./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4174838995 <...> Warning: Permanently added '10.128.0.251' (ED25519) to the list of known hosts. execve("./syz-executor4174838995", ["./syz-executor4174838995"], 0x7ffe762d2e50 /* 10 vars */) = 0 brk(NULL) = 0x555570b53000 brk(0x555570b53d40) = 0x555570b53d40 arch_prctl(ARCH_SET_FS, 0x555570b533c0) = 0 set_tid_address(0x555570b53690) = 5848 set_robust_list(0x555570b536a0, 24) = 0 rseq(0x555570b53ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4174838995", 4096) = 28 getrandom("\xc2\x96\x02\x61\x97\x9d\x89\x2e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555570b53d40 brk(0x555570b74d40) = 0x555570b74d40 brk(0x555570b75000) = 0x555570b75000 mprotect(0x7fee83e3c000, 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, child_tidptr=0x555570b53690) = 5849 ./strace-static-x86_64: Process 5849 attached [pid 5849] set_robust_list(0x555570b536a0, 24) = 0 [pid 5849] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5849] setpgid(0, 0) = 0 [pid 5849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "1000", 4) = 4 [pid 5849] close(3) = 0 [pid 5849] write(1, "executing program\n", 18executing program ) = 18 [pid 5849] futex(0x7fee83e4230c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5849] rt_sigaction(SIGRT_1, {sa_handler=0x7fee83dde1e0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fee83dcf860}, NULL, 8) = 0 [pid 5849] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fee83d51000 [pid 5849] mprotect(0x7fee83d52000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5849] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5849] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fee83d71990, parent_tid=0x7fee83d71990, exit_signal=0, stack=0x7fee83d51000, stack_size=0x20300, tls=0x7fee83d716c0}./strace-static-x86_64: Process 5850 attached => {parent_tid=[5850]}, 88) = 5850 [pid 5850] rseq(0x7fee83d71fe0, 0x20, 0, 0x53053053) = 0 [pid 5849] rt_sigprocmask(SIG_SETMASK, [], [pid 5850] set_robust_list(0x7fee83d719a0, 24 [pid 5849] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5849] futex(0x7fee83e42308, FUTEX_WAKE_PRIVATE, 1000000 [pid 5850] <... set_robust_list resumed>) = 0 [pid 5849] <... futex resumed>) = 0 [pid 5850] rt_sigprocmask(SIG_SETMASK, [], [pid 5849] futex(0x7fee83e4230c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5850] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5850] mremap(0x200000006000, 12288, 12288, MREMAP_MAYMOVE|MREMAP_FIXED|MREMAP_DONTUNMAP, 0x200000ffd000 [pid 5849] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5849] exit_group(0) = ? [ 92.057361][ T24] cfg80211: failed to load regulatory.db [pid 5848] kill(-5849, SIGKILL) = 0 [pid 5848] kill(5849, SIGKILL) = 0 [pid 5848] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5848] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5848] getdents64(3, 0x555570b54730 /* 2 entries */, 32768) = 48 [pid 5848] getdents64(3, 0x555570b54730 /* 0 entries */, 32768) = 0 [pid 5848] close(3) = 0 [ 286.616430][ T31] INFO: task syz-executor417:5849 blocked for more than 143 seconds. [ 286.624631][ T31] Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 [ 286.631885][ T31] Blocked by coredump. [ 286.636981][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.646050][ T31] task:syz-executor417 state:D stack:26920 pid:5849 tgid:5849 ppid:5848 task_flags:0x40004c flags:0x00004002 [ 286.658441][ T31] Call Trace: [ 286.661780][ T31] [ 286.664741][ T31] __schedule+0x1737/0x4d30 [ 286.670235][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.675629][ T31] ? schedule+0x165/0x360 [ 286.680002][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.684898][ T31] ? __pfx___schedule+0x10/0x10 [ 286.690864][ T31] ? schedule+0x91/0x360 [ 286.695493][ T31] schedule+0x165/0x360 [ 286.699701][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.705674][ T31] rwsem_down_read_slowpath+0x5fd/0x8f0 [ 286.711255][ T31] ? rwsem_down_read_slowpath+0x4b8/0x8f0 [ 286.717482][ T31] ? __pfx_rwsem_down_read_slowpath+0x10/0x10 [ 286.723593][ T31] ? exit_mm+0xcc/0x2c0 [ 286.728269][ T31] ? __pfx_mm_release+0x10/0x10 [ 286.733166][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.738898][ T31] down_read+0x98/0x2e0 [ 286.743097][ T31] exit_mm+0xcc/0x2c0 [ 286.747612][ T31] ? __pfx_exit_mm+0x10/0x10 [ 286.752250][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.758035][ T31] do_exit+0x648/0x2300 [ 286.762260][ T31] ? __pfx_do_exit+0x10/0x10 [ 286.767364][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.772607][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.778306][ T31] do_group_exit+0x21c/0x2d0 [ 286.782945][ T31] __x64_sys_exit_group+0x3f/0x40 [ 286.788499][ T31] x64_sys_call+0x21f7/0x2200 [ 286.793295][ T31] do_syscall_64+0xfa/0x3b0 [ 286.798355][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.803615][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.810431][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.815476][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.821419][ T31] RIP: 0033:0x7fee83db6309 [ 286.826356][ T31] RSP: 002b:00007ffc881a4a28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 286.834813][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fee83db6309 [ 286.843295][ T31] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 286.851742][ T31] RBP: 00007fee83e422b0 R08: ffffffffffffffb0 R09: 7fffffffffffffff [ 286.860214][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fee83e422b0 [ 286.869237][ T31] R13: 0000000000000000 R14: 00007fee83e42e40 R15: 00007fee83d84120 [ 286.877725][ T31] [ 286.880843][ T31] [ 286.880843][ T31] Showing all locks held in the system: [ 286.889101][ T31] 1 lock held by khungtaskd/31: [ 286.894154][ T31] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.904595][ T31] 2 locks held by getty/5607: [ 286.909630][ T31] #0: ffff88814d3ba0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.920086][ T31] #1: ffffc9000332e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.930577][ T31] 1 lock held by syz-executor417/5849: [ 286.936470][ T31] #0: ffff88807e3e01e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mm+0xcc/0x2c0 [ 286.945671][ T31] 1 lock held by syz-executor417/5850: [ 286.951237][ T31] [ 286.953591][ T31] ============================================= [ 286.953591][ T31] [ 286.962673][ T31] NMI backtrace for cpu 1 [ 286.962700][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 286.962724][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 286.962736][ T31] Call Trace: [ 286.962744][ T31] [ 286.962753][ T31] dump_stack_lvl+0x189/0x250 [ 286.962790][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.962819][ T31] ? __pfx__printk+0x10/0x10 [ 286.962861][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.962890][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.962917][ T31] ? __pfx__printk+0x10/0x10 [ 286.962949][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.962975][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.963003][ T31] watchdog+0xf93/0xfe0 [ 286.963030][ T31] ? watchdog+0x1de/0xfe0 [ 286.963056][ T31] kthread+0x70e/0x8a0 [ 286.963089][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.963109][ T31] ? __pfx_kthread+0x10/0x10 [ 286.963140][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.963167][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.963192][ T31] ? __pfx_kthread+0x10/0x10 [ 286.963222][ T31] ret_from_fork+0x3f9/0x770 [ 286.963248][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 286.963274][ T31] ? __switch_to_asm+0x39/0x70 [ 286.963289][ T31] ? __switch_to_asm+0x33/0x70 [ 286.963306][ T31] ? __pfx_kthread+0x10/0x10 [ 286.963336][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.963371][ T31] [ 286.963378][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.111403][ C0] NMI backtrace for cpu 0 [ 287.111421][ C0] CPU: 0 UID: 0 PID: 5850 Comm: syz-executor417 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.111442][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.111452][ C0] RIP: 0010:mt_validate+0xbf3/0x4380 [ 287.111484][ C0] Code: 28 00 74 08 4c 89 ff e8 5b 27 ab f6 4d 8b 2f 31 ff 4c 89 ee e8 1e dc 47 f6 4d 85 ed 41 0f 95 c7 31 ff 48 89 de e8 0d dc 47 f6 <48> 85 db 0f 94 c0 44 08 f8 3c 01 0f 85 9e 00 00 00 e8 17 d7 47 f6 [ 287.111502][ C0] RSP: 0018:ffffc900040b7280 EFLAGS: 00000293 [ 287.111518][ C0] RAX: ffffffff8b7829e3 RBX: 0000000000000007 RCX: ffff888032bb5a00 [ 287.111530][ C0] RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000000 [ 287.111540][ C0] RBP: ffffc900040b7450 R08: ffff888032bb5a00 R09: 0000000000000004 [ 287.111551][ C0] R10: 0000000000000003 R11: 0000000000000000 R12: ffff888070c55240 [ 287.111562][ C0] R13: 00001fea4613cfff R14: 00001fea46139fff R15: ffff888070c55201 [ 287.111574][ C0] FS: 00007fee83d716c0(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 [ 287.111589][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.111600][ C0] CR2: 000055ec53ae3168 CR3: 00000000722c2000 CR4: 00000000003526f0 [ 287.111615][ C0] Call Trace: [ 287.111624][ C0] [ 287.111639][ C0] ? __pfx_mt_validate+0x10/0x10 [ 287.111664][ C0] ? __kasan_slab_alloc+0x6c/0x80 [ 287.111683][ C0] ? kmem_cache_alloc_bulk_noprof+0x4fd/0x790 [ 287.111706][ C0] ? kmem_cache_alloc_bulk_noprof+0xfa/0x790 [ 287.111736][ C0] validate_mm+0xb6/0x4b0 [ 287.111763][ C0] ? __pfx_validate_mm+0x10/0x10 [ 287.111796][ C0] vma_link+0x366/0x450 [ 287.111822][ C0] ? __pfx_vma_link+0x10/0x10 [ 287.111850][ C0] ? anon_vma_clone+0x49b/0x4f0 [ 287.111869][ C0] ? anon_vma_name+0x87/0xf0 [ 287.111886][ C0] ? vm_area_dup+0x4f5/0x680 [ 287.111909][ C0] copy_vma+0x70c/0x940 [ 287.111938][ C0] ? __pfx_copy_vma+0x10/0x10 [ 287.111965][ C0] ? __pfx_move_page_tables+0x10/0x10 [ 287.112003][ C0] move_vma+0x81f/0x1840 [ 287.112027][ C0] ? __lock_acquire+0xab9/0xd20 [ 287.112066][ C0] ? arch_get_unmapped_area_topdown+0x251/0xbc0 [ 287.112089][ C0] ? __pfx_move_vma+0x10/0x10 [ 287.112114][ C0] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 287.112142][ C0] ? cap_mmap_addr+0xb0/0x100 [ 287.112163][ C0] ? bpf_lsm_mmap_addr+0x9/0x20 [ 287.112179][ C0] ? security_mmap_addr+0x71/0x270 [ 287.112203][ C0] mremap_to+0x6d6/0x7a0 [ 287.112230][ C0] ? __pfx_mremap_to+0x10/0x10 [ 287.112257][ C0] ? check_prep_vma+0x740/0xae0 [ 287.112285][ C0] __se_sys_mremap+0xa0b/0xef0 [ 287.112319][ C0] ? __pfx___se_sys_mremap+0x10/0x10 [ 287.112346][ C0] ? __pfx_ptrace_notify+0x10/0x10 [ 287.112372][ C0] ? __x64_sys_mremap+0x20/0xc0 [ 287.112396][ C0] do_syscall_64+0xfa/0x3b0 [ 287.112421][ C0] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.112436][ C0] ? __switch_to_asm+0x39/0x70 [ 287.112450][ C0] ? clear_bhb_loop+0x60/0xb0 [ 287.112468][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.112484][ C0] RIP: 0033:0x7fee83db82a9 [ 287.112504][ 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 [ 287.112516][ C0] RSP: 002b:00007fee83d71238 EFLAGS: 00000246 ORIG_RAX: 0000000000000019 [ 287.112532][ C0] RAX: ffffffffffffffda RBX: 00007fee83e42308 RCX: 00007fee83db82a9 [ 287.112543][ C0] RDX: 0000000000003000 RSI: 0000000000003000 RDI: 0000200000006000 [ 287.112553][ C0] RBP: 00007fee83e42300 R08: 0000200000ffd000 R09: 00007fee83d716c0 [ 287.112564][ C0] R10: 0000000000000007 R11: 0000000000000246 R12: 0000200000006000 [ 287.112574][ C0] R13: 0000000000000000 R14: 00007ffc881a48c0 R15: 00007ffc881a49a8 [ 287.112593][ C0] [ 287.112601][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.199 msecs [ 287.113472][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.500361][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) [ 287.511661][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.521728][ T31] Call Trace: [ 287.525018][ T31] [ 287.527959][ T31] dump_stack_lvl+0x99/0x250 [ 287.532572][ T31] ? __asan_memcpy+0x40/0x70 [ 287.537181][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.542397][ T31] ? __pfx__printk+0x10/0x10 [ 287.547011][ T31] vpanic+0x281/0x750 [ 287.551003][ T31] ? __pfx_vpanic+0x10/0x10 [ 287.555515][ T31] ? __x2apic_send_IPI_mask+0x1e4/0x260 [ 287.561163][ T31] ? preempt_schedule+0xae/0xc0 [ 287.566032][ T31] ? preempt_schedule_common+0x83/0xd0 [ 287.571509][ T31] panic+0xb9/0xc0 [ 287.575244][ T31] ? __pfx_panic+0x10/0x10 [ 287.579674][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.585058][ T31] ? nmi_trigger_cpumask_backtrace+0x2bb/0x300 [ 287.591231][ T31] watchdog+0xfd2/0xfe0 [ 287.595398][ T31] ? watchdog+0x1de/0xfe0 [ 287.599738][ T31] kthread+0x70e/0x8a0 [ 287.603820][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.608502][ T31] ? __pfx_kthread+0x10/0x10 [ 287.613132][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.618351][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.623564][ T31] ? __pfx_kthread+0x10/0x10 [ 287.628180][ T31] ret_from_fork+0x3f9/0x770 [ 287.632790][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.637917][ T31] ? __switch_to_asm+0x39/0x70 [ 287.642681][ T31] ? __switch_to_asm+0x33/0x70 [ 287.647449][ T31] ? __pfx_kthread+0x10/0x10 [ 287.652053][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.656830][ T31] [ 287.660222][ T31] Kernel Offset: disabled [ 287.664552][ T31] Rebooting in 86400 seconds..