./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor271704283 <...> Warning: Permanently added '10.128.1.39' (ED25519) to the list of known hosts. execve("./syz-executor271704283", ["./syz-executor271704283"], 0x7fffad428730 /* 10 vars */) = 0 brk(NULL) = 0x5555747f8000 brk(0x5555747f8d40) = 0x5555747f8d40 arch_prctl(ARCH_SET_FS, 0x5555747f83c0) = 0 set_tid_address(0x5555747f8690) = 5851 set_robust_list(0x5555747f86a0, 24) = 0 rseq(0x5555747f8ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor271704283", 4096) = 27 getrandom("\x81\x3c\xa7\x12\x0b\xe5\xbc\xab", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555747f8d40 brk(0x555574819d40) = 0x555574819d40 brk(0x55557481a000) = 0x55557481a000 mprotect(0x7f6600d47000, 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 5852 attached [pid 5852] set_robust_list(0x5555747f86a0, 24 [pid 5851] <... clone resumed>, child_tidptr=0x5555747f8690) = 5852 [pid 5852] <... set_robust_list resumed>) = 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] write(1, "executing program\n", 18executing program ) = 18 [pid 5852] futex(0x7f6600d4d30c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5852] rt_sigaction(SIGRT_1, {sa_handler=0x7f6600ce91e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f6600cda860}, NULL, 8) = 0 [pid 5852] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5852] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6600c5c000 [pid 5852] mprotect(0x7f6600c5d000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5852] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5852] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f6600c7c990, parent_tid=0x7f6600c7c990, exit_signal=0, stack=0x7f6600c5c000, stack_size=0x20300, tls=0x7f6600c7c6c0}./strace-static-x86_64: Process 5853 attached => {parent_tid=[5853]}, 88) = 5853 [pid 5853] rseq(0x7f6600c7cfe0, 0x20, 0, 0x53053053 [pid 5852] rt_sigprocmask(SIG_SETMASK, [], [pid 5853] <... rseq resumed>) = 0 [pid 5853] set_robust_list(0x7f6600c7c9a0, 24 [pid 5852] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5853] <... set_robust_list resumed>) = 0 [pid 5852] futex(0x7f6600d4d308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5853] rt_sigprocmask(SIG_SETMASK, [], [pid 5852] <... futex resumed>) = 0 [pid 5853] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5852] futex(0x7f6600d4d30c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5853] mremap(0x2000003c9000, 8192, 8192, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x2000001de000 [pid 5852] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5852] futex(0x7f6600d4d31c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 91.899813][ T984] cfg80211: failed to load regulatory.db [pid 5852] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5851] kill(-5852, SIGKILL) = 0 [pid 5852] <... mmap resumed>) = ? [pid 5851] kill(5852, SIGKILL) = 0 [pid 5851] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5851] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5851] getdents64(3, 0x5555747f9730 /* 2 entries */, 32768) = 48 [pid 5851] getdents64(3, 0x5555747f9730 /* 0 entries */, 32768) = 0 [pid 5851] close(3) = 0 [ 286.461180][ T31] INFO: task syz-executor271:5852 blocked for more than 143 seconds. [ 286.469482][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 286.476636][ T31] Blocked by coredump. [ 286.481643][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.490681][ T31] task:syz-executor271 state:D stack:26232 pid:5852 tgid:5852 ppid:5851 task_flags:0x40044c flags:0x00004006 [ 286.503666][ T31] Call Trace: [ 286.506987][ T31] [ 286.510642][ T31] __schedule+0x1737/0x4d30 [ 286.515279][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.520817][ T31] ? schedule+0x165/0x360 [ 286.525197][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.530397][ T31] ? __pfx___schedule+0x10/0x10 [ 286.535319][ T31] ? schedule+0x91/0x360 [ 286.539880][ T31] schedule+0x165/0x360 [ 286.544170][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.549990][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 286.555572][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 286.561636][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 286.567994][ T31] ? exit_mm+0xcc/0x2c0 [ 286.572231][ T31] ? __pfx_mm_release+0x10/0x10 [ 286.577111][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.582720][ T31] down_read+0x98/0x2e0 [ 286.586923][ T31] exit_mm+0xcc/0x2c0 [ 286.591275][ T31] ? __pfx_exit_mm+0x10/0x10 [ 286.595919][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.601085][ T31] do_exit+0x648/0x2300 [ 286.605301][ T31] ? do_raw_spin_lock+0x121/0x290 [ 286.610694][ T31] ? __pfx_do_exit+0x10/0x10 [ 286.615365][ T31] do_group_exit+0x21c/0x2d0 [ 286.620285][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.625539][ T31] get_signal+0x1286/0x1340 [ 286.630688][ T31] arch_do_signal_or_restart+0x9a/0x750 [ 286.636295][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.642132][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 286.647381][ T31] ? __pfx_arch_do_signal_or_restart+0x10/0x10 [ 286.653995][ T31] ? exit_to_user_mode_loop+0x40/0x110 [ 286.659815][ T31] exit_to_user_mode_loop+0x75/0x110 [ 286.665135][ T31] do_syscall_64+0x2bd/0x3b0 [ 286.670099][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.675344][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.681787][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.686578][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.692896][ T31] RIP: 0033:0x7f6600cc32e3 [ 286.697361][ T31] RSP: 002b:00007fff6c0ed968 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 286.706148][ T31] RAX: fffffffffffffffc RBX: fffffffffffff000 RCX: 00007f6600cc32e3 [ 286.714420][ T31] RDX: 0000000000000000 RSI: 0000000000021000 RDI: 0000000000000000 [ 286.722674][ T31] RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000 [ 286.730957][ T31] R10: 0000000000020022 R11: 0000000000000246 R12: 00007fff6c0edb30 [ 286.739243][ T31] R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000 [ 286.747275][ T31] [ 286.751404][ T31] [ 286.751404][ T31] Showing all locks held in the system: [ 286.759924][ T31] 1 lock held by khungtaskd/31: [ 286.764805][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.775279][ T31] 2 locks held by getty/5613: [ 286.780533][ T31] #0: ffff88814ccce0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.790807][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.801318][ T31] 1 lock held by syz-executor271/5852: [ 286.806802][ T31] #0: ffff888027950ca0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 286.816304][ T31] 1 lock held by syz-executor271/5853: [ 286.822243][ T31] [ 286.824601][ T31] ============================================= [ 286.824601][ T31] [ 286.833756][ T31] NMI backtrace for cpu 1 [ 286.833782][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 286.833805][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.833816][ T31] Call Trace: [ 286.833824][ T31] [ 286.833832][ T31] dump_stack_lvl+0x189/0x250 [ 286.833888][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.833916][ T31] ? __pfx__printk+0x10/0x10 [ 286.833958][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.833986][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.834012][ T31] ? __pfx__printk+0x10/0x10 [ 286.834044][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.834076][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.834104][ T31] watchdog+0xf93/0xfe0 [ 286.834140][ T31] ? watchdog+0x1de/0xfe0 [ 286.834167][ T31] kthread+0x70e/0x8a0 [ 286.834209][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.834228][ T31] ? __pfx_kthread+0x10/0x10 [ 286.834258][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.834284][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.834310][ T31] ? __pfx_kthread+0x10/0x10 [ 286.834339][ T31] ret_from_fork+0x3f9/0x770 [ 286.834366][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.834396][ T31] ? __switch_to_asm+0x39/0x70 [ 286.834412][ T31] ? __switch_to_asm+0x33/0x70 [ 286.834428][ T31] ? __pfx_kthread+0x10/0x10 [ 286.834458][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.834491][ T31] [ 286.834499][ T31] Sending NMI from CPU 1 to CPUs 0: [ 286.982606][ C0] NMI backtrace for cpu 0 [ 286.982624][ C0] CPU: 0 UID: 0 PID: 5853 Comm: syz-executor271 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 286.982644][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.982654][ C0] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 [ 286.982679][ C0] Code: 48 89 44 11 20 c3 cc cc cc cc cc 0f 1f 80 00 00 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 14 25 08 50 e7 92 65 8b 0d c8 4a 27 11 81 e1 00 01 ff 00 [ 286.982693][ C0] RSP: 0018:ffffc90003f37318 EFLAGS: 00000206 [ 286.982709][ C0] RAX: ffffffff8b775720 RBX: ffff888027950b00 RCX: 0000000000000000 [ 286.982721][ C0] RDX: ffff888027875a00 RSI: 0000000000000300 RDI: 0000000000000300 [ 286.982731][ C0] RBP: 0000000000000001 R08: ffff888027875a00 R09: 0000000000000004 [ 286.982742][ C0] R10: 0000000000000003 R11: 0000000000000000 R12: dffffc0000000000 [ 286.982752][ C0] R13: ffff88807389c800 R14: ffff8880758b7000 R15: 0000000000000300 [ 286.982764][ C0] FS: 00007f6600c7c6c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 [ 286.982778][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.982790][ C0] CR2: 00005613811d9168 CR3: 00000000777ce000 CR4: 00000000003526f0 [ 286.982805][ C0] Call Trace: [ 286.982812][ C0] [ 286.982819][ C0] mas_next_slot+0x920/0xcf0 [ 286.982855][ C0] mas_find+0xb0e/0xd30 [ 286.982881][ C0] validate_mm+0xe1/0x4b0 [ 286.982950][ C0] ? __pfx_validate_mm+0x10/0x10 [ 286.982984][ C0] vma_link+0x366/0x450 [ 286.983010][ C0] ? __pfx_vma_link+0x10/0x10 [ 286.983038][ C0] ? anon_vma_clone+0x49b/0x4f0 [ 286.983057][ C0] ? anon_vma_name+0x87/0xf0 [ 286.983079][ C0] ? vm_area_dup+0x4f5/0x680 [ 286.983110][ C0] copy_vma+0x70c/0x940 [ 286.983140][ C0] ? __pfx_copy_vma+0x10/0x10 [ 286.983168][ C0] ? __pfx_move_page_tables+0x10/0x10 [ 286.983211][ C0] move_vma+0x81f/0x1840 [ 286.983235][ C0] ? __lock_acquire+0xab9/0xd20 [ 286.983263][ C0] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 286.983287][ C0] ? __pfx_move_vma+0x10/0x10 [ 286.983313][ C0] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 286.983342][ C0] ? cap_mmap_addr+0xb0/0x100 [ 286.983385][ C0] ? bpf_lsm_mmap_addr+0x9/0x20 [ 286.983413][ C0] ? security_mmap_addr+0x71/0x270 [ 286.983439][ C0] mremap_to+0x6d6/0x7a0 [ 286.983468][ C0] ? __pfx_mremap_to+0x10/0x10 [ 286.983494][ C0] ? check_prep_vma+0x740/0xae0 [ 286.983523][ C0] __se_sys_mremap+0xa0b/0xef0 [ 286.983559][ C0] ? __pfx___se_sys_mremap+0x10/0x10 [ 286.983586][ C0] ? __pfx_ptrace_notify+0x10/0x10 [ 286.983613][ C0] ? __x64_sys_mremap+0x20/0xc0 [ 286.983638][ C0] do_syscall_64+0xfa/0x3b0 [ 286.983664][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.983679][ C0] ? __switch_to_asm+0x39/0x70 [ 286.983694][ C0] ? clear_bhb_loop+0x60/0xb0 [ 286.983713][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.983729][ C0] RIP: 0033:0x7f6600cc32a9 [ 286.983744][ 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 [ 286.983757][ C0] RSP: 002b:00007f6600c7c238 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 286.983774][ C0] RAX: ffffffffffffffda RBX: 00007f6600d4d308 RCX: 00007f6600cc32a9 [ 286.983786][ C0] RDX: 0000000000002000 RSI: 0000000000002000 RDI: 00002000003c9000 [ 286.983797][ C0] RBP: 00007f6600d4d300 R08: 00002000001de000 R09: 00007f6600c7c6c0 [ 286.983808][ C0] R10: 0000000000000007 R11: 0000000000000246 R12: 00002000003c9000 [ 286.983818][ C0] R13: 0000000000000000 R14: 00007fff6c0ed8e0 R15: 00007fff6c0ed9c8 [ 286.983838][ C0] [ 286.983845][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.240 msecs [ 286.986244][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.361819][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.373111][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.383174][ T31] Call Trace: [ 287.386547][ T31] [ 287.389521][ T31] dump_stack_lvl+0x99/0x250 [ 287.394132][ T31] ? __asan_memcpy+0x40/0x70 [ 287.398773][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.403988][ T31] ? __pfx__printk+0x10/0x10 [ 287.408599][ T31] vpanic+0x281/0x750 [ 287.412595][ T31] ? __pfx_vpanic+0x10/0x10 [ 287.417115][ T31] ? preempt_schedule+0xae/0xc0 [ 287.421980][ T31] ? preempt_schedule_common+0x83/0xd0 [ 287.427467][ T31] panic+0xb9/0xc0 [ 287.431199][ T31] ? __pfx_panic+0x10/0x10 [ 287.435625][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.441009][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 287.447175][ T31] watchdog+0xfd2/0xfe0 [ 287.451346][ T31] ? watchdog+0x1de/0xfe0 [ 287.455689][ T31] kthread+0x70e/0x8a0 [ 287.459779][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.464460][ T31] ? __pfx_kthread+0x10/0x10 [ 287.469063][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.474272][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.479483][ T31] ? __pfx_kthread+0x10/0x10 [ 287.484092][ T31] ret_from_fork+0x3f9/0x770 [ 287.488699][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.493828][ T31] ? __switch_to_asm+0x39/0x70 [ 287.498596][ T31] ? __switch_to_asm+0x33/0x70 [ 287.503368][ T31] ? __pfx_kthread+0x10/0x10 [ 287.507987][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.512806][ T31] [ 287.516193][ T31] Kernel Offset: disabled [ 287.520540][ T31] Rebooting in 86400 seconds..