./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor56766304 <...> Warning: Permanently added '10.128.1.161' (ECDSA) to the list of known hosts. execve("./syz-executor56766304", ["./syz-executor56766304"], 0x7ffc35d6c2e0 /* 10 vars */) = 0 brk(NULL) = 0x5555573d4000 brk(0x5555573d4c40) = 0x5555573d4c40 arch_prctl(ARCH_SET_FS, 0x5555573d4300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor56766304", 4096) = 26 brk(0x5555573f5c40) = 0x5555573f5c40 brk(0x5555573f6000) = 0x5555573f6000 mprotect(0x7fe719196000, 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=0x5555573d45d0) = 5069 ./strace-static-x86_64: Process 5069 attached [pid 5069] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5069] setpgid(0, 0) = 0 [pid 5069] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "1000", 4) = 4 [pid 5069] close(3) = 0 [pid 5069] memfd_create("syzkaller", 0) = 3 [pid 5069] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe710cdb000 [pid 5069] 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 5069] munmap(0x7fe710cdb000, 1048576) = 0 [pid 5069] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5069] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5069] close(3) = 0 [pid 5069] mkdir("./file0", 0777) = 0 syzkaller login: [ 53.684236][ T5069] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5069 'syz-executor567' [ 53.710788][ T5069] loop0: detected capacity change from 0 to 2048 [ 53.723482][ T5069] EXT4-fs: Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 5069] mount("/dev/loop0", "./file0", "ext4", MS_SYNCHRONOUS, "data_err=abort,usrjquota=,dioread_nolock,abort,,errors=continue") = 0 [pid 5069] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5069] chdir("./file0") = 0 [pid 5069] ioctl(4, LOOP_CLR_FD) = 0 [pid 5069] close(4) = 0 [pid 5069] openat(AT_FDCWD, "cpuset.memory_pressure_enabled", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [pid 5069] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 11) = 11 [pid 5069] openat(AT_FDCWD, "cpuset.memory_pressure_enabled", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [ 53.746993][ T5069] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. [pid 5069] fallocate(5, FALLOC_FL_COLLAPSE_RANGE, 6, 19715 [pid 5068] kill(-5069, SIGKILL) = 0 [pid 5068] kill(5069, SIGKILL) = 0 [pid 5068] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5068] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 5068] getdents64(3, 0x5555573d5620 /* 2 entries */, 32768) = 48 [pid 5068] getdents64(3, 0x5555573d5620 /* 0 entries */, 32768) = 0 [pid 5068] close(3) = 0 [ 76.432538][ T7] cfg80211: failed to load regulatory.db [ 286.351087][ T28] INFO: task syz-executor567:5069 blocked for more than 143 seconds. [ 286.359245][ T28] Not tainted 6.3.0-rc3-syzkaller-00031-g1e760fa3596e #0 [ 286.366929][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.375644][ T28] task:syz-executor567 state:D stack:24608 pid:5069 ppid:5068 flags:0x00004004 [ 286.384928][ T28] Call Trace: [ 286.388216][ T28] [ 286.391205][ T28] __schedule+0x173b/0x4630 [ 286.395845][ T28] ? release_firmware_map_entry+0x190/0x190 [ 286.401778][ T28] ? lockdep_hardirqs_on+0x98/0x140 [ 286.407041][ T28] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 286.412978][ T28] ? _raw_spin_unlock+0x40/0x40 [ 286.417848][ T28] schedule+0xc3/0x180 [ 286.421953][ T28] io_schedule+0x8c/0x100 [ 286.426313][ T28] bit_wait_io+0x12/0xc0 [ 286.430563][ T28] __wait_on_bit_lock+0xbd/0x1a0 [ 286.435572][ T28] ? bit_wait+0xc0/0xc0 [ 286.439743][ T28] out_of_line_wait_on_bit_lock+0x1d4/0x250 [ 286.445678][ T28] ? bit_wait+0xc0/0xc0 [ 286.449849][ T28] ? __wait_on_bit_lock+0x1a0/0x1a0 [ 286.455101][ T28] ? bit_waitqueue+0x30/0x30 [ 286.459749][ T28] __sync_dirty_buffer+0x120/0x380 [ 286.464951][ T28] __ext4_handle_dirty_metadata+0x2a6/0x820 [ 286.471093][ T28] ? ext4_convert_inline_data_nolock+0xa3e/0xd80 [ 286.477455][ T28] ext4_convert_inline_data_nolock+0xaba/0xd80 [ 286.483675][ T28] ? read_lock_is_recursive+0x20/0x20 [ 286.489124][ T28] ? ext4_add_dirent_to_inline+0x4f0/0x4f0 [ 286.495284][ T28] ? ext4_journal_check_start+0x179/0x240 [ 286.501058][ T28] ? __ext4_journal_start_sb+0x26b/0x5a0 [ 286.506703][ T28] ext4_convert_inline_data+0x4da/0x620 [ 286.512301][ T28] ? memalloc_retry_wait+0xb0/0xb0 [ 286.517453][ T28] ext4_fallocate+0x14d/0x2050 [ 286.522282][ T28] ? rcu_read_lock_any_held+0xb7/0x160 [ 286.527845][ T28] ? ptrace_notify+0x278/0x380 [ 286.532692][ T28] ? memalloc_retry_wait+0xb0/0xb0 [ 286.537823][ T28] vfs_fallocate+0x54b/0x6b0 [ 286.542516][ T28] __x64_sys_fallocate+0xbd/0x100 [ 286.547548][ T28] do_syscall_64+0x41/0xc0 [ 286.552017][ T28] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 286.558025][ T28] RIP: 0033:0x7fe7191282f9 [ 286.562560][ T28] RSP: 002b:00007fff6827e9f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 286.571034][ T28] RAX: ffffffffffffffda RBX: 00007fe71916c860 RCX: 00007fe7191282f9 [ 286.579026][ T28] RDX: 0000000000000006 RSI: 0000000000000008 RDI: 0000000000000005 [ 286.587023][ T28] RBP: 0000000000000000 R08: 00007fe719196ec0 R09: 00007fe719196ec0 [ 286.595020][ T28] R10: 0000000000004d03 R11: 0000000000000246 R12: 00007fff6827ea20 [ 286.603039][ T28] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 [ 286.611080][ T28] [ 286.614120][ T28] [ 286.614120][ T28] Showing all locks held in the system: [ 286.621876][ T28] 1 lock held by rcu_tasks_kthre/12: [ 286.627180][ T28] #0: ffffffff8cf255f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 [ 286.637684][ T28] 1 lock held by rcu_tasks_trace/13: [ 286.642985][ T28] #0: ffffffff8cf25df0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 [ 286.653992][ T28] 1 lock held by khungtaskd/28: [ 286.658843][ T28] #0: ffffffff8cf25420 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 [ 286.668224][ T28] 2 locks held by getty/4750: [ 286.672922][ T28] #0: ffff8880289de098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.682766][ T28] #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 [ 286.692909][ T28] 3 locks held by syz-executor567/5069: [ 286.698463][ T28] #0: ffff8880223f4460 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x4be/0x6b0 [ 286.707718][ T28] #1: ffff8880772eb628 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: ext4_fallocate+0x145/0x2050 [ 286.718547][ T28] #2: ffff8880772eb2f0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x3b6/0x620 [ 286.728966][ T28] [ 286.731364][ T28] ============================================= [ 286.731364][ T28] [ 286.739775][ T28] NMI backtrace for cpu 1 [ 286.744089][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc3-syzkaller-00031-g1e760fa3596e #0 [ 286.753875][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 286.763914][ T28] Call Trace: [ 286.767177][ T28] [ 286.770093][ T28] dump_stack_lvl+0x1e7/0x2d0 [ 286.774764][ T28] ? nf_tcp_handle_invalid+0x650/0x650 [ 286.780213][ T28] ? panic+0x770/0x770 [ 286.784276][ T28] nmi_cpu_backtrace+0x498/0x4d0 [ 286.789198][ T28] ? vprintk_emit+0x10d/0x1f0 [ 286.793880][ T28] ? nmi_trigger_cpumask_backtrace+0x300/0x300 [ 286.800018][ T28] ? _printk+0xd5/0x120 [ 286.804175][ T28] ? panic+0x770/0x770 [ 286.808227][ T28] ? __wake_up_klogd+0xcc/0x100 [ 286.813062][ T28] ? panic+0x770/0x770 [ 286.817127][ T28] ? wq_watchdog_touch+0x72/0x110 [ 286.822199][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 286.828281][ T28] nmi_trigger_cpumask_backtrace+0x187/0x300 [ 286.834256][ T28] watchdog+0xec2/0xf00 [ 286.838450][ T28] kthread+0x270/0x300 [ 286.842533][ T28] ? hungtask_pm_notify+0x90/0x90 [ 286.847541][ T28] ? kthread_blkcg+0xd0/0xd0 [ 286.852133][ T28] ret_from_fork+0x1f/0x30 [ 286.856570][ T28] [ 286.859658][ T28] Sending NMI from CPU 1 to CPUs 0: [ 286.864934][ C0] NMI backtrace for cpu 0 [ 286.864945][ C0] CPU: 0 PID: 1119 Comm: kworker/u4:5 Not tainted 6.3.0-rc3-syzkaller-00031-g1e760fa3596e #0 [ 286.864960][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 286.864969][ C0] Workqueue: 0x0 (events_unbound) [ 286.864989][ C0] RIP: 0010:dequeue_entity+0x855/0x12f0 [ 286.865057][ C0] Code: ff 44 8b 6c 24 0c 41 83 e5 06 41 83 fd 02 0f 84 0a 01 00 00 48 8b 44 24 58 42 80 3c 30 00 74 0a 48 8b 7c 24 50 e8 eb cc 7c 00 <49> 8b 5c 24 50 49 8d 7c 24 48 48 89 f8 48 c1 e8 03 42 80 3c 30 00 [ 286.865068][ C0] RSP: 0018:ffffc90004fff9a8 EFLAGS: 00000046 [ 286.865079][ C0] RAX: 1ffff110173077f2 RBX: ffff888020d85bcc RCX: ffff888020d857c0 [ 286.865089][ C0] RDX: ffff888020d85868 RSI: 0000000000000000 RDI: ffff888020d85870 [ 286.865099][ C0] RBP: ffff888020d85870 R08: ffffffff813f1923 R09: fffffbfff1ca6eae [ 286.865108][ C0] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b983bf40 [ 286.865117][ C0] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 [ 286.865126][ C0] FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 286.865137][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.865147][ C0] CR2: 000055c5b7bf89b0 CR3: 000000000cd30000 CR4: 00000000003506f0 [ 286.865160][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.865167][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.865176][ C0] Call Trace: [ 286.865181][ C0] [ 286.865191][ C0] dequeue_task_fair+0x274/0x13e0 [ 286.865265][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 286.865286][ C0] ? enqueue_task_fair+0xba0/0xba0 [ 286.865311][ C0] __schedule+0x60b/0x4630 [ 286.865339][ C0] ? release_firmware_map_entry+0x190/0x190 [ 286.865357][ C0] ? lockdep_hardirqs_on_prepare+0x43c/0x7a0 [ 286.865372][ C0] ? print_irqtrace_events+0x220/0x220 [ 286.865383][ C0] ? kthread_data+0x52/0xc0 [ 286.865396][ C0] ? wq_worker_sleeping+0x63/0x270 [ 286.865411][ C0] schedule+0xc3/0x180 [ 286.865426][ C0] worker_thread+0xec1/0x1210 [ 286.865453][ C0] kthread+0x270/0x300 [ 286.865465][ C0] ? pr_cont_work+0x5e0/0x5e0 [ 286.865479][ C0] ? kthread_blkcg+0xd0/0xd0 [ 286.865493][ C0] ret_from_fork+0x1f/0x30 [ 286.865517][ C0] [ 286.865937][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 287.094765][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc3-syzkaller-00031-g1e760fa3596e #0 [ 287.104645][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 287.114690][ T28] Call Trace: [ 287.117969][ T28] [ 287.120899][ T28] dump_stack_lvl+0x1e7/0x2d0 [ 287.125581][ T28] ? nf_tcp_handle_invalid+0x650/0x650 [ 287.131036][ T28] ? panic+0x770/0x770 [ 287.135109][ T28] ? vscnprintf+0x5d/0x80 [ 287.139436][ T28] panic+0x31c/0x770 [ 287.143325][ T28] ? nmi_trigger_cpumask_backtrace+0x233/0x300 [ 287.149486][ T28] ? memcpy_page_flushcache+0x100/0x100 [ 287.155024][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10 [ 287.161087][ T28] ? nmi_trigger_cpumask_backtrace+0x233/0x300 [ 287.167229][ T28] ? nmi_trigger_cpumask_backtrace+0x2b4/0x300 [ 287.173379][ T28] ? nmi_trigger_cpumask_backtrace+0x2b9/0x300 [ 287.179529][ T28] watchdog+0xf00/0xf00 [ 287.183689][ T28] kthread+0x270/0x300 [ 287.187755][ T28] ? hungtask_pm_notify+0x90/0x90 [ 287.192768][ T28] ? kthread_blkcg+0xd0/0xd0 [ 287.197352][ T28] ret_from_fork+0x1f/0x30 [ 287.201774][ T28] [ 287.204977][ T28] Kernel Offset: disabled [ 287.209301][ T28] Rebooting in 86400 seconds..