./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2208837338 <...> Warning: Permanently added '10.128.1.220' (ED25519) to the list of known hosts. execve("./syz-executor2208837338", ["./syz-executor2208837338"], 0x7ffc01cc82c0 /* 10 vars */) = 0 brk(NULL) = 0x555576b70000 brk(0x555576b70d00) = 0x555576b70d00 arch_prctl(ARCH_SET_FS, 0x555576b70380) = 0 set_tid_address(0x555576b70650) = 5845 set_robust_list(0x555576b70660, 24) = 0 rseq(0x555576b70ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2208837338", 4096) = 28 getrandom("\xe7\x96\x2d\x44\xd0\x94\xa4\x17", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555576b70d00 brk(0x555576b91d00) = 0x555576b91d00 brk(0x555576b92000) = 0x555576b92000 mprotect(0x7f7eda9d6000, 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 5846 attached [pid 5846] set_robust_list(0x555576b70660, 24) = 0 [pid 5846] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5845] <... clone resumed>, child_tidptr=0x555576b70650) = 5846 [pid 5846] <... prctl resumed>) = 0 [pid 5846] setpgid(0, 0) = 0 [pid 5846] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5846] write(3, "1000", 4) = 4 [pid 5846] close(3) = 0 [pid 5846] write(1, "executing program\n", 18executing program ) = 18 [pid 5846] memfd_create("syzkaller", 0) = 3 [pid 5846] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7ed2516000 [pid 5846] 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"..., 16777216) = 16777216 [pid 5846] munmap(0x7f7ed2516000, 138412032) = 0 [pid 5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5846] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5846] close(3) = 0 [pid 5846] close(4) = 0 [pid 5846] mkdir("./file0", 0777) = 0 [ 247.276717][ T5846] loop0: detected capacity change from 0 to 32768 [pid 5846] mount("/dev/loop0", "./file0", "jfs", 0, "iocharset=maccroatian,discard=0x0000000000000003,nodiscard,errors=continue,iocharset=maccyrillic,") = 0 [pid 5846] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5846] chdir("./file0") = 0 [pid 5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5846] chdir("./file0") = 0 [ 247.334324][ T5846] [ 247.334324][ T5846] ... Log Wrap ... Log Wrap ... Log Wrap ... [ 247.334324][ T5846] [pid 5846] symlink("./file0", "./file0") = -1 EIO (Input/output error) [pid 5846] open("./file2", O_RDONLY|O_CREAT|O_NONBLOCK|O_DIRECT|FASYNC, 0440) = -1 EIO (Input/output error) [pid 5846] openat(AT_FDCWD, ".", O_RDONLY) = 4 [pid 5846] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_DIRECT|O_NOATIME|O_CLOEXEC, 0777) = -1 EIO (Input/output error) [ 247.385835][ T5846] read_mapping_page failed! [ 247.385974][ T5846] ERROR: (device loop0): txCommit: [ 247.385974][ T5846] [ 247.404411][ T5846] read_mapping_page failed! [ 247.404469][ T5846] ERROR: (device loop0): txCommit: [ 247.404469][ T5846] [pid 5846] mkdir("./file0", 073) = -1 EIO (Input/output error) [ 247.443957][ T5846] find_entry called with index = 0 [ 247.444041][ T5846] read_mapping_page failed! [ 247.444068][ T5846] ERROR: (device loop0): txCommit: [ 247.444068][ T5846] [ 247.452768][ T5846] read_mapping_page failed! [ 247.452783][ T5846] bread failed! [ 247.452809][ T5846] jfs_mkdir: dtInsert returned -EIO [ 247.452844][ T5846] ERROR: (device loop0): jfs_mkdir: [ 247.452844][ T5846] [ 247.455757][ T5846] read_mapping_page failed! [ 247.455823][ T5846] ERROR: (device loop0): txCommit: [ 247.455823][ T5846] [ 247.455910][ T5846] ERROR: (device loop0): jfs_readdir: JFS:Dtree error: ino = 32, bn=0, index = 1 [ 247.455910][ T5846] [ 247.455962][ T5846] ERROR: (device loop0): __get_metapage: using a discarded metapage [ 247.455962][ T5846] [pid 5846] getdents64(4, [pid 5845] kill(-5846, SIGKILL) = 0 [pid 5845] kill(5846, SIGKILL) = 0 [pid 5845] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5845] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5845] getdents64(3, 0x555576b716f0 /* 2 entries */, 32768) = 48 [pid 5845] getdents64(3, 0x555576b716f0 /* 0 entries */, 32768) = 0 [pid 5845] close(3) = 0 [ 430.237931][ T38] INFO: task syz-executor220:5846 blocked for more than 143 seconds. [ 430.237953][ T38] Tainted: G W 6.16.0-syzkaller-04405-g4b290aae788e #0 [ 430.237961][ T38] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 430.237966][ T38] task:syz-executor220 state:D stack:24584 pid:5846 tgid:5846 ppid:5845 task_flags:0x400140 flags:0x00004006 [ 430.238003][ T38] Call Trace: [ 430.238008][ T38] [ 430.238017][ T38] __schedule+0x16b2/0x4ca0 [ 430.238053][ T38] ? schedule+0x165/0x360 [ 430.238069][ T38] ? __pfx___schedule+0x10/0x10 [ 430.238103][ T38] ? schedule+0x91/0x360 [ 430.238119][ T38] schedule+0x165/0x360 [ 430.238134][ T38] io_schedule+0x81/0xe0 [ 430.238149][ T38] folio_wait_bit_common+0x6b5/0xb90 [ 430.238182][ T38] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 430.238201][ T38] ? __pfx_wake_page_function+0x10/0x10 [ 430.238223][ T38] ? jfs_error+0x1ef/0x2c0 [ 430.238239][ T38] ? __pfx_jfs_error+0x10/0x10 [ 430.238254][ T38] release_metapage+0x103/0xab0 [ 430.238273][ T38] ? do_read_cache_folio+0x45d/0x560 [ 430.238289][ T38] ? __pfx_metapage_read_folio+0x10/0x10 [ 430.238314][ T38] __get_metapage+0x9a0/0xde0 [ 430.238342][ T38] jfs_readdir+0x1e01/0x3ae0 [ 430.238392][ T38] ? __pfx_jfs_readdir+0x10/0x10 [ 430.238423][ T38] ? rwbase_write_lock+0x56f/0x750 [ 430.238444][ T38] ? __pfx_jfs_readdir+0x10/0x10 [ 430.238458][ T38] wrap_directory_iterator+0x96/0xe0 [ 430.238476][ T38] iterate_dir+0x5bb/0x780 [ 430.238494][ T38] __se_sys_getdents64+0xe4/0x260 [ 430.238512][ T38] ? __pfx___se_sys_getdents64+0x10/0x10 [ 430.238526][ T38] ? __pfx_filldir64+0x10/0x10 [ 430.238552][ T38] ? rcu_is_watching+0x15/0xb0 [ 430.238573][ T38] do_syscall_64+0xfa/0x3b0 [ 430.238588][ T38] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.238602][ T38] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.238614][ T38] ? clear_bhb_loop+0x60/0xb0 [ 430.238630][ T38] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.238642][ T38] RIP: 0033:0x7f7eda95cc19 [ 430.238653][ T38] RSP: 002b:00007ffd76156b48 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 [ 430.238667][ T38] RAX: ffffffffffffffda RBX: 0000200000000000 RCX: 00007f7eda95cc19 [ 430.238676][ T38] RDX: 0000000000001000 RSI: 0000200000000f80 RDI: 0000000000000004 [ 430.238685][ T38] RBP: 0030656c69662f2e R08: 0000555576b714c0 R09: 0000555576b714c0 [ 430.238693][ T38] R10: 0000555576b714c0 R11: 0000000000000246 R12: 00002000000000c0 [ 430.238702][ T38] R13: 00007ffd76156d98 R14: 431bde82d7b634db R15: 00007f7eda9a503b [ 430.238725][ T38] [ 430.238730][ T38] [ 430.238730][ T38] Showing all locks held in the system: [ 430.238739][ T38] 1 lock held by khungtaskd/38: [ 430.238749][ T38] #0: ffffffff8d7aa040 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.238798][ T38] 2 locks held by kworker/u8:11/1284: [ 430.238805][ T38] #0: ffff888019881138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 [ 430.238836][ T38] #1: ffffc9000517fbc0 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 [ 430.238879][ T38] 2 locks held by getty/5572: [ 430.238885][ T38] #0: ffff88823bf7e8a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.238914][ T38] #1: ffffc90003e9b2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x444/0x1410 [ 430.238947][ T38] 2 locks held by syz-executor220/5846: [ 430.238954][ T38] #0: ffff888031876728 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x253/0x320 [ 430.238987][ T38] #1: ffff888037f40f88 (&type->i_mutex_dir_key#6){++++}-{4:4}, at: wrap_directory_iterator+0x5d/0xe0 [ 430.239021][ T38] [ 430.239023][ T38] ============================================= [ 430.239023][ T38] [ 430.239029][ T38] NMI backtrace for cpu 0 [ 430.239040][ T38] CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Tainted: G W 6.16.0-syzkaller-04405-g4b290aae788e #0 PREEMPT_{RT,(full)} [ 430.239058][ T38] Tainted: [W]=WARN [ 430.239062][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.239069][ T38] Call Trace: [ 430.239075][ T38] [ 430.239079][ T38] dump_stack_lvl+0x189/0x250 [ 430.239101][ T38] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.239118][ T38] ? __pfx__printk+0x10/0x10 [ 430.239137][ T38] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.239151][ T38] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.239164][ T38] ? __pfx__printk+0x10/0x10 [ 430.239178][ T38] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.239194][ T38] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.239207][ T38] watchdog+0xf93/0xfe0 [ 430.239228][ T38] ? watchdog+0x1de/0xfe0 [ 430.239248][ T38] kthread+0x711/0x8a0 [ 430.239267][ T38] ? __pfx_watchdog+0x10/0x10 [ 430.239286][ T38] ? __pfx_kthread+0x10/0x10 [ 430.239307][ T38] ? __pfx_kthread+0x10/0x10 [ 430.239325][ T38] ret_from_fork+0x3fc/0x770 [ 430.239343][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 430.239364][ T38] ? __switch_to_asm+0x39/0x70 [ 430.239375][ T38] ? __switch_to_asm+0x33/0x70 [ 430.239385][ T38] ? __pfx_kthread+0x10/0x10 [ 430.239403][ T38] ret_from_fork_asm+0x1a/0x30 [ 430.239422][ T38] [ 430.239426][ T38] Sending NMI from CPU 0 to CPUs 1: [ 430.239470][ C1] NMI backtrace for cpu 1 [ 430.239489][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W 6.16.0-syzkaller-04405-g4b290aae788e #0 PREEMPT_{RT,(full)} [ 430.239513][ C1] Tainted: [W]=WARN [ 430.239518][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.239527][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 430.239548][ C1] Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 53 1b 1a 00 f3 0f 1e fa fb f4 c8 b2 03 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 430.239562][ C1] RSP: 0018:ffffc900001d7de0 EFLAGS: 000002c2 [ 430.239577][ C1] RAX: 795132a39e33c100 RBX: ffffffff819592e8 RCX: 795132a39e33c100 [ 430.239589][ C1] RDX: 0000000000000001 RSI: ffffffff8cff8d9d RDI: ffffffff8b61dd80 [ 430.239612][ C1] RBP: ffffc900001d7f20 R08: ffff8880b893339b R09: 1ffff11017126673 [ 430.239623][ C1] R10: dffffc0000000000 R11: ffffed1017126674 R12: ffffffff8efa15f0 [ 430.239635][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003855b28 [ 430.239647][ C1] FS: 0000000000000000(0000) GS:ffff888126c22000(0000) knlGS:0000000000000000 [ 430.239660][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.239672][ C1] CR2: 000055598a640168 CR3: 000000000d5a6000 CR4: 00000000003526f0 [ 430.239688][ C1] Call Trace: [ 430.239695][ C1] [ 430.239701][ C1] default_idle+0x13/0x20 [ 430.239722][ C1] default_idle_call+0x74/0xb0 [ 430.239743][ C1] do_idle+0x1e8/0x510 [ 430.239764][ C1] ? __pfx_do_idle+0x10/0x10 [ 430.239779][ C1] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 430.239799][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.239817][ C1] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 430.239836][ C1] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 430.239859][ C1] cpu_startup_entry+0x44/0x60 [ 430.239877][ C1] start_secondary+0x101/0x110 [ 430.239895][ C1] common_startup_64+0x13e/0x147 [ 430.239918][ C1] [ 430.240448][ T38] Kernel panic - not syncing: hung_task: blocked tasks [ 430.240464][ T38] CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Tainted: G W 6.16.0-syzkaller-04405-g4b290aae788e #0 PREEMPT_{RT,(full)} [ 430.240490][ T38] Tainted: [W]=WARN [ 430.240495][ T38] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.240505][ T38] Call Trace: [ 430.240512][ T38] [ 430.240519][ T38] dump_stack_lvl+0x99/0x250 [ 430.240553][ T38] ? __asan_memcpy+0x40/0x70 [ 430.240574][ T38] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.240597][ T38] ? __pfx__printk+0x10/0x10 [ 430.240625][ T38] panic+0x2db/0x790 [ 430.240655][ T38] ? __pfx_panic+0x10/0x10 [ 430.240678][ T38] ? __pfx___x2apic_send_IPI_mask+0x10/0x10 [ 430.240703][ T38] ? irq_work_queue+0xc3/0x140 [ 430.240737][ T38] watchdog+0xfd2/0xfe0 [ 430.240767][ T38] ? watchdog+0x1de/0xfe0 [ 430.240798][ T38] kthread+0x711/0x8a0 [ 430.240827][ T38] ? __pfx_watchdog+0x10/0x10 [ 430.240852][ T38] ? __pfx_kthread+0x10/0x10 [ 430.240883][ T38] ? __pfx_kthread+0x10/0x10 [ 430.240911][ T38] ret_from_fork+0x3fc/0x770 [ 430.240937][ T38] ? __pfx_ret_from_fork+0x10/0x10 [ 430.240966][ T38] ? __switch_to_asm+0x39/0x70 [ 430.240982][ T38] ? __switch_to_asm+0x33/0x70 [ 430.240996][ T38] ? __pfx_kthread+0x10/0x10 [ 430.241023][ T38] ret_from_fork_asm+0x1a/0x30 [ 430.241053][ T38] [ 430.241269][ T38] Kernel Offset: disabled