 15 00 00 <83> f8 03 75 44 48 8b 82 58 15 00 00 8b 92 54 15 00 00 48 8b 38 48 [ 285.987151][ C1] RSP: 0018:ffffc900000e7938 EFLAGS: 00000246 [ 285.987160][ C1] RAX: 0000000000000000 RBX: ffff8880b9844e60 RCX: ffffffff8177bab3 [ 285.987167][ C1] RDX: ffff8880167c0000 RSI: 0000000000000000 RDI: 0000000000000005 [ 285.987174][ C1] RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 [ 285.987180][ C1] R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10173089cd [ 285.987187][ C1] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001 [ 285.987196][ C1] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 285.987207][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 285.987215][ C1] CR2: 000055c7f9a81680 CR3: 000000000c571000 CR4: 0000000000350ee0 [ 285.987222][ C1] Call Trace: [ 285.987225][ C1] [ 285.987229][ C1] smp_call_function_many_cond+0x673/0x13c0 [ 285.987251][ C1] ? optimize_nops+0x3e0/0x3e0 [ 285.987267][ C1] ? smp_call_on_cpu+0x270/0x270 [ 285.987283][ C1] ? perf_event_bpf_event+0x4d0/0x4d0 [ 285.987301][ C1] ? text_poke_memset+0x60/0x60 [ 285.987314][ C1] ? optimize_nops+0x3e0/0x3e0 [ 285.987328][ C1] on_each_cpu_cond_mask+0x5a/0xa0 [ 285.987344][ C1] ? __kmem_cache_alloc_node+0xc4/0x320 [ 285.987361][ C1] text_poke_bp_batch+0x423/0x770 [ 285.987377][ C1] ? do_sync_core+0x30/0x30 [ 285.987391][ C1] ? arch_jump_label_transform_queue+0xa4/0x100 [ 285.987404][ C1] ? __jump_label_update+0x296/0x410 [ 285.987418][ C1] text_poke_finish+0x1a/0x30 [ 285.987432][ C1] arch_jump_label_transform_apply+0x17/0x30 [ 285.987444][ C1] jump_label_update+0x32f/0x410 [ 285.987458][ C1] static_key_enable_cpuslocked+0x1b5/0x270 [ 285.987471][ C1] static_key_enable+0x1a/0x20 [ 285.987484][ C1] toggle_allocation_gate+0xf8/0x230 [ 285.987497][ C1] ? wake_up_kfence_timer+0x30/0x30 [ 285.987510][ C1] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 285.987524][ C1] ? _raw_spin_unlock_irq+0x23/0x50 [ 285.987542][ C1] process_one_work+0x991/0x15c0 [ 285.987559][ C1] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 285.987578][ C1] ? spin_bug+0x1c0/0x1c0 [ 285.987591][ C1] ? _raw_spin_lock_irq+0x45/0x50 [ 285.987608][ C1] worker_thread+0x669/0x1090 [ 285.987624][ C1] ? process_one_work+0x15c0/0x15c0 [ 285.987638][ C1] kthread+0x2e8/0x3a0 [ 285.987654][ C1] ? kthread_complete_and_exit+0x40/0x40 [ 285.987667][ C1] ret_from_fork+0x1f/0x30 [ 285.987687][ C1] [ 285.988139][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 286.282726][ T28] CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc2-syzkaller-00050-g9c1bec9c0b08 #0 [ 286.292700][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 286.302850][ T28] Call Trace: [ 286.306126][ T28] [ 286.309048][ T28] dump_stack_lvl+0xd9/0x150 [ 286.313638][ T28] panic+0x688/0x730 [ 286.317533][ T28] ? panic_smp_self_stop+0x90/0x90 [ 286.322728][ T28] ? lapic_can_unplug_cpu+0xa0/0xa0 [ 286.327913][ T28] ? preempt_schedule_thunk+0x1a/0x20 [ 286.333289][ T28] ? watchdog+0xbe8/0x1090 [ 286.337697][ T28] watchdog+0xbf9/0x1090 [ 286.341931][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 286.347987][ T28] kthread+0x2e8/0x3a0 [ 286.352050][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 286.357682][ T28] ret_from_fork+0x1f/0x30 [ 286.362103][ T28] [ 286.365626][ T28] Kernel Offset: disabled [ 286.369957][ T28] Rebooting in 86400 seconds..