./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3019999502 <...> Warning: Permanently added '10.128.0.65' (ED25519) to the list of known hosts. execve("./syz-executor3019999502", ["./syz-executor3019999502"], 0x7ffd61674170 /* 10 vars */) = 0 brk(NULL) = 0x55555d889000 brk(0x55555d889d00) = 0x55555d889d00 arch_prctl(ARCH_SET_FS, 0x55555d889380) = 0 set_tid_address(0x55555d889650) = 5837 set_robust_list(0x55555d889660, 24) = 0 rseq(0x55555d889ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3019999502", 4096) = 28 getrandom("\x89\x6a\x9c\xfe\xc7\xcc\x56\xe2", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555d889d00 brk(0x55555d8aad00) = 0x55555d8aad00 brk(0x55555d8ab000) = 0x55555d8ab000 mprotect(0x7fb124ae3000, 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 mkdir("./syzkaller.VtL4TH", 0700) = 0 chmod("./syzkaller.VtL4TH", 0777) = 0 chdir("./syzkaller.VtL4TH") = 0 mkdir("./0", 0777) = 0 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 5838 attached [pid 5838] set_robust_list(0x55555d889660, 24) = 0 [pid 5838] chdir("./0" [pid 5837] <... clone resumed>, child_tidptr=0x55555d889650) = 5838 [pid 5838] <... chdir resumed>) = 0 [pid 5838] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5838] setpgid(0, 0) = 0 [pid 5838] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5838] write(3, "1000", 4) = 4 [pid 5838] close(3) = 0 [pid 5838] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5838] write(1, "executing program\n", 18executing program ) = 18 [pid 5838] memfd_create("syzkaller", 0) = 3 [pid 5838] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb11c600000 [pid 5838] write(3, "\x68\x73\x71\x73\x07\x00\x00\x00\xfd\xf1\x7c\x63\x00\x00\x10\x00\x00\x00\x00\x00\x04\x00\x14\x00\xd1\xe1\x01\x00\x04\x00\x00\x00\x1f\x01\x00\x00\x00\x00\x00\x00\x64\x03\x00\x00\x00\x00\x00\x00\x08\x03\x00\x00\x00\x00\x00\x00\x4c\x03\x00\x00\x00\x00\x00\x00\x06\x01\x00\x00\x00\x00\x00\x00\x47\x02\x00\x00\x00\x00\x00\x00\xc0\x02\x00\x00\x00\x00\x00\x00\xfa\x02\x00\x00\x00\x00\x00\x00\xfd\x37\x7a\x58"..., 4096) = 4096 [pid 5838] munmap(0x7fb11c600000, 138412032) = 0 [pid 5838] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5838] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5838] close(3) = 0 [pid 5838] close(4) = 0 [pid 5838] mkdir("./file0", 0777) = 0 [ 94.798419][ T5838] loop0: detected capacity change from 0 to 8 [pid 5838] mount("/dev/loop0", "./file0", "squashfs", MS_SYNCHRONOUS, "") = 0 [pid 5838] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5838] chdir("./file0") = 0 [pid 5838] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 97.606864][ T9] cfg80211: failed to load regulatory.db [pid 5838] open("./file2", O_RDONLY [pid 5837] kill(-5838, SIGKILL) = 0 [pid 5838] <... open resumed>) = ? [pid 5837] kill(5838, SIGKILL) = 0 [pid 5838] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5838, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=7 /* 0.07 s */} --- restart_syscall(<... resuming interrupted kill ...>) = 0 umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x55555d88a6f0 /* 4 entries */, 32768) = 112 [ 99.695400][ T30] audit: type=1800 audit(1748723217.766:2): pid=5838 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz-executor301" name="file2" dev="loop0" ino=6 res=0 errno=0 [ 99.717764][ T5838] syz-executor301 (5838) used greatest stack depth: 19976 bytes left [ 287.046232][ T31] INFO: task syz-executor301:5837 blocked for more than 143 seconds. [ 287.054593][ T31] Not tainted 6.15.0-next-20250530-syzkaller #0 [ 287.061456][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 287.070246][ T31] task:syz-executor301 state:D stack:25160 pid:5837 tgid:5837 ppid:5834 task_flags:0x400100 flags:0x00004002 [ 287.082309][ T31] Call Trace: [ 287.085838][ T31] [ 287.088924][ T31] __schedule+0x16f5/0x4d00 [ 287.093521][ T31] ? schedule+0x165/0x360 [ 287.097946][ T31] ? __pfx___schedule+0x10/0x10 [ 287.102858][ T31] ? schedule+0x91/0x360 [ 287.107196][ T31] schedule+0x165/0x360 [ 287.111493][ T31] io_schedule+0x80/0xd0 [ 287.116003][ T31] folio_wait_bit_common+0x6b0/0xb90 [ 287.121462][ T31] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 287.127468][ T31] ? __pfx_wake_page_function+0x10/0x10 [ 287.133057][ T31] ? folios_put_refs+0x559/0x640 [ 287.138088][ T31] ? __pfx_find_lock_entries+0x10/0x10 [ 287.143634][ T31] __filemap_get_folio+0x139/0xaf0 [ 287.148851][ T31] truncate_inode_pages_range+0x3ed/0xda0 [ 287.154802][ T31] ? evict+0x847/0x9c0 [ 287.159064][ T31] ? evict_inodes+0x636/0x6c0 [ 287.164210][ T31] ? generic_shutdown_super+0x9a/0x2c0 [ 287.170474][ T31] ? kill_block_super+0x44/0x90 [ 287.176148][ T31] ? deactivate_locked_super+0xb9/0x130 [ 287.181784][ T31] ? __pfx_truncate_inode_pages_range+0x10/0x10 [ 287.188126][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.194265][ T31] ? __lock_acquire+0xab9/0xd20 [ 287.199409][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.204853][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.210226][ T31] evict+0x517/0x9c0 [ 287.214270][ T31] ? __pfx_evict+0x10/0x10 [ 287.218834][ T31] ? do_raw_spin_unlock+0x122/0x240 [ 287.224468][ T31] evict_inodes+0x636/0x6c0 [ 287.229152][ T31] ? __pfx_evict_inodes+0x10/0x10 [ 287.234242][ T31] generic_shutdown_super+0x9a/0x2c0 [ 287.239744][ T31] kill_block_super+0x44/0x90 [ 287.244530][ T31] deactivate_locked_super+0xb9/0x130 [ 287.250491][ T31] cleanup_mnt+0x425/0x4c0 [ 287.255004][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.260343][ T31] task_work_run+0x1d1/0x260 [ 287.265065][ T31] ? __pfx_task_work_run+0x10/0x10 [ 287.270356][ T31] ? __x64_sys_umount+0x122/0x160 [ 287.275485][ T31] ptrace_notify+0x281/0x2c0 [ 287.280225][ T31] ? __pfx_ptrace_notify+0x10/0x10 [ 287.285477][ T31] ? __x64_sys_umount+0x122/0x160 [ 287.290548][ T31] ? __pfx___x64_sys_umount+0x10/0x10 [ 287.295998][ T31] ? rcu_is_watching+0x15/0xb0 [ 287.300805][ T31] syscall_exit_work+0xc6/0x1d0 [ 287.306050][ T31] do_syscall_64+0x2ad/0x3b0 [ 287.310698][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.316097][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.322255][ T31] ? clear_bhb_loop+0x60/0xb0 [ 287.327248][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.333215][ T31] RIP: 0033:0x7fb124a6f447 [ 287.337774][ T31] RSP: 002b:00007ffd800d4b48 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 [ 287.346530][ T31] RAX: 0000000000000000 RBX: 0000000000000063 RCX: 00007fb124a6f447 [ 287.354715][ T31] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd800d4c00 [ 287.362746][ T31] RBP: 00007ffd800d4c00 R08: 0000000000000000 R09: 0000000000000000 [ 287.370913][ T31] R10: 00000000ffffffff R11: 0000000000000206 R12: 00007ffd800d5c70 [ 287.379074][ T31] R13: 000055555d88a6c0 R14: 0000000000000001 R15: 431bde82d7b634db [ 287.387164][ T31] [ 287.390224][ T31] [ 287.390224][ T31] Showing all locks held in the system: [ 287.398046][ T31] 1 lock held by khungtaskd/31: [ 287.402925][ T31] #0: ffffffff8e13f140 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 287.413441][ T31] 2 locks held by getty/5599: [ 287.418182][ T31] #0: ffff8880309830a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.428311][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 287.438665][ T31] 1 lock held by syz-executor301/5837: [ 287.444136][ T31] #0: ffff8880341e20e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 [ 287.454546][ T31] [ 287.456902][ T31] ============================================= [ 287.456902][ T31] [ 287.465513][ T31] NMI backtrace for cpu 1 [ 287.465540][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full) [ 287.465561][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.465574][ T31] Call Trace: [ 287.465582][ T31] [ 287.465591][ T31] dump_stack_lvl+0x189/0x250 [ 287.465616][ T31] ? __wake_up_klogd+0xd9/0x110 [ 287.465644][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.465662][ T31] ? __pfx__printk+0x10/0x10 [ 287.465697][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.465726][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.465747][ T31] ? _printk+0xcf/0x120 [ 287.465775][ T31] ? __pfx__printk+0x10/0x10 [ 287.465799][ T31] ? debug_show_all_locks+0x2e/0x180 [ 287.465819][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.465852][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.465882][ T31] watchdog+0xfee/0x1030 [ 287.465915][ T31] ? watchdog+0x1de/0x1030 [ 287.465953][ T31] kthread+0x70e/0x8a0 [ 287.465983][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.466011][ T31] ? __pfx_kthread+0x10/0x10 [ 287.466039][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.466069][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.466098][ T31] ? __pfx_kthread+0x10/0x10 [ 287.466124][ T31] ret_from_fork+0x3fc/0x770 [ 287.466160][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.466198][ T31] ? __switch_to_asm+0x39/0x70 [ 287.466219][ T31] ? __switch_to_asm+0x33/0x70 [ 287.466240][ T31] ? __pfx_kthread+0x10/0x10 [ 287.466266][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.466306][ T31] [ 287.466328][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.631863][ C0] NMI backtrace for cpu 0 [ 287.631884][ C0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full) [ 287.631904][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.631915][ C0] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 287.631950][ C0] Code: c3 d4 02 00 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 43 45 22 00 f3 0f 1e fa fb f4 98 d4 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 287.631965][ C0] RSP: 0018:ffffffff8de07d80 EFLAGS: 000002c6 [ 287.631982][ C0] RAX: 5ac85992fe914100 RBX: ffffffff81976058 RCX: 5ac85992fe914100 [ 287.631996][ C0] RDX: 0000000000000001 RSI: ffffffff8d98278e RDI: ffffffff8be29c80 [ 287.632008][ C0] RBP: ffffffff8de07ea8 R08: ffff8880b8632f5b R09: 1ffff110170c65eb [ 287.632020][ C0] R10: dffffc0000000000 R11: ffffed10170c65ec R12: ffffffff8fa127f0 [ 287.632033][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1bd2a50 [ 287.632044][ C0] FS: 0000000000000000(0000) GS:ffff888125c53000(0000) knlGS:0000000000000000 [ 287.632065][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.632077][ C0] CR2: 0000559af4d77660 CR3: 000000000df38000 CR4: 00000000003526f0 [ 287.632092][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.632101][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.632112][ C0] Call Trace: [ 287.632122][ C0] [ 287.632129][ C0] default_idle+0x13/0x20 [ 287.632148][ C0] default_idle_call+0x74/0xb0 [ 287.632168][ C0] do_idle+0x1e8/0x510 [ 287.632190][ C0] ? __pfx_do_idle+0x10/0x10 [ 287.632216][ C0] cpu_startup_entry+0x44/0x60 [ 287.632232][ C0] rest_init+0x2de/0x300 [ 287.632250][ C0] ? __pfx_x86_late_time_init+0x10/0x10 [ 287.632287][ C0] start_kernel+0x47d/0x500 [ 287.632309][ C0] x86_64_start_reservations+0x24/0x30 [ 287.632332][ C0] x86_64_start_kernel+0x143/0x1c0 [ 287.632355][ C0] common_startup_64+0x13e/0x147 [ 287.632384][ C0] [ 287.632918][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.839101][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full) [ 287.850243][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.860362][ T31] Call Trace: [ 287.863663][ T31] [ 287.866653][ T31] dump_stack_lvl+0x99/0x250 [ 287.871358][ T31] ? __asan_memcpy+0x40/0x70 [ 287.876034][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.881541][ T31] ? __pfx__printk+0x10/0x10 [ 287.886312][ T31] panic+0x2db/0x790 [ 287.890245][ T31] ? __pfx_panic+0x10/0x10 [ 287.894691][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.900550][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.906036][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.912398][ T31] watchdog+0x102d/0x1030 [ 287.916874][ T31] ? watchdog+0x1de/0x1030 [ 287.921323][ T31] kthread+0x70e/0x8a0 [ 287.925626][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.930552][ T31] ? __pfx_kthread+0x10/0x10 [ 287.935192][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.940570][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.945892][ T31] ? __pfx_kthread+0x10/0x10 [ 287.950586][ T31] ret_from_fork+0x3fc/0x770 [ 287.955197][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.960372][ T31] ? __switch_to_asm+0x39/0x70 [ 287.965265][ T31] ? __switch_to_asm+0x33/0x70 [ 287.970241][ T31] ? __pfx_kthread+0x10/0x10 [ 287.974956][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.979756][ T31] [ 287.983152][ T31] Kernel Offset: disabled [ 287.987597][ T31] Rebooting in 86400 seconds..