./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2578476127 <...> Warning: Permanently added '10.128.1.235' (ED25519) to the list of known hosts. execve("./syz-executor2578476127", ["./syz-executor2578476127"], 0x7ffcb8120fc0 /* 10 vars */) = 0 brk(NULL) = 0x555563ac9000 brk(0x555563ac9d40) = 0x555563ac9d40 arch_prctl(ARCH_SET_FS, 0x555563ac93c0) = 0 set_tid_address(0x555563ac9690) = 5874 set_robust_list(0x555563ac96a0, 24) = 0 rseq(0x555563ac9ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2578476127", 4096) = 28 getrandom("\x1d\x0e\x4d\x73\x93\xbd\xa0\x26", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555563ac9d40 brk(0x555563aead40) = 0x555563aead40 brk(0x555563aeb000) = 0x555563aeb000 mprotect(0x7f21406fc000, 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 5875 attached , child_tidptr=0x555563ac9690) = 5875 [pid 5875] set_robust_list(0x555563ac96a0, 24) = 0 [pid 5875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5875] setpgid(0, 0) = 0 [pid 5875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5875] write(3, "1000", 4) = 4 [pid 5875] close(3) = 0 [pid 5875] write(1, "executing program\n", 18executing program ) = 18 [pid 5875] futex(0x7f214070230c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5875] rt_sigaction(SIGRT_1, {sa_handler=0x7f214069e1e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f214068f860}, NULL, 8) = 0 [pid 5875] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5875] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f2140611000 [pid 5875] mprotect(0x7f2140612000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5875] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5875] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f2140631990, parent_tid=0x7f2140631990, exit_signal=0, stack=0x7f2140611000, stack_size=0x20300, tls=0x7f21406316c0}./strace-static-x86_64: Process 5876 attached => {parent_tid=[5876]}, 88) = 5876 [pid 5875] rt_sigprocmask(SIG_SETMASK, [], [pid 5876] rseq(0x7f2140631fe0, 0x20, 0, 0x53053053 [pid 5875] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5876] <... rseq resumed>) = 0 [pid 5875] futex(0x7f2140702308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5876] set_robust_list(0x7f21406319a0, 24) = 0 [pid 5875] <... futex resumed>) = 0 [pid 5876] rt_sigprocmask(SIG_SETMASK, [], [pid 5875] futex(0x7f214070230c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5876] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5876] mremap(0x200000d59000, 4096, 4096, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x200000a91000 [pid 5875] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5875] exit_group(0) = ? [pid 5874] kill(-5875, SIGKILL) = 0 [pid 5874] kill(5875, SIGKILL) = 0 [pid 5874] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5874] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5874] getdents64(3, 0x555563aca730 /* 2 entries */, 32768) = 48 [pid 5874] getdents64(3, 0x555563aca730 /* 0 entries */, 32768) = 0 [pid 5874] close(3) = 0 [ 286.674439][ T31] INFO: task syz-executor257:5875 blocked for more than 143 seconds. [ 286.682918][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 286.690149][ T31] Blocked by coredump. [ 286.695496][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.705134][ T31] task:syz-executor257 state:D stack:26920 pid:5875 tgid:5875 ppid:5874 task_flags:0x40004c flags:0x00004002 [ 286.717686][ T31] Call Trace: [ 286.720998][ T31] [ 286.724701][ T31] __schedule+0x1737/0x4d30 [ 286.729394][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.734764][ T31] ? schedule+0x165/0x360 [ 286.739135][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.744468][ T31] ? __pfx___schedule+0x10/0x10 [ 286.749375][ T31] ? schedule+0x91/0x360 [ 286.754068][ T31] schedule+0x165/0x360 [ 286.758260][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.764413][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 286.769992][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 286.776205][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 286.782634][ T31] ? exit_mm+0xcc/0x2c0 [ 286.786829][ T31] ? __pfx_mm_release+0x10/0x10 [ 286.792239][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.797505][ T31] down_read+0x98/0x2e0 [ 286.802184][ T31] exit_mm+0xcc/0x2c0 [ 286.806205][ T31] ? __pfx_exit_mm+0x10/0x10 [ 286.810838][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.816366][ T31] do_exit+0x648/0x2300 [ 286.820575][ T31] ? __pfx_do_exit+0x10/0x10 [ 286.825706][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.830938][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.836875][ T31] do_group_exit+0x21c/0x2d0 [ 286.842106][ T31] __x64_sys_exit_group+0x3f/0x40 [ 286.847160][ T31] x64_sys_call+0x21f7/0x2200 [ 286.852240][ T31] do_syscall_64+0xfa/0x3b0 [ 286.856958][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.862725][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.868834][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.873947][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.879867][ T31] RIP: 0033:0x7f2140676309 [ 286.884803][ T31] RSP: 002b:00007ffe4b26f858 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 286.893573][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2140676309 [ 286.901901][ T31] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 286.909903][ T31] RBP: 00007f21407022b0 R08: ffffffffffffffb0 R09: 7fffffffffffffff [ 286.918497][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f21407022b0 [ 286.926882][ T31] R13: 0000000000000000 R14: 00007f2140702e40 R15: 00007f2140644120 [ 286.935207][ T31] [ 286.938314][ T31] [ 286.938314][ T31] Showing all locks held in the system: [ 286.947548][ T31] 1 lock held by khungtaskd/31: [ 286.953062][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.963579][ T31] 5 locks held by kworker/u8:5/1009: [ 286.968913][ T31] 2 locks held by getty/5607: [ 286.974033][ T31] #0: ffff88814de5e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.984166][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.994778][ T31] 1 lock held by syz-executor257/5875: [ 287.000278][ T31] #0: ffff88807c498ca0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 287.009673][ T31] 1 lock held by syz-executor257/5876: [ 287.016131][ T31] [ 287.018475][ T31] ============================================= [ 287.018475][ T31] [ 287.027400][ T31] NMI backtrace for cpu 0 [ 287.027417][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.027437][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.027448][ T31] Call Trace: [ 287.027455][ T31] [ 287.027462][ T31] dump_stack_lvl+0x189/0x250 [ 287.027495][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.027520][ T31] ? __pfx__printk+0x10/0x10 [ 287.027558][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.027584][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.027608][ T31] ? __pfx__printk+0x10/0x10 [ 287.027637][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.027681][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.027705][ T31] watchdog+0xf93/0xfe0 [ 287.027729][ T31] ? watchdog+0x1de/0xfe0 [ 287.027753][ T31] kthread+0x70e/0x8a0 [ 287.027782][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.027861][ T31] ? __pfx_kthread+0x10/0x10 [ 287.027888][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.027910][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.027933][ T31] ? __pfx_kthread+0x10/0x10 [ 287.027958][ T31] ret_from_fork+0x3f9/0x770 [ 287.027983][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.028010][ T31] ? __switch_to_asm+0x39/0x70 [ 287.028024][ T31] ? __switch_to_asm+0x33/0x70 [ 287.028038][ T31] ? __pfx_kthread+0x10/0x10 [ 287.028061][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.028092][ T31] [ 287.028098][ T31] Sending NMI from CPU 0 to CPUs 1: [ 287.177141][ C1] NMI backtrace for cpu 1 [ 287.177159][ C1] CPU: 1 UID: 0 PID: 5876 Comm: syz-executor257 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.177178][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.177187][ C1] RIP: 0010:mas_next_slot+0x83/0xcf0 [ 287.177211][ C1] Code: 8b 68 10 48 8d 48 18 48 8d 50 28 48 8d 70 3d 48 8d 78 3f 4c 8d 70 38 4c 8d 40 20 4c 89 84 24 90 00 00 00 4c 8d 40 08 49 89 c9 <49> c1 e9 03 4d 89 f5 49 c1 ed 03 48 89 94 24 80 00 00 00 48 c1 ea [ 287.177223][ C1] RSP: 0018:ffffc90004257320 EFLAGS: 00000246 [ 287.177239][ C1] RAX: ffffc900042574c0 RBX: ffffc900042574d0 RCX: ffffc900042574d8 [ 287.177250][ C1] RDX: ffffc900042574e8 RSI: ffffc900042574fd RDI: ffffc900042574ff [ 287.177260][ C1] RBP: 00001fd85923bfff R08: ffffc900042574c8 R09: ffffc900042574d8 [ 287.177271][ C1] R10: 0000000000000007 R11: 0000000000000000 R12: dffffc0000000000 [ 287.177281][ C1] R13: ffffc900042574c0 R14: ffffc900042574f8 R15: ffffffffffffffff [ 287.177292][ C1] FS: 00007f21406316c0(0000) GS:ffff8881258ab000(0000) knlGS:0000000000000000 [ 287.177305][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.177315][ C1] CR2: 00005571ffd2d168 CR3: 00000000329ce000 CR4: 00000000003526f0 [ 287.177331][ C1] Call Trace: [ 287.177340][ C1] [ 287.177357][ C1] mas_find+0xb0e/0xd30 [ 287.177380][ C1] validate_mm+0xe1/0x4b0 [ 287.177403][ C1] ? __pfx_validate_mm+0x10/0x10 [ 287.177430][ C1] vma_link+0x366/0x450 [ 287.177451][ C1] ? __pfx_vma_link+0x10/0x10 [ 287.177473][ C1] ? anon_vma_clone+0x49b/0x4f0 [ 287.177490][ C1] ? anon_vma_name+0x87/0xf0 [ 287.177506][ C1] ? vm_area_dup+0x4f5/0x680 [ 287.177525][ C1] copy_vma+0x70c/0x940 [ 287.177548][ C1] ? __pfx_copy_vma+0x10/0x10 [ 287.177570][ C1] ? __pfx_move_page_tables+0x10/0x10 [ 287.177589][ C1] ? irqentry_exit+0x74/0x90 [ 287.177619][ C1] move_vma+0x81f/0x1840 [ 287.177638][ C1] ? __lock_acquire+0xab9/0xd20 [ 287.177663][ C1] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 287.177682][ C1] ? __pfx_move_vma+0x10/0x10 [ 287.177718][ C1] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 287.177741][ C1] ? cap_mmap_addr+0xb0/0x100 [ 287.177760][ C1] ? bpf_lsm_mmap_addr+0x9/0x20 [ 287.177775][ C1] ? security_mmap_addr+0x71/0x270 [ 287.177796][ C1] mremap_to+0x6d6/0x7a0 [ 287.177820][ C1] ? __pfx_mremap_to+0x10/0x10 [ 287.177841][ C1] ? check_prep_vma+0x740/0xae0 [ 287.177865][ C1] __se_sys_mremap+0xa0b/0xef0 [ 287.177894][ C1] ? __pfx___se_sys_mremap+0x10/0x10 [ 287.177917][ C1] ? __pfx_ptrace_notify+0x10/0x10 [ 287.177940][ C1] ? __x64_sys_mremap+0x20/0xc0 [ 287.177960][ C1] do_syscall_64+0xfa/0x3b0 [ 287.177982][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.177995][ C1] ? __switch_to_asm+0x39/0x70 [ 287.178009][ C1] ? clear_bhb_loop+0x60/0xb0 [ 287.178026][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.178041][ C1] RIP: 0033:0x7f21406782a9 [ 287.178054][ 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 [ 287.178066][ C1] RSP: 002b:00007f2140631238 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 287.178081][ C1] RAX: ffffffffffffffda RBX: 00007f2140702308 RCX: 00007f21406782a9 [ 287.178091][ C1] RDX: 0000000000001000 RSI: 0000000000001000 RDI: 0000200000d59000 [ 287.178101][ C1] RBP: 00007f2140702300 R08: 0000200000a91000 R09: 00007f21406316c0 [ 287.178119][ C1] R10: 0000000000000007 R11: 0000000000000246 R12: 0000200000d59000 [ 287.178128][ C1] R13: 0000000000000000 R14: 00007ffe4b26f6f0 R15: 00007ffe4b26f7d8 [ 287.178145][ C1] [ 287.178153][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.012 msecs [ 287.179237][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.555275][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.566651][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 287.576708][ T31] Call Trace: [ 287.579990][ T31] [ 287.582923][ T31] dump_stack_lvl+0x99/0x250 [ 287.587523][ T31] ? __asan_memcpy+0x40/0x70 [ 287.592144][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.597521][ T31] ? __pfx__printk+0x10/0x10 [ 287.602127][ T31] vpanic+0x281/0x750 [ 287.606117][ T31] ? __pfx_vpanic+0x10/0x10 [ 287.610620][ T31] ? __x2apic_send_IPI_mask+0x1e4/0x260 [ 287.616174][ T31] ? preempt_schedule+0xae/0xc0 [ 287.621063][ T31] ? preempt_schedule_common+0x83/0xd0 [ 287.626636][ T31] panic+0xb9/0xc0 [ 287.630359][ T31] ? __pfx_panic+0x10/0x10 [ 287.634783][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.640250][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 287.646409][ T31] watchdog+0xfd2/0xfe0 [ 287.650575][ T31] ? watchdog+0x1de/0xfe0 [ 287.654922][ T31] kthread+0x70e/0x8a0 [ 287.659003][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.663679][ T31] ? __pfx_kthread+0x10/0x10 [ 287.668287][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.673493][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.678720][ T31] ? __pfx_kthread+0x10/0x10 [ 287.683406][ T31] ret_from_fork+0x3f9/0x770 [ 287.688002][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.693122][ T31] ? __switch_to_asm+0x39/0x70 [ 287.697884][ T31] ? __switch_to_asm+0x33/0x70 [ 287.702647][ T31] ? __pfx_kthread+0x10/0x10 [ 287.707242][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.712018][ T31] [ 287.715193][ T31] Kernel Offset: disabled [ 287.719514][ T31] Rebooting in 86400 seconds..