./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor117106861 <...> Warning: Permanently added '10.128.10.30' (ED25519) to the list of known hosts. execve("./syz-executor117106861", ["./syz-executor117106861"], 0x7ffdf608b140 /* 10 vars */) = 0 brk(NULL) = 0x55555ebd6000 brk(0x55555ebd6d00) = 0x55555ebd6d00 arch_prctl(ARCH_SET_FS, 0x55555ebd6380) = 0 set_tid_address(0x55555ebd6650) = 5841 set_robust_list(0x55555ebd6660, 24) = 0 rseq(0x55555ebd6ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor117106861", 4096) = 27 getrandom("\x5a\x81\x78\x51\xdf\x17\x39\x94", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555ebd6d00 brk(0x55555ebf7d00) = 0x55555ebf7d00 brk(0x55555ebf8000) = 0x55555ebf8000 mprotect(0x7f255b5c9000, 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.VPyo3o", 0700) = 0 chmod("./syzkaller.VPyo3o", 0777) = 0 chdir("./syzkaller.VPyo3o") = 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 5842 attached [pid 5842] set_robust_list(0x55555ebd6660, 24) = 0 [pid 5842] chdir("./0") = 0 [pid 5842] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5841] <... clone resumed>, child_tidptr=0x55555ebd6650) = 5842 [pid 5842] <... prctl resumed>) = 0 [pid 5842] setpgid(0, 0) = 0 [pid 5842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5842] write(3, "1000", 4) = 4 [pid 5842] close(3) = 0 [pid 5842] symlink("/dev/binderfs", "./binderfs") = 0 executing program [pid 5842] write(1, "executing program\n", 18) = 18 [pid 5842] memfd_create("syzkaller", 0) = 3 [pid 5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2553000000 [pid 5842] 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 5842] munmap(0x7f2553000000, 138412032) = 0 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5842] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5842] close(3) = 0 [pid 5842] close(4) = 0 [ 121.172563][ T5842] loop0: detected capacity change from 0 to 8 [pid 5842] mkdir("./file0", 0777) = 0 [pid 5842] mount("/dev/loop0", "./file0", "squashfs", MS_SYNCHRONOUS, "") = 0 [pid 5842] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5842] chdir("./file0") = 0 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5842] open("./file2", O_RDONLY [pid 5841] kill(-5842, SIGKILL) = 0 [pid 5842] <... open resumed>) = ? [pid 5841] kill(5842, SIGKILL) = 0 [pid 5842] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5842, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted kill ...>) = 0 umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 126.067332][ T30] audit: type=1800 audit(1748080691.291:2): pid=5842 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed comm="syz-executor117" name="file2" dev="loop0" ino=6 res=0 errno=0 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, 0x55555ebd76f0 /* 4 entries */, 32768) = 112 [ 286.203106][ T31] INFO: task syz-executor117:5841 blocked for more than 143 seconds. [ 286.211221][ T31] Not tainted 6.15.0-rc7-syzkaller-00142-g4856ebd99715 #0 [ 286.218957][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.227685][ T31] task:syz-executor117 state:D stack:25272 pid:5841 tgid:5841 ppid:5838 task_flags:0x400100 flags:0x00004002 [ 286.239705][ T31] Call Trace: [ 286.243038][ T31] [ 286.245980][ T31] __schedule+0x168f/0x4c70 [ 286.250543][ T31] ? schedule+0x165/0x360 [ 286.254942][ T31] ? __lock_acquire+0xaac/0xd20 [ 286.259832][ T31] ? __pfx___schedule+0x10/0x10 [ 286.264757][ T31] ? schedule+0x91/0x360 [ 286.269012][ T31] schedule+0x165/0x360 [ 286.273203][ T31] io_schedule+0x81/0xe0 [ 286.277456][ T31] folio_wait_bit_common+0x6b0/0xb90 [ 286.282816][ T31] ? __pfx_folio_wait_bit_common+0x10/0x10 [ 286.288641][ T31] ? __pfx_wake_page_function+0x10/0x10 [ 286.294242][ T31] ? folios_put_refs+0x560/0x640 [ 286.299193][ T31] ? __pfx_find_lock_entries+0x10/0x10 [ 286.304706][ T31] __filemap_get_folio+0x139/0xaf0 [ 286.309842][ T31] truncate_inode_pages_range+0x3ed/0xda0 [ 286.315606][ T31] ? evict+0x847/0x9c0 [ 286.319696][ T31] ? evict_inodes+0x636/0x6c0 [ 286.324429][ T31] ? generic_shutdown_super+0x9a/0x2c0 [ 286.329905][ T31] ? kill_block_super+0x44/0x90 [ 286.334801][ T31] ? deactivate_locked_super+0xbc/0x130 [ 286.340365][ T31] ? __pfx_truncate_inode_pages_range+0x10/0x10 [ 286.346693][ T31] ? syscall_exit_to_user_mode+0x12/0x120 [ 286.352489][ T31] ? __lock_acquire+0xaac/0xd20 [ 286.357392][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.362672][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.367890][ T31] evict+0x517/0x9c0 [ 286.371845][ T31] ? __pfx_evict+0x10/0x10 [ 286.376276][ T31] ? do_raw_spin_unlock+0x122/0x240 [ 286.381467][ T31] evict_inodes+0x636/0x6c0 [ 286.386029][ T31] ? __pfx_evict_inodes+0x10/0x10 [ 286.391073][ T31] generic_shutdown_super+0x9a/0x2c0 [ 286.396399][ T31] kill_block_super+0x44/0x90 [ 286.401227][ T31] deactivate_locked_super+0xbc/0x130 [ 286.406659][ T31] cleanup_mnt+0x425/0x4c0 [ 286.411092][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.416322][ T31] task_work_run+0x1d4/0x260 [ 286.420930][ T31] ? __pfx_task_work_run+0x10/0x10 [ 286.426087][ T31] ? path_umount+0x249/0xf70 [ 286.430726][ T31] ptrace_notify+0x281/0x2c0 [ 286.435358][ T31] ? __pfx_ptrace_notify+0x10/0x10 [ 286.440506][ T31] ? __pfx_path_umount+0x10/0x10 [ 286.445522][ T31] ? user_path_at+0x44/0x60 [ 286.450063][ T31] syscall_exit_work+0xc2/0x1d0 [ 286.454981][ T31] syscall_exit_to_user_mode_prepare+0x6f/0xe0 [ 286.461158][ T31] syscall_exit_to_user_mode+0x12/0x120 [ 286.466760][ T31] do_syscall_64+0x103/0x210 [ 286.471416][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.476129][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.482091][ T31] RIP: 0033:0x7f255b555447 [ 286.486529][ T31] RSP: 002b:00007ffc4ea5b938 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 286.494968][ T31] RAX: 0000000000000000 RBX: 0000000000000063 RCX: 00007f255b555447 [ 286.503002][ T31] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc4ea5b9f0 [ 286.511011][ T31] RBP: 00007ffc4ea5b9f0 R08: 0000000000000000 R09: 0000000000000000 [ 286.519117][ T31] R10: 00000000ffffffff R11: 0000000000000202 R12: 00007ffc4ea5ca60 [ 286.527152][ T31] R13: 000055555ebd76c0 R14: 0000000000000001 R15: 431bde82d7b634db [ 286.535169][ T31] [ 286.538203][ T31] [ 286.538203][ T31] Showing all locks held in the system: [ 286.545962][ T31] 1 lock held by khungtaskd/31: [ 286.550899][ T31] #0: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.560809][ T31] 1 lock held by klogd/5176: [ 286.565431][ T31] #0: ffff8880b89399d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 [ 286.575406][ T31] 2 locks held by getty/5581: [ 286.580091][ T31] #0: ffff888030a5a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.589952][ T31] #1: ffffc900033332f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.600124][ T31] 1 lock held by syz-executor117/5841: [ 286.605634][ T31] #0: ffff88807c51a0e0 (&type->s_umount_key#43){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 [ 286.615886][ T31] [ 286.618202][ T31] ============================================= [ 286.618202][ T31] [ 286.626695][ T31] NMI backtrace for cpu 0 [ 286.626714][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc7-syzkaller-00142-g4856ebd99715 #0 PREEMPT(full) [ 286.626733][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.626743][ T31] Call Trace: [ 286.626749][ T31] [ 286.626756][ T31] dump_stack_lvl+0x189/0x250 [ 286.626779][ T31] ? __wake_up_klogd+0xd9/0x110 [ 286.626801][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.626822][ T31] ? __pfx__printk+0x10/0x10 [ 286.626859][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.626879][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.626890][ T31] ? _printk+0xcf/0x120 [ 286.626913][ T31] ? __pfx__printk+0x10/0x10 [ 286.626935][ T31] ? debug_show_all_locks+0x2e/0x180 [ 286.626958][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.626973][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.626989][ T31] watchdog+0xfee/0x1030 [ 286.627008][ T31] ? watchdog+0x1de/0x1030 [ 286.627029][ T31] kthread+0x711/0x8a0 [ 286.627046][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.627061][ T31] ? __pfx_kthread+0x10/0x10 [ 286.627076][ T31] ? __pfx_kthread+0x10/0x10 [ 286.627091][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.627106][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.627121][ T31] ? __pfx_kthread+0x10/0x10 [ 286.627135][ T31] ret_from_fork+0x4b/0x80 [ 286.627148][ T31] ? __pfx_kthread+0x10/0x10 [ 286.627163][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.627194][ T31] [ 286.627202][ T31] Sending NMI from CPU 0 to CPUs 1: [ 286.778967][ C1] NMI backtrace for cpu 1 [ 286.778982][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.15.0-rc7-syzkaller-00142-g4856ebd99715 #0 PREEMPT(full) [ 286.778999][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.779009][ C1] RIP: 0010:pv_native_safe_halt+0x13/0x20 [ 286.779031][ C1] Code: 43 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 a3 8f 18 00 f3 0f 1e fa fb f4 18 d4 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 [ 286.779043][ C1] RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6 [ 286.779056][ C1] RAX: 753d21452d392300 RBX: ffffffff81977028 RCX: 753d21452d392300 [ 286.779067][ C1] RDX: 0000000000000001 RSI: ffffffff8d73aa78 RDI: ffffffff8bc12300 [ 286.779077][ C1] RBP: ffffc90000197f20 R08: ffff8880b8932b5b R09: 1ffff1101712656b [ 286.779087][ C1] R10: dffffc0000000000 R11: ffffed101712656c R12: ffffffff8f7e0b70 [ 286.779097][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110038dcb40 [ 286.779107][ C1] FS: 0000000000000000(0000) GS:ffff8881261f6000(0000) knlGS:0000000000000000 [ 286.779118][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.779128][ C1] CR2: 00005655154e2660 CR3: 000000000dd38000 CR4: 00000000003526f0 [ 286.779140][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.779148][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.779157][ C1] Call Trace: [ 286.779164][ C1] [ 286.779169][ C1] default_idle+0x13/0x20 [ 286.779188][ C1] default_idle_call+0x74/0xb0 [ 286.779209][ C1] do_idle+0x1e8/0x510 [ 286.779233][ C1] ? __pfx_do_idle+0x10/0x10 [ 286.779258][ C1] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 286.779275][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.779291][ C1] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 286.779306][ C1] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 286.779325][ C1] cpu_startup_entry+0x44/0x60 [ 286.779346][ C1] start_secondary+0x101/0x110 [ 286.779367][ C1] common_startup_64+0x13e/0x147 [ 286.779397][ C1] [ 286.780145][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 286.780163][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc7-syzkaller-00142-g4856ebd99715 #0 PREEMPT(full) [ 286.780190][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.780202][ T31] Call Trace: [ 286.780212][ T31] [ 286.780222][ T31] dump_stack_lvl+0x99/0x250 [ 286.780254][ T31] ? __asan_memcpy+0x40/0x70 [ 286.780283][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.780313][ T31] ? __pfx__printk+0x10/0x10 [ 286.780360][ T31] panic+0x2db/0x790 [ 286.780396][ T31] ? __pfx_panic+0x10/0x10 [ 286.780424][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 286.780455][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 286.780480][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 286.780511][ T31] watchdog+0x102d/0x1030 [ 286.780541][ T31] ? watchdog+0x1de/0x1030 [ 286.780576][ T31] kthread+0x711/0x8a0 [ 286.780605][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.780639][ T31] ? __pfx_kthread+0x10/0x10 [ 286.780660][ T31] ? __pfx_kthread+0x10/0x10 [ 286.780680][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.780700][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.780722][ T31] ? __pfx_kthread+0x10/0x10 [ 286.780742][ T31] ret_from_fork+0x4b/0x80 [ 286.780760][ T31] ? __pfx_kthread+0x10/0x10 [ 286.780780][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.780821][ T31] [ 287.117711][ T31] Kernel Offset: disabled [ 287.122035][ T31] Rebooting in 86400 seconds..