./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor569905852 <...> Warning: Permanently added '10.128.0.149' (ED25519) to the list of known hosts. execve("./syz-executor569905852", ["./syz-executor569905852"], 0x7ffec5ef5db0 /* 10 vars */) = 0 brk(NULL) = 0x5555556a5000 brk(0x5555556a5e00) = 0x5555556a5e00 arch_prctl(ARCH_SET_FS, 0x5555556a5480) = 0 set_tid_address(0x5555556a5750) = 5069 set_robust_list(0x5555556a5760, 24) = 0 rseq(0x5555556a5da0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor569905852", 4096) = 27 getrandom("\x09\x01\x0e\x1c\xd7\x33\x49\xde", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555556a5e00 brk(0x5555556c6e00) = 0x5555556c6e00 brk(0x5555556c7000) = 0x5555556c7000 mprotect(0x7ff02da9e000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7ff02d9efd20, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7ff02d9fb470}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7ff02d9efd20, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7ff02d9fb470}, NULL, 8) = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5070 attached , child_tidptr=0x5555556a5750) = 5070 [pid 5070] set_robust_list(0x5555556a5760, 24) = 0 [pid 5070] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5070] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5070] setsid() = 1 [pid 5070] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5070] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5070] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5070] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5070] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5070] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5070] unshare(CLONE_NEWNS) = 0 [pid 5070] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5070] unshare(CLONE_NEWIPC) = 0 [pid 5070] unshare(CLONE_NEWCGROUP) = 0 [pid 5070] unshare(CLONE_NEWUTS) = 0 [pid 5070] unshare(CLONE_SYSVSEM) = 0 [pid 5070] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5070] write(3, "16777216", 8) = 8 [pid 5070] close(3) = 0 [pid 5070] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5070] write(3, "536870912", 9) = 9 [pid 5070] close(3) = 0 [pid 5070] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5070] write(3, "1024", 4) = 4 [pid 5070] close(3) = 0 [pid 5070] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5070] write(3, "8192", 4) = 4 [pid 5070] close(3) = 0 [pid 5070] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5070] write(3, "1024", 4) = 4 [pid 5070] close(3) = 0 [pid 5070] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5070] write(3, "1024", 4) = 4 [pid 5070] close(3) = 0 [pid 5070] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5070] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5070] close(3) = 0 [pid 5070] getpid() = 1 [pid 5070] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5070] kill(-2, SIGKILL) = 0 [pid 5070] kill(2, SIGKILL) = 0 [pid 5070] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5070] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5070] getdents64(3, 0x5555556a67f0 /* 2 entries */, 32768) = 48 [pid 5070] getdents64(3, 0x5555556a67f0 /* 0 entries */, 32768) = 0 [pid 5070] close(3) = 0 [ 147.883806][ T4539] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2686 jiffies s: 545 root: 0x1/. [ 147.897610][ T4539] rcu: blocking rcu_node structures (internal RCU debug): [ 147.911686][ T4539] Sending NMI from CPU 1 to CPUs 0: [ 147.917489][ C0] NMI backtrace for cpu 0 [ 147.917502][ C0] CPU: 0 PID: 5080 Comm: syz-executor569 Not tainted 6.8.0-rc3-syzkaller-00184-g5b3fbd61b9d1 #0 [ 147.917520][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 147.917529][ C0] RIP: 0010:__lock_acquire+0xc4a/0x1fd0 [ 147.917580][ C0] Code: 00 00 00 fc ff df 0f b6 04 38 84 c0 0f 85 aa 0c 00 00 83 3d d7 ef d6 12 00 75 39 48 63 9c 24 88 00 00 00 48 89 d8 48 c1 e8 06 <48> 8d 3c c5 20 94 c8 92 be 08 00 00 00 e8 e4 60 84 00 48 bf 00 00 [ 147.917593][ C0] RSP: 0018:ffffc900000077f0 EFLAGS: 00000046 [ 147.917608][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff94481303 [ 147.917619][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000 [ 147.917629][ C0] RBP: ffff88802b12c6b8 R08: ffffffff92c89427 R09: 1ffffffff2591284 [ 147.917641][ C0] R10: dffffc0000000000 R11: fffffbfff2591285 R12: 0000000000000001 [ 147.917652][ C0] R13: ffff88802b12bb80 R14: 1ffff110056258db R15: ffff88802b12c6d8 [ 147.917664][ C0] FS: 00005555556a5480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 147.917678][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 147.917689][ C0] CR2: 00007ff02da24523 CR3: 000000001f572000 CR4: 00000000003506f0 [ 147.917703][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 147.917712][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 147.917722][ C0] Call Trace: [ 147.917728][ C0] [ 147.917734][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 147.917754][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 147.917775][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 147.917797][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 147.917814][ C0] ? nmi_handle+0x14f/0x580 [ 147.917829][ C0] ? nmi_handle+0x2a/0x580 [ 147.917844][ C0] ? __lock_acquire+0xc4a/0x1fd0 [ 147.917863][ C0] ? default_do_nmi+0x63/0x160 [ 147.917878][ C0] ? exc_nmi+0x121/0x210 [ 147.917892][ C0] ? end_repeat_nmi+0xf/0x60 [ 147.917918][ C0] ? __lock_acquire+0xc4a/0x1fd0 [ 147.917937][ C0] ? __lock_acquire+0xc4a/0x1fd0 [ 147.917958][ C0] ? __lock_acquire+0xc4a/0x1fd0 [ 147.917977][ C0] [ 147.917982][ C0] [ 147.917993][ C0] lock_acquire+0x1e3/0x530 [ 147.918012][ C0] ? debug_objects_fill_pool+0x80/0x9b0 [ 147.918034][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 147.918053][ C0] ? __lock_acquire+0x1345/0x1fd0 [ 147.918078][ C0] ? debug_objects_fill_pool+0x80/0x9b0 [ 147.918097][ C0] debug_objects_fill_pool+0x9f/0x9b0 [ 147.918114][ C0] ? debug_objects_fill_pool+0x80/0x9b0 [ 147.918133][ C0] ? __lock_acquire+0x1345/0x1fd0 [ 147.918156][ C0] ? __pfx_debug_objects_fill_pool+0x10/0x10 [ 147.918177][ C0] ? advance_sched+0xa02/0xca0 [ 147.918202][ C0] debug_object_activate+0x135/0x510 [ 147.918221][ C0] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 147.918240][ C0] ? __pfx_debug_object_activate+0x10/0x10 [ 147.918257][ C0] ? advance_sched+0xa02/0xca0 [ 147.918274][ C0] ? _raw_spin_lock_irq+0xdf/0x120 [ 147.918292][ C0] ? __pfx__raw_spin_lock_irq+0x10/0x10 [ 147.918311][ C0] enqueue_hrtimer+0x30/0x320 [ 147.918329][ C0] __hrtimer_run_queues+0x6b4/0xd00 [ 147.918352][ C0] ? __pfx___hrtimer_run_queues+0x10/0x10 [ 147.918367][ C0] ? ktime_get_update_offsets_now+0x411/0x430 [ 147.918389][ C0] hrtimer_interrupt+0x396/0x990 [ 147.918413][ C0] __sysvec_apic_timer_interrupt+0x107/0x3a0 [ 147.918438][ C0] sysvec_apic_timer_interrupt+0x92/0xb0 [ 147.918457][ C0] [ 147.918461][ C0] [ 147.918466][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 147.918487][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 [ 147.918505][ C0] Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 ce 74 84 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 a3 3a f3 f5 65 8b 05 34 b1 92 74 85 c0 74 43 48 c7 04 24 0e 36 [ 147.918517][ C0] RSP: 0018:ffffc90003b56a60 EFLAGS: 00000206 [ 147.918530][ C0] RAX: ed615f539629c200 RBX: 1ffff9200076ad50 RCX: ffffffff817183ea [ 147.918542][ C0] RDX: dffffc0000000000 RSI: ffffffff8baab5e0 RDI: 0000000000000001 [ 147.918553][ C0] RBP: ffffc90003b56af0 R08: ffffffff92c894e7 R09: 1ffffffff259129c [ 147.918564][ C0] R10: dffffc0000000000 R11: fffffbfff259129d R12: dffffc0000000000 [ 147.918576][ C0] R13: 1ffff9200076ad4c R14: ffffc90003b56a80 R15: 0000000000000246 [ 147.918590][ C0] ? mark_lock+0x9a/0x350 [ 147.918608][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 147.918630][ C0] taprio_change+0x4912/0x57d0 [ 147.918655][ C0] ? __pfx_taprio_change+0x10/0x10 [ 147.918672][ C0] ? __pfx___might_resched+0x10/0x10 [ 147.918689][ C0] ? static_key_slow_inc_cpuslocked+0xdd/0x150 [ 147.918708][ C0] ? __pfx_lock_release+0x10/0x10 [ 147.918727][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 147.918743][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 147.918759][ C0] ? on_each_cpu_cond_mask+0x62/0x80 [ 147.918795][ C0] taprio_init+0x9da/0xc80 [ 147.918808][ C0] ? ____sys_sendmsg+0x525/0x7d0 [ 147.918825][ C0] ? __sys_sendmsg+0x2b0/0x3a0 [ 147.918840][ C0] ? do_syscall_64+0xf9/0x240 [ 147.918865][ C0] ? __pfx_taprio_init+0x10/0x10 [ 147.918881][ C0] ? lockdep_rtnl_is_held+0x26/0x40 [ 147.918901][ C0] ? qdisc_lookup+0x350/0x6b0 [ 147.918919][ C0] ? __pfx_taprio_init+0x10/0x10 [ 147.918933][ C0] qdisc_create+0x9d4/0x1190 [ 147.918955][ C0] ? __pfx_qdisc_create+0x10/0x10 [ 147.918977][ C0] tc_modify_qdisc+0xa26/0x1e40 [ 147.919002][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 147.919031][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 147.919049][ C0] rtnetlink_rcv_msg+0x885/0x1040 [ 147.919070][ C0] ? rtnetlink_rcv_msg+0x208/0x1040 [ 147.919089][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 147.919111][ C0] ? lockdep_hardirqs_on_prepare+0x43c/0x780 [ 147.919132][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 147.919153][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 147.919174][ C0] ? lockdep_hardirqs_on+0x98/0x140 [ 147.919192][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 147.919212][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 147.919229][ C0] ? __pfx___local_bh_enable_ip+0x10/0x10 [ 147.919252][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 147.919269][ C0] ? __dev_queue_xmit+0x15fd/0x3b10 [ 147.919290][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 147.919310][ C0] ? ref_tracker_free+0x643/0x7e0 [ 147.919331][ C0] netlink_rcv_skb+0x1e3/0x430 [ 147.919352][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 147.919371][ C0] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 147.919400][ C0] ? netlink_deliver_tap+0x2e/0x1b0 [ 147.919421][ C0] netlink_unicast+0x7ea/0x980 [ 147.919449][ C0] ? __pfx_netlink_unicast+0x10/0x10 [ 147.919472][ C0] ? __virt_addr_valid+0x44e/0x520 [ 147.919492][ C0] ? __phys_addr_symbol+0x2f/0x70 [ 147.919511][ C0] ? __check_object_size+0x4bb/0xa00 [ 147.919528][ C0] ? bpf_lsm_netlink_send+0x9/0x10 [ 147.919547][ C0] netlink_sendmsg+0xa3b/0xd70 [ 147.919566][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 147.919581][ C0] ? __import_iovec+0x552/0x890 [ 147.919601][ C0] ? aa_sock_msg_perm+0x91/0x160 [ 147.919623][ C0] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 147.919642][ C0] ? security_socket_sendmsg+0x87/0xb0 [ 147.919661][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 147.919674][ C0] __sock_sendmsg+0x221/0x270 [ 147.919697][ C0] ____sys_sendmsg+0x525/0x7d0 [ 147.919717][ C0] ? __pfx_____sys_sendmsg+0x10/0x10 [ 147.919735][ C0] ? do_raw_spin_lock+0x14e/0x370 [ 147.919757][ C0] __sys_sendmsg+0x2b0/0x3a0 [ 147.919774][ C0] ? __pfx___sys_sendmsg+0x10/0x10 [ 147.919797][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 147.919823][ C0] ? _raw_spin_unlock_irq+0x2e/0x50 [ 147.919840][ C0] ? ptrace_notify+0x278/0x380 [ 147.919864][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 147.919885][ C0] ? do_syscall_64+0x108/0x240 [ 147.919904][ C0] ? syscall_trace_enter+0x5e/0x150 [ 147.919926][ C0] do_syscall_64+0xf9/0x240 [ 147.919947][ C0] entry_SYSCALL_64_after_hwframe+0x6f/0x77 [ 147.919967][ C0] RIP: 0033:0x7ff02da26529 [ 147.919981][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 19 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 b8 ff ff ff f7 d8 64 89 01 48 [ 147.919993][ C0] RSP: 002b:00007ffee947a828 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 147.920008][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff02da26529 [ 147.920019][ C0] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 147.920029][ C0] RBP: 00000000000f4240 R08: 0000000000000000 R09: 00007ffee947a890 [ 147.920039][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffee947a890 [ 147.920049][ C0] R13: 0000000000000001 R14: 00007ffee947a890 R15: 0000000000000003 [ 147.920066][ C0] [ 147.920073][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.583 msecs