./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3487969403 <...> Warning: Permanently added '10.128.0.12' (ED25519) to the list of known hosts. execve("./syz-executor3487969403", ["./syz-executor3487969403"], 0x7fff73c316d0 /* 10 vars */) = 0 brk(NULL) = 0x55556ea5c000 brk(0x55556ea5cd00) = 0x55556ea5cd00 arch_prctl(ARCH_SET_FS, 0x55556ea5c380) = 0 set_tid_address(0x55556ea5c650) = 5851 set_robust_list(0x55556ea5c660, 24) = 0 rseq(0x55556ea5cca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3487969403", 4096) = 28 getrandom("\xab\x20\x82\x13\xe9\x85\x6e\x6c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556ea5cd00 brk(0x55556ea7dd00) = 0x55556ea7dd00 brk(0x55556ea7e000) = 0x55556ea7e000 mprotect(0x7f78493f5000, 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.fWdKkp", 0700) = 0 chmod("./syzkaller.fWdKkp", 0777) = 0 chdir("./syzkaller.fWdKkp") = 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 5852 attached , child_tidptr=0x55556ea5c650) = 5852 [pid 5852] set_robust_list(0x55556ea5c660, 24) = 0 [pid 5852] chdir("./0") = 0 [pid 5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5852] setpgid(0, 0) = 0 [pid 5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5852] write(3, "1000", 4) = 4 [pid 5852] close(3) = 0 [pid 5852] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 5852] write(1, "executing program\n", 18) = 18 [pid 5852] memfd_create("syzkaller", 0) = 3 [pid 5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7840e00000 [pid 5852] 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 5852] munmap(0x7f7840e00000, 138412032) = 0 [pid 5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5852] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5852] close(3) = 0 [pid 5852] close(4) = 0 [pid 5852] mkdir("./file0", 0777) = 0 [ 156.685724][ T5852] loop0: detected capacity change from 0 to 8 [pid 5852] mount("/dev/loop0", "./file0", "squashfs", MS_SYNCHRONOUS, "") = 0 [pid 5852] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5852] chdir("./file0") = 0 [pid 5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5852] open("./file2", O_RDONLY [pid 5851] kill(-5852, SIGKILL) = 0 [pid 5851] kill(5852, SIGKILL [pid 5852] <... open resumed>) = ? [pid 5851] <... kill resumed>) = 0 [pid 5852] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5852, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=5 /* 0.05 s */} --- 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 [ 161.594753][ T30] audit: type=1800 audit(1748051925.876:2): pid=5852 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz-executor348" name="file2" dev="loop0" ino=6 res=0 errno=0 getdents64(3, 0x55556ea5d6f0 /* 4 entries */, 32768) = 112 [ 429.276571][ T31] INFO: task syz-executor348:5851 blocked for more than 143 seconds. [ 429.284687][ T31] Not tainted 6.15.0-rc7-syzkaller-00112-geccf6f2f6ab9 #0 [ 429.292480][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.301247][ T31] task:syz-executor348 state:D stack:25272 pid:5851 tgid:5851 ppid:5848 task_flags:0x400100 flags:0x00004002 [ 429.313346][ T31] Call Trace: [ 429.316832][ T31] [ 429.319773][ T31] __schedule+0x16e2/0x4cd0 [ 429.324316][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.330040][ T31] ? schedule+0x165/0x360 [ 429.334415][ T31] ? __lock_acquire+0xaac/0xd20 [ 429.339589][ T31] ? __pfx___schedule+0x10/0x10 [ 429.344618][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.350390][ T31] ? schedule+0x91/0x360 [ 429.354841][ T31] schedule+0x165/0x360 [ 429.359102][ T31] io_schedule+0x81/0xe0 [ 429.363396][ T31] folio_wait_bit_common+0x6b0/0xb90 [ 429.368793][ T31] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 429.374648][ T31] ? __pfx_wake_page_function+0x10/0x10 [ 429.380315][ T31] ? folios_put_refs+0x560/0x640 [ 429.385273][ T31] ? __pfx_find_lock_entries+0x10/0x10 [ 429.390884][ T31] __filemap_get_folio+0x139/0xaf0 [ 429.396062][ T31] truncate_inode_pages_range+0x3ed/0xda0 [ 429.401956][ T31] ? evict+0x847/0x9c0 [ 429.406054][ T31] ? evict_inodes+0x636/0x6c0 [ 429.410794][ T31] ? generic_shutdown_super+0x9a/0x2c0 [ 429.416330][ T31] ? kill_block_super+0x44/0x90 [ 429.421189][ T31] ? deactivate_locked_super+0xbc/0x130 [ 429.426889][ T31] ? __pfx_truncate_inode_pages_range+0x10/0x10 [ 429.433178][ T31] ? syscall_exit_to_user_mode+0x12/0x120 [ 429.439030][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.444692][ T31] ? __lock_acquire+0xaac/0xd20 [ 429.449673][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 429.455005][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 429.460450][ T31] evict+0x517/0x9c0 [ 429.464381][ T31] ? __pfx_evict+0x10/0x10 [ 429.468868][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.474525][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.480245][ T31] ? do_raw_spin_unlock+0x122/0x240 [ 429.485523][ T31] evict_inodes+0x636/0x6c0 [ 429.490126][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.495786][ T31] ? __pfx_evict_inodes+0x10/0x10 [ 429.500905][ T31] generic_shutdown_super+0x9a/0x2c0 [ 429.506262][ T31] kill_block_super+0x44/0x90 [ 429.510953][ T31] deactivate_locked_super+0xbc/0x130 [ 429.516406][ T31] cleanup_mnt+0x425/0x4c0 [ 429.520882][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.526646][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 429.531886][ T31] task_work_run+0x1d4/0x260 [ 429.536666][ T31] ? __pfx_task_work_run+0x10/0x10 [ 429.541824][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.547546][ T31] ? path_umount+0x249/0xf70 [ 429.552173][ T31] ptrace_notify+0x281/0x2c0 [ 429.556899][ T31] ? __pfx_ptrace_notify+0x10/0x10 [ 429.562059][ T31] ? __pfx_path_umount+0x10/0x10 [ 429.567073][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.572732][ T31] syscall_exit_work+0xc2/0x1d0 [ 429.577684][ T31] syscall_exit_to_user_mode_prepare+0x6f/0xe0 [ 429.583882][ T31] syscall_exit_to_user_mode+0x12/0x120 [ 429.589524][ T31] do_syscall_64+0x103/0x210 [ 429.594218][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.599983][ T31] ? exc_page_fault+0x91/0x110 [ 429.604847][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.610827][ T31] RIP: 0033:0x7f7849381447 [ 429.615254][ T31] RSP: 002b:00007fff1f9f5a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 [ 429.623777][ T31] RAX: 0000000000000000 RBX: 0000000000000063 RCX: 00007f7849381447 [ 429.631825][ T31] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff1f9f5b40 [ 429.640016][ T31] RBP: 00007fff1f9f5b40 R08: 0000000000000000 R09: 0000000000000000 [ 429.648249][ T31] R10: 00000000ffffffff R11: 0000000000000206 R12: 00007fff1f9f6bb0 [ 429.656328][ T31] R13: 000055556ea5d6c0 R14: 0000000000000001 R15: 431bde82d7b634db [ 429.664452][ T31] [ 429.667590][ T31] [ 429.667590][ T31] Showing all locks held in the system: [ 429.675318][ T31] 1 lock held by khungtaskd/31: [ 429.680252][ T31] #0: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 429.690286][ T31] 2 locks held by getty/5590: [ 429.695101][ T31] #0: ffff88814d56e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 429.705001][ T31] #1: ffffc90002ffe2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 429.715306][ T31] 1 lock held by syz-executor348/5851: [ 429.720872][ T31] #0: ffff888028dc80e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 [ 429.731203][ T31] [ 429.733539][ T31] ============================================= [ 429.733539][ T31] [ 429.742468][ T31] NMI backtrace for cpu 0 [ 429.742486][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc7-syzkaller-00112-geccf6f2f6ab9 #0 PREEMPT(full) [ 429.742512][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 429.742525][ T31] Call Trace: [ 429.742533][ T31] [ 429.742543][ T31] dump_stack_lvl+0x189/0x250 [ 429.742583][ T31] ? __wake_up_klogd+0xd9/0x110 [ 429.742612][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.742647][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 429.742699][ T31] ? __pfx__printk+0x10/0x10 [ 429.742743][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 429.742778][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 429.742803][ T31] ? _printk+0xcf/0x120 [ 429.742859][ T31] ? __pfx__printk+0x10/0x10 [ 429.742889][ T31] ? debug_show_all_locks+0x2e/0x180 [ 429.742932][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 429.742966][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 429.743001][ T31] watchdog+0xfee/0x1030 [ 429.743042][ T31] ? watchdog+0x1de/0x1030 [ 429.743082][ T31] kthread+0x711/0x8a0 [ 429.743121][ T31] ? __pfx_watchdog+0x10/0x10 [ 429.743156][ T31] ? __pfx_kthread+0x10/0x10 [ 429.743190][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.743225][ T31] ? __pfx_kthread+0x10/0x10 [ 429.743257][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 429.743289][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.743321][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 429.743358][ T31] ? __pfx_kthread+0x10/0x10 [ 429.743391][ T31] ret_from_fork+0x4e/0x80 [ 429.743421][ T31] ? __pfx_kthread+0x10/0x10 [ 429.743457][ T31] ret_from_fork_asm+0x1a/0x30 [ 429.743506][ T31] [ 429.743516][ T31] Sending NMI from CPU 0 to CPUs 1: [ 429.916132][ C1] NMI backtrace for cpu 1 [ 429.916155][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.15.0-rc7-syzkaller-00112-geccf6f2f6ab9 #0 PREEMPT(full) [ 429.916179][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 429.916191][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 429.916224][ C1] Code: ee ad b9 f5 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d a3 7f 11 00 f3 0f 1e fa fb f4 c3 ad b9 f5 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 429.916245][ C1] RSP: 0018:ffffc90000197de0 EFLAGS: 00000286 [ 429.916265][ C1] RAX: 61c2c0d1e9baec00 RBX: ffffffff81977108 RCX: 61c2c0d1e9baec00 [ 429.916282][ C1] RDX: 0000000000000001 RSI: ffffffff8d74e2cc RDI: ffffffff8bc1f640 [ 429.916297][ C1] RBP: ffffc90000197f20 R08: ffff8880b8932b5b R09: 1ffff1101712656b [ 429.916313][ C1] R10: dffffc0000000000 R11: ffffed101712656c R12: ffffffff8f7f3570 [ 429.916329][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110038deb40 [ 429.916346][ C1] FS: 0000000000000000(0000) GS:ffff8881261c2000(0000) knlGS:0000000000000000 [ 429.916363][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 429.916378][ C1] CR2: 000055f00e378660 CR3: 000000000dd38000 CR4: 0000000000350ef0 [ 429.916394][ C1] Call Trace: [ 429.916402][ C1] [ 429.916410][ C1] default_idle+0x13/0x20 [ 429.916441][ C1] default_idle_call+0x74/0xb0 [ 429.916472][ C1] do_idle+0x1e8/0x510 [ 429.916498][ C1] ? __pfx_do_idle+0x10/0x10 [ 429.916529][ C1] cpu_startup_entry+0x44/0x60 [ 429.916550][ C1] start_secondary+0x101/0x110 [ 429.916571][ C1] common_startup_64+0x13e/0x147 [ 429.916612][ C1] [ 429.917105][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 429.917123][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc7-syzkaller-00112-geccf6f2f6ab9 #0 PREEMPT(full) [ 429.917151][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 429.917166][ T31] Call Trace: [ 429.917176][ T31] [ 429.917187][ T31] dump_stack_lvl+0x99/0x250 [ 429.917226][ T31] ? __asan_memcpy+0x40/0x70 [ 429.917254][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 429.917289][ T31] ? __pfx__printk+0x10/0x10 [ 429.917322][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.917357][ T31] panic+0x2db/0x790 [ 429.917398][ T31] ? __pfx_panic+0x10/0x10 [ 429.917429][ T31] ? tick_nohz_tick_stopped+0x86/0xb0 [ 429.917456][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.917488][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.917516][ T31] ? irq_work_queue+0xbc/0x140 [ 429.917552][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.917585][ T31] watchdog+0x102d/0x1030 [ 429.917620][ T31] ? watchdog+0x1de/0x1030 [ 429.917661][ T31] kthread+0x711/0x8a0 [ 429.917697][ T31] ? __pfx_watchdog+0x10/0x10 [ 429.917727][ T31] ? __pfx_kthread+0x10/0x10 [ 429.917755][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.917784][ T31] ? __pfx_kthread+0x10/0x10 [ 429.917868][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 429.917910][ T31] ? srso_alias_return_thunk+0x5/0xfbef5 [ 429.917945][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 429.917984][ T31] ? __pfx_kthread+0x10/0x10 [ 429.918020][ T31] ret_from_fork+0x4e/0x80 [ 429.918052][ T31] ? __pfx_kthread+0x10/0x10 [ 429.918088][ T31] ret_from_fork_asm+0x1a/0x30 [ 429.918139][ T31] [ 430.242839][ T31] Kernel Offset: disabled [ 430.247165][ T31] Rebooting in 86400 seconds..