./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1929723346 <...> Warning: Permanently added '10.128.1.178' (ED25519) to the list of known hosts. execve("./syz-executor1929723346", ["./syz-executor1929723346"], 0x7ffc68ea4730 /* 10 vars */) = 0 brk(NULL) = 0x5555619f6000 brk(0x5555619f6d40) = 0x5555619f6d40 arch_prctl(ARCH_SET_FS, 0x5555619f63c0) = 0 set_tid_address(0x5555619f6690) = 5871 set_robust_list(0x5555619f66a0, 24) = 0 rseq(0x5555619f6ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1929723346", 4096) = 28 getrandom("\xd8\x31\x28\x76\x04\xd1\xbb\x5b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555619f6d40 brk(0x555561a17d40) = 0x555561a17d40 brk(0x555561a18000) = 0x555561a18000 mprotect(0x7f7c08e4e000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5872 attached , child_tidptr=0x5555619f6690) = 5872 [pid 5872] set_robust_list(0x5555619f66a0, 24) = 0 [pid 5872] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5872] setpgid(0, 0) = 0 [pid 5872] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5872] write(3, "1000", 4) = 4 [pid 5872] close(3) = 0 executing program [pid 5872] write(1, "executing program\n", 18) = 18 [pid 5872] futex(0x7f7c08e5430c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5872] rt_sigaction(SIGRT_1, {sa_handler=0x7f7c08df01e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f7c08de1860}, NULL, 8) = 0 [pid 5872] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5872] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f7c08d63000 [pid 5872] mprotect(0x7f7c08d64000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5872] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5872] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f7c08d83990, parent_tid=0x7f7c08d83990, exit_signal=0, stack=0x7f7c08d63000, stack_size=0x20300, tls=0x7f7c08d836c0}./strace-static-x86_64: Process 5873 attached [pid 5873] rseq(0x7f7c08d83fe0, 0x20, 0, 0x53053053) = 0 [pid 5872] <... clone3 resumed> => {parent_tid=[5873]}, 88) = 5873 [pid 5873] set_robust_list(0x7f7c08d839a0, 24) = 0 [pid 5873] rt_sigprocmask(SIG_SETMASK, [], [pid 5872] rt_sigprocmask(SIG_SETMASK, [], [pid 5873] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5872] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5873] futex(0x7f7c08e54308, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5872] futex(0x7f7c08e54308, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5873] mremap(0x200000000000, 4096, 4096, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x200000481000 [pid 5872] futex(0x7f7c08e5430c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5872] exit_group(0) = ? [pid 5871] kill(-5872, SIGKILL) = 0 [pid 5871] kill(5872, SIGKILL) = 0 [pid 5871] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5871] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5871] getdents64(3, 0x5555619f7730 /* 2 entries */, 32768) = 48 [pid 5871] getdents64(3, 0x5555619f7730 /* 0 entries */, 32768) = 0 [pid 5871] close(3) = 0 [ 429.870327][ T31] INFO: task syz-executor192:5872 blocked for more than 143 seconds. [ 429.878505][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 429.885788][ T31] Blocked by coredump. [ 429.890577][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.899262][ T31] task:syz-executor192 state:D stack:26920 pid:5872 tgid:5872 ppid:5871 task_flags:0x40004c flags:0x00004002 [ 429.911980][ T31] Call Trace: [ 429.915312][ T31] [ 429.918257][ T31] __schedule+0x1737/0x4d30 [ 429.923234][ T31] ? __lock_acquire+0xab9/0xd20 [ 429.928113][ T31] ? schedule+0x165/0x360 [ 429.933450][ T31] ? __lock_acquire+0xab9/0xd20 [ 429.938329][ T31] ? __pfx___schedule+0x10/0x10 [ 429.944042][ T31] ? schedule+0x91/0x360 [ 429.948314][ T31] schedule+0x165/0x360 [ 429.953546][ T31] schedule_preempt_disabled+0x13/0x30 [ 429.959023][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 429.964977][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 429.971017][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 429.977110][ T31] ? exit_mm+0xcc/0x2c0 [ 429.981665][ T31] ? __pfx_mm_release+0x10/0x10 [ 429.986526][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 429.992154][ T31] down_read+0x98/0x2e0 [ 429.996324][ T31] exit_mm+0xcc/0x2c0 [ 430.000689][ T31] ? __pfx_exit_mm+0x10/0x10 [ 430.005301][ T31] ? rcu_is_watching+0x15/0xb0 [ 430.010474][ T31] do_exit+0x648/0x2300 [ 430.014659][ T31] ? __pfx_do_exit+0x10/0x10 [ 430.019277][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.025037][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.030575][ T31] do_group_exit+0x21c/0x2d0 [ 430.035204][ T31] __x64_sys_exit_group+0x3f/0x40 [ 430.041067][ T31] x64_sys_call+0x21f7/0x2200 [ 430.045765][ T31] do_syscall_64+0xfa/0x3b0 [ 430.050719][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.055935][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.062410][ T31] ? clear_bhb_loop+0x60/0xb0 [ 430.067113][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.073462][ T31] RIP: 0033:0x7f7c08dc8309 [ 430.077890][ T31] RSP: 002b:00007ffef558f6d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 430.086716][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7c08dc8309 [ 430.095086][ T31] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 430.103362][ T31] RBP: 00007f7c08e542b0 R08: ffffffffffffffb0 R09: 7fffffffffffffff [ 430.111673][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7c08e542b0 [ 430.119757][ T31] R13: 0000000000000000 R14: 00007f7c08e54e40 R15: 00007f7c08d96120 [ 430.128252][ T31] [ 430.131596][ T31] [ 430.131596][ T31] Showing all locks held in the system: [ 430.139321][ T31] 1 lock held by khungtaskd/31: [ 430.144647][ T31] #0: ffffffff8e13d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.155617][ T31] 2 locks held by getty/5609: [ 430.160689][ T31] #0: ffff88814dd6e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.170813][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.181305][ T31] 1 lock held by syz-executor192/5872: [ 430.186768][ T31] #0: ffff8880235457e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 430.195997][ T31] 1 lock held by syz-executor192/5873: [ 430.201809][ T31] [ 430.204146][ T31] ============================================= [ 430.204146][ T31] [ 430.213156][ T31] NMI backtrace for cpu 1 [ 430.213177][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 430.213196][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.213206][ T31] Call Trace: [ 430.213212][ T31] [ 430.213220][ T31] dump_stack_lvl+0x189/0x250 [ 430.213245][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.213264][ T31] ? __pfx__printk+0x10/0x10 [ 430.213296][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.213320][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.213343][ T31] ? __pfx__printk+0x10/0x10 [ 430.213367][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.213392][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.213415][ T31] watchdog+0xf93/0xfe0 [ 430.213440][ T31] ? watchdog+0x1de/0xfe0 [ 430.213466][ T31] kthread+0x70e/0x8a0 [ 430.213488][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.213508][ T31] ? __pfx_kthread+0x10/0x10 [ 430.213527][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.213549][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.213570][ T31] ? __pfx_kthread+0x10/0x10 [ 430.213589][ T31] ret_from_fork+0x3f9/0x770 [ 430.213608][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.213629][ T31] ? __switch_to_asm+0x39/0x70 [ 430.213647][ T31] ? __switch_to_asm+0x33/0x70 [ 430.213664][ T31] ? __pfx_kthread+0x10/0x10 [ 430.213691][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.213724][ T31] [ 430.213730][ T31] Sending NMI from CPU 1 to CPUs 0: [ 430.361596][ C0] NMI backtrace for cpu 0 [ 430.361613][ C0] CPU: 0 UID: 0 PID: 5873 Comm: syz-executor192 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 430.361631][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.361639][ C0] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x18/0x90 [ 430.361664][ C0] Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 d0 a3 92 65 8b 15 28 1a e4 10 <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 3c 16 00 00 [ 430.361676][ C0] RSP: 0018:ffffc9000432f278 EFLAGS: 00000246 [ 430.361690][ C0] RAX: ffffffff8b70c9d2 RBX: 0000000000000004 RCX: ffff888032c20000 [ 430.361701][ C0] RDX: 0000000080000000 RSI: 00001faf2855dfff RDI: 0000000000000000 [ 430.361710][ C0] RBP: ffffc9000432f450 R08: ffff888032c20000 R09: 0000000000000004 [ 430.361720][ C0] R10: 0000000000000003 R11: 0000000000000000 R12: ffff8880735b5428 [ 430.361729][ C0] R13: 00001faf2855dfff R14: 00001faf2755ffff R15: ffff8880735b5428 [ 430.361740][ C0] FS: 00007f7c08d836c0(0000) GS:ffff888125be3000(0000) knlGS:0000000000000000 [ 430.361752][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.361762][ C0] CR2: 00005652d47ee660 CR3: 000000001decc000 CR4: 00000000003526f0 [ 430.361776][ C0] Call Trace: [ 430.361782][ C0] [ 430.361788][ C0] mt_validate+0xbe2/0x4380 [ 430.361809][ C0] ? __pfx_mt_validate+0x10/0x10 [ 430.361835][ C0] validate_mm+0xb6/0x4b0 [ 430.361853][ C0] ? __pfx_validate_mm+0x10/0x10 [ 430.361876][ C0] vma_link+0x366/0x450 [ 430.361892][ C0] ? __pfx_vma_link+0x10/0x10 [ 430.361910][ C0] ? anon_vma_clone+0x49b/0x4f0 [ 430.361928][ C0] ? anon_vma_name+0x87/0xf0 [ 430.361946][ C0] ? vm_area_dup+0x4f5/0x680 [ 430.361962][ C0] copy_vma+0x70c/0x940 [ 430.361981][ C0] ? __pfx_copy_vma+0x10/0x10 [ 430.361999][ C0] ? __pfx_move_page_tables+0x10/0x10 [ 430.362013][ C0] ? irqentry_exit+0x74/0x90 [ 430.362038][ C0] move_vma+0x81f/0x1840 [ 430.362052][ C0] ? __lock_acquire+0xab9/0xd20 [ 430.362079][ C0] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 430.362095][ C0] ? __pfx_move_vma+0x10/0x10 [ 430.362112][ C0] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 430.362132][ C0] ? cap_mmap_addr+0xb0/0x100 [ 430.362150][ C0] ? bpf_lsm_mmap_addr+0x9/0x20 [ 430.362166][ C0] ? security_mmap_addr+0x71/0x270 [ 430.362187][ C0] mremap_to+0x6d6/0x7a0 [ 430.362206][ C0] ? __pfx_mremap_to+0x10/0x10 [ 430.362223][ C0] ? check_prep_vma+0x740/0xae0 [ 430.362243][ C0] __se_sys_mremap+0xa0b/0xef0 [ 430.362268][ C0] ? __pfx___se_sys_mremap+0x10/0x10 [ 430.362286][ C0] ? __pfx_ptrace_notify+0x10/0x10 [ 430.362311][ C0] ? __x64_sys_mremap+0x20/0xc0 [ 430.362327][ C0] do_syscall_64+0xfa/0x3b0 [ 430.362341][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.362355][ C0] ? __switch_to_asm+0x39/0x70 [ 430.362371][ C0] ? clear_bhb_loop+0x60/0xb0 [ 430.362387][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.362400][ C0] RIP: 0033:0x7f7c08dca2a9 [ 430.362413][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 [ 430.362430][ C0] RSP: 002b:00007f7c08d83238 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 430.362444][ C0] RAX: ffffffffffffffda RBX: 00007f7c08e54308 RCX: 00007f7c08dca2a9 [ 430.362455][ C0] RDX: 0000000000001000 RSI: 0000000000001000 RDI: 0000200000000000 [ 430.362464][ C0] RBP: 00007f7c08e54300 R08: 0000200000481000 R09: 00007f7c08d836c0 [ 430.362474][ C0] R10: 0000000000000007 R11: 0000000000000246 R12: 0000200000000000 [ 430.362484][ C0] R13: 0000000000000000 R14: 00007ffef558f570 R15: 00007ffef558f658 [ 430.362501][ C0] [ 430.363704][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.736289][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 430.747554][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 430.757596][ T31] Call Trace: [ 430.760891][ T31] [ 430.763813][ T31] dump_stack_lvl+0x99/0x250 [ 430.768485][ T31] ? __asan_memcpy+0x40/0x70 [ 430.773239][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.778427][ T31] ? __pfx__printk+0x10/0x10 [ 430.783017][ T31] vpanic+0x281/0x750 [ 430.786988][ T31] ? __pfx_vpanic+0x10/0x10 [ 430.791480][ T31] ? preempt_schedule+0xae/0xc0 [ 430.796324][ T31] ? preempt_schedule_common+0x83/0xd0 [ 430.801870][ T31] panic+0xb9/0xc0 [ 430.805580][ T31] ? __pfx_panic+0x10/0x10 [ 430.810009][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 430.815386][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 430.821527][ T31] watchdog+0xfd2/0xfe0 [ 430.825679][ T31] ? watchdog+0x1de/0xfe0 [ 430.830002][ T31] kthread+0x70e/0x8a0 [ 430.834064][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.838745][ T31] ? __pfx_kthread+0x10/0x10 [ 430.843324][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.848517][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.853707][ T31] ? __pfx_kthread+0x10/0x10 [ 430.858378][ T31] ret_from_fork+0x3f9/0x770 [ 430.862955][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 430.868052][ T31] ? __switch_to_asm+0x39/0x70 [ 430.872800][ T31] ? __switch_to_asm+0x33/0x70 [ 430.877560][ T31] ? __pfx_kthread+0x10/0x10 [ 430.882154][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.886920][ T31] [ 430.890262][ T31] Kernel Offset: disabled [ 430.894579][ T31] Rebooting in 86400 seconds..