./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3524600352 <...> Warning: Permanently added '10.128.0.25' (ED25519) to the list of known hosts. execve("./syz-executor3524600352", ["./syz-executor3524600352"], 0x7ffe951eed80 /* 10 vars */) = 0 brk(NULL) = 0x55555ea02000 brk(0x55555ea02d40) = 0x55555ea02d40 arch_prctl(ARCH_SET_FS, 0x55555ea023c0) = 0 set_tid_address(0x55555ea02690) = 5860 set_robust_list(0x55555ea026a0, 24) = 0 rseq(0x55555ea02ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3524600352", 4096) = 28 getrandom("\xcc\x28\x87\xcc\x28\xac\x46\x70", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555ea02d40 brk(0x55555ea23d40) = 0x55555ea23d40 brk(0x55555ea24000) = 0x55555ea24000 mprotect(0x7ff86257b000, 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 5861 attached , child_tidptr=0x55555ea02690) = 5861 [pid 5861] set_robust_list(0x55555ea026a0, 24) = 0 [pid 5861] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5861] setpgid(0, 0) = 0 [pid 5861] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5861] write(3, "1000", 4) = 4 [pid 5861] close(3) = 0 [pid 5861] write(1, "executing program\n", 18executing program ) = 18 [pid 5861] futex(0x7ff86258130c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5861] rt_sigaction(SIGRT_1, {sa_handler=0x7ff86251d1e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7ff86250e860}, NULL, 8) = 0 [pid 5861] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5861] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7ff862490000 [pid 5861] mprotect(0x7ff862491000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5861] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5861] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7ff8624b0990, parent_tid=0x7ff8624b0990, exit_signal=0, stack=0x7ff862490000, stack_size=0x20300, tls=0x7ff8624b06c0}./strace-static-x86_64: Process 5862 attached => {parent_tid=[5862]}, 88) = 5862 [pid 5862] rseq(0x7ff8624b0fe0, 0x20, 0, 0x53053053 [pid 5861] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5861] futex(0x7ff862581308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5862] <... rseq resumed>) = 0 [pid 5861] <... futex resumed>) = 0 [pid 5862] set_robust_list(0x7ff8624b09a0, 24 [pid 5861] futex(0x7ff86258130c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5862] <... set_robust_list resumed>) = 0 [pid 5862] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5862] mremap(0x2000005ab000, 4096, 4096, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x200000ffe000 [pid 5861] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5861] exit_group(0) = ? [pid 5860] kill(-5861, SIGKILL) = 0 [pid 5860] kill(5861, SIGKILL) = 0 [pid 5860] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5860] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5860] getdents64(3, 0x55555ea03730 /* 2 entries */, 32768) = 48 [pid 5860] getdents64(3, 0x55555ea03730 /* 0 entries */, 32768) = 0 [pid 5860] close(3) = 0 [ 286.819620][ T31] INFO: task syz-executor352:5861 blocked for more than 143 seconds. [ 286.828552][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 286.835976][ T31] Blocked by coredump. [ 286.841779][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.851001][ T31] task:syz-executor352 state:D stack:26920 pid:5861 tgid:5861 ppid:5860 task_flags:0x40004c flags:0x00004002 [ 286.863800][ T31] Call Trace: [ 286.867496][ T31] [ 286.870565][ T31] __schedule+0x1737/0x4d30 [ 286.875605][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.881561][ T31] ? schedule+0x165/0x360 [ 286.885959][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.891739][ T31] ? __pfx___schedule+0x10/0x10 [ 286.896751][ T31] ? schedule+0x91/0x360 [ 286.901654][ T31] schedule+0x165/0x360 [ 286.905963][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.912049][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 286.918117][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 286.923984][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 286.931846][ T31] ? exit_mm+0xcc/0x2c0 [ 286.936079][ T31] ? __pfx_mm_release+0x10/0x10 [ 286.942114][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.947882][ T31] down_read+0x98/0x2e0 [ 286.952108][ T31] exit_mm+0xcc/0x2c0 [ 286.956245][ T31] ? __pfx_exit_mm+0x10/0x10 [ 286.961596][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.966510][ T31] do_exit+0x648/0x2300 [ 286.971229][ T31] ? __pfx_do_exit+0x10/0x10 [ 286.975891][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.981648][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.987275][ T31] do_group_exit+0x21c/0x2d0 [ 286.992012][ T31] __x64_sys_exit_group+0x3f/0x40 [ 286.997762][ T31] x64_sys_call+0x21f7/0x2200 [ 287.002676][ T31] do_syscall_64+0xfa/0x3b0 [ 287.007757][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.013018][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.019924][ T31] ? clear_bhb_loop+0x60/0xb0 [ 287.024757][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.031295][ T31] RIP: 0033:0x7ff8624f5309 [ 287.035862][ T31] RSP: 002b:00007ffda16ec0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 287.045004][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff8624f5309 [ 287.054089][ T31] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 287.062593][ T31] RBP: 00007ff8625812b0 R08: ffffffffffffffb0 R09: 7fffffffffffffff [ 287.071064][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff8625812b0 [ 287.079475][ T31] R13: 0000000000000000 R14: 00007ff862581e40 R15: 00007ff8624c3120 [ 287.087837][ T31] [ 287.091051][ T31] [ 287.091051][ T31] Showing all locks held in the system: [ 287.099092][ T31] 1 lock held by khungtaskd/31: [ 287.103976][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 287.114877][ T31] 2 locks held by getty/5609: [ 287.119900][ T31] #0: ffff88814dc240a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.130150][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 287.140896][ T31] 1 lock held by syz-executor352/5861: [ 287.146395][ T31] #0: ffff8880484fcd20 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 287.155776][ T31] 1 lock held by syz-executor352/5862: [ 287.162153][ T31] [ 287.164518][ T31] ============================================= [ 287.164518][ T31] [ 287.173324][ T31] NMI backtrace for cpu 0 [ 287.173359][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.173382][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.173394][ T31] Call Trace: [ 287.173402][ T31] [ 287.173410][ T31] dump_stack_lvl+0x189/0x250 [ 287.173446][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.173475][ T31] ? __pfx__printk+0x10/0x10 [ 287.173516][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.173544][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.173571][ T31] ? __pfx__printk+0x10/0x10 [ 287.173604][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.173630][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.173658][ T31] watchdog+0xf93/0xfe0 [ 287.173684][ T31] ? watchdog+0x1de/0xfe0 [ 287.173711][ T31] kthread+0x70e/0x8a0 [ 287.173744][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.173764][ T31] ? __pfx_kthread+0x10/0x10 [ 287.173794][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.173820][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.173845][ T31] ? __pfx_kthread+0x10/0x10 [ 287.173875][ T31] ret_from_fork+0x3f9/0x770 [ 287.173902][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.173933][ T31] ? __switch_to_asm+0x39/0x70 [ 287.173950][ T31] ? __switch_to_asm+0x33/0x70 [ 287.173965][ T31] ? __pfx_kthread+0x10/0x10 [ 287.173995][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.174030][ T31] [ 287.174037][ T31] Sending NMI from CPU 0 to CPUs 1: [ 287.323324][ C1] NMI backtrace for cpu 1 [ 287.323343][ C1] CPU: 1 UID: 0 PID: 5862 Comm: syz-executor352 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.323364][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.323375][ C1] RIP: 0010:mas_next_slot+0x896/0xcf0 [ 287.323403][ C1] Code: 48 f6 45 31 f6 eb 17 e8 98 aa 48 f6 4d 8d 75 08 eb 0c e8 8d aa 48 f6 4d 8d b5 80 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 ff e8 80 fa ab f6 49 8b 1f 48 8b 44 24 48 42 0f b6 04 [ 287.323417][ C1] RSP: 0018:ffffc900041b7320 EFLAGS: 00000246 [ 287.323433][ C1] RAX: 1ffff92000836e98 RBX: 00001ff226ffffff RCX: ffff8880331a3c00 [ 287.323445][ C1] RDX: 0000000000000000 RSI: ffffffff8fca8d80 RDI: 0000000000000001 [ 287.323456][ C1] RBP: 0000000000000001 R08: ffff8880331a3c00 R09: 0000000000000004 [ 287.323466][ C1] R10: 0000000000000003 R11: 0000000000000000 R12: dffffc0000000000 [ 287.323477][ C1] R13: ffff888073fbea00 R14: ffff888073fbea80 R15: ffffc900041b74c0 [ 287.323490][ C1] FS: 00007ff8624b06c0(0000) GS:ffff8881258ab000(0000) knlGS:0000000000000000 [ 287.323504][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.323516][ C1] CR2: 000055694d19a168 CR3: 0000000077e26000 CR4: 00000000003526f0 [ 287.323531][ C1] Call Trace: [ 287.323541][ C1] [ 287.323560][ C1] mas_find+0xb0e/0xd30 [ 287.323588][ C1] validate_mm+0xe1/0x4b0 [ 287.323616][ C1] ? __pfx_validate_mm+0x10/0x10 [ 287.323649][ C1] vma_link+0x366/0x450 [ 287.323675][ C1] ? __pfx_vma_link+0x10/0x10 [ 287.323702][ C1] ? anon_vma_clone+0x49b/0x4f0 [ 287.323765][ C1] ? anon_vma_name+0x87/0xf0 [ 287.323784][ C1] ? vm_area_dup+0x4f5/0x680 [ 287.323807][ C1] copy_vma+0x70c/0x940 [ 287.323836][ C1] ? __pfx_copy_vma+0x10/0x10 [ 287.323864][ C1] ? __pfx_move_page_tables+0x10/0x10 [ 287.323887][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.323924][ C1] move_vma+0x81f/0x1840 [ 287.323948][ C1] ? __lock_acquire+0xab9/0xd20 [ 287.323977][ C1] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 287.324001][ C1] ? __pfx_move_vma+0x10/0x10 [ 287.324028][ C1] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 287.324057][ C1] ? cap_mmap_addr+0xb0/0x100 [ 287.324078][ C1] ? bpf_lsm_mmap_addr+0x9/0x20 [ 287.324094][ C1] ? security_mmap_addr+0x71/0x270 [ 287.324119][ C1] mremap_to+0x6d6/0x7a0 [ 287.324148][ C1] ? __pfx_mremap_to+0x10/0x10 [ 287.324182][ C1] ? check_prep_vma+0x740/0xae0 [ 287.324212][ C1] __se_sys_mremap+0xa0b/0xef0 [ 287.324254][ C1] ? __pfx___se_sys_mremap+0x10/0x10 [ 287.324281][ C1] ? __pfx_ptrace_notify+0x10/0x10 [ 287.324309][ C1] ? __x64_sys_mremap+0x20/0xc0 [ 287.324334][ C1] do_syscall_64+0xfa/0x3b0 [ 287.324360][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.324376][ C1] ? __switch_to_asm+0x39/0x70 [ 287.324391][ C1] ? clear_bhb_loop+0x60/0xb0 [ 287.324411][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.324427][ C1] RIP: 0033:0x7ff8624f72a9 [ 287.324442][ C1] 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 [ 287.324456][ C1] RSP: 002b:00007ff8624b0238 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 287.324472][ C1] RAX: ffffffffffffffda RBX: 00007ff862581308 RCX: 00007ff8624f72a9 [ 287.324485][ C1] RDX: 0000000000001000 RSI: 0000000000001000 RDI: 00002000005ab000 [ 287.324496][ C1] RBP: 00007ff862581300 R08: 0000200000ffe000 R09: 00007ff8624b06c0 [ 287.324507][ C1] R10: 0000000000000007 R11: 0000000000000246 R12: 00002000005ab000 [ 287.324517][ C1] R13: 0000000000000000 R14: 00007ffda16ebf80 R15: 00007ffda16ec068 [ 287.324537][ C1] [ 287.324546][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.223 msecs [ 287.325440][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.705464][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.716783][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.726941][ T31] Call Trace: [ 287.730317][ T31] [ 287.733346][ T31] dump_stack_lvl+0x99/0x250 [ 287.737964][ T31] ? __asan_memcpy+0x40/0x70 [ 287.742617][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.747873][ T31] ? __pfx__printk+0x10/0x10 [ 287.752492][ T31] vpanic+0x281/0x750 [ 287.756498][ T31] ? __pfx_vpanic+0x10/0x10 [ 287.761011][ T31] ? __x2apic_send_IPI_mask+0x1e4/0x260 [ 287.766585][ T31] ? preempt_schedule+0xae/0xc0 [ 287.771469][ T31] ? preempt_schedule_common+0x83/0xd0 [ 287.777124][ T31] panic+0xb9/0xc0 [ 287.780863][ T31] ? __pfx_panic+0x10/0x10 [ 287.785380][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.790802][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 287.796974][ T31] watchdog+0xfd2/0xfe0 [ 287.801197][ T31] ? watchdog+0x1de/0xfe0 [ 287.805734][ T31] kthread+0x70e/0x8a0 [ 287.809832][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.814538][ T31] ? __pfx_kthread+0x10/0x10 [ 287.819156][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.824393][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.829703][ T31] ? __pfx_kthread+0x10/0x10 [ 287.834335][ T31] ret_from_fork+0x3f9/0x770 [ 287.839037][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.844175][ T31] ? __switch_to_asm+0x39/0x70 [ 287.849046][ T31] ? __switch_to_asm+0x33/0x70 [ 287.854000][ T31] ? __pfx_kthread+0x10/0x10 [ 287.858608][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.863586][ T31] [ 287.866999][ T31] Kernel Offset: disabled [ 287.871432][ T31] Rebooting in 86400 seconds..