./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2690681091 <...> Warning: Permanently added '10.128.0.246' (ED25519) to the list of known hosts. execve("./syz-executor2690681091", ["./syz-executor2690681091"], 0x7ffd85e373d0 /* 10 vars */) = 0 brk(NULL) = 0x555555875000 brk(0x555555875d00) = 0x555555875d00 arch_prctl(ARCH_SET_FS, 0x555555875380) = 0 set_tid_address(0x555555875650) = 5075 set_robust_list(0x555555875660, 24) = 0 rseq(0x555555875ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2690681091", 4096) = 28 getrandom("\x4a\x55\xcb\x80\x8a\x3b\x3e\x08", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555875d00 brk(0x555555896d00) = 0x555555896d00 brk(0x555555897000) = 0x555555897000 mprotect(0x7f2287c7e000, 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5076 attached , child_tidptr=0x555555875650) = 5076 [pid 5076] set_robust_list(0x555555875660, 24) = 0 [pid 5076] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5076] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5076] setsid() = 1 [pid 5076] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5076] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5076] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5076] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5076] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5076] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5076] unshare(CLONE_NEWNS) = 0 [pid 5076] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5076] unshare(CLONE_NEWIPC) = 0 [pid 5076] unshare(CLONE_NEWCGROUP) = 0 [pid 5076] unshare(CLONE_NEWUTS) = 0 [pid 5076] unshare(CLONE_SYSVSEM) = 0 [pid 5076] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "16777216", 8) = 8 [pid 5076] close(3) = 0 [pid 5076] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "536870912", 9) = 9 [pid 5076] close(3) = 0 [pid 5076] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "1024", 4) = 4 [pid 5076] close(3) = 0 [pid 5076] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "8192", 4) = 4 [pid 5076] close(3) = 0 [pid 5076] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "1024", 4) = 4 [pid 5076] close(3) = 0 [pid 5076] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "1024", 4) = 4 [pid 5076] close(3) = 0 [pid 5076] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5076] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5076] close(3) = 0 [pid 5076] getpid() = 1 [pid 5076] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5076] kill(-2, SIGKILL) = 0 [pid 5076] kill(2, SIGKILL) = 0 [ 134.517857][ T27] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2675 jiffies s: 533 root: 0x1/. [ 134.532099][ T27] rcu: blocking rcu_node structures (internal RCU debug): [ 134.539700][ T27] Sending NMI from CPU 1 to CPUs 0: [ 134.544954][ C0] NMI backtrace for cpu 0 [ 134.544968][ C0] CPU: 0 PID: 5086 Comm: syz-executor269 Not tainted 6.8.0-rc2-syzkaller-00729-g06e6bc1b7aaf #0 [ 134.544986][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 134.544996][ C0] RIP: 0010:lock_acquire+0xdc/0x530 [ 134.545054][ C0] Code: 08 0f 83 ea 02 00 00 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 a8 69 85 8f be 08 00 00 00 e8 dc cc 84 00 48 0f a3 1d 8c 57 14 0e <73> 0d e8 7d bb 09 00 84 c0 0f 84 c1 02 00 00 48 c7 c0 cc 9c 85 8f [ 134.545068][ C0] RSP: 0018:ffffc900000078e0 EFLAGS: 00000057 [ 134.545084][ C0] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81711214 [ 134.545097][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f8569a8 [ 134.545108][ C0] RBP: ffffc90000007a28 R08: ffffffff8f8569af R09: 1ffffffff1f0ad35 [ 134.545121][ C0] R10: dffffc0000000000 R11: fffffbfff1f0ad36 R12: 1ffff92000000f24 [ 134.545135][ C0] R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88807b80f340 [ 134.545148][ C0] FS: 0000555555875380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 134.545164][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 134.545176][ C0] CR2: 00007f2287c533b0 CR3: 0000000024098000 CR4: 00000000003506f0 [ 134.545192][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 134.545202][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 134.545213][ C0] Call Trace: [ 134.545220][ C0] [ 134.545228][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 134.545255][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 134.545283][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 134.545303][ C0] ? nmi_handle+0x2a/0x580 [ 134.545330][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 134.545351][ C0] ? nmi_handle+0x14f/0x580 [ 134.545373][ C0] ? nmi_handle+0x2a/0x580 [ 134.545390][ C0] ? lock_acquire+0xdc/0x530 [ 134.545414][ C0] ? default_do_nmi+0x63/0x160 [ 134.545436][ C0] ? exc_nmi+0x121/0x210 [ 134.545457][ C0] ? end_repeat_nmi+0xf/0x60 [ 134.545482][ C0] ? lock_acquire+0xd4/0x530 [ 134.545507][ C0] ? lock_acquire+0xdc/0x530 [ 134.545531][ C0] ? lock_acquire+0xdc/0x530 [ 134.545556][ C0] ? lock_acquire+0xdc/0x530 [ 134.545580][ C0] [ 134.545585][ C0] [ 134.545594][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 134.545618][ C0] ? __lock_acquire+0x1345/0x1fd0 [ 134.545651][ C0] ? debug_objects_fill_pool+0x80/0x9b0 [ 134.545680][ C0] debug_objects_fill_pool+0x9f/0x9b0 [ 134.545704][ C0] ? debug_objects_fill_pool+0x80/0x9b0 [ 134.545729][ C0] ? __lock_acquire+0x1345/0x1fd0 [ 134.545760][ C0] ? __pfx_debug_objects_fill_pool+0x10/0x10 [ 134.545790][ C0] ? advance_sched+0xa02/0xca0 [ 134.545824][ C0] debug_object_activate+0x135/0x510 [ 134.545850][ C0] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 134.545872][ C0] ? __pfx_debug_object_activate+0x10/0x10 [ 134.545896][ C0] ? advance_sched+0xa02/0xca0 [ 134.545921][ C0] ? _raw_spin_lock_irq+0xdf/0x120 [ 134.545946][ C0] ? __pfx__raw_spin_lock_irq+0x10/0x10 [ 134.545974][ C0] enqueue_hrtimer+0x30/0x320 [ 134.545995][ C0] __hrtimer_run_queues+0x6b4/0xd00 [ 134.546024][ C0] ? __pfx___hrtimer_run_queues+0x10/0x10 [ 134.546041][ C0] ? ktime_get_update_offsets_now+0x411/0x430 [ 134.546068][ C0] hrtimer_interrupt+0x396/0x990 [ 134.546099][ C0] __sysvec_apic_timer_interrupt+0x107/0x3a0 [ 134.546124][ C0] sysvec_apic_timer_interrupt+0x92/0xb0 [ 134.546150][ C0] [ 134.546155][ C0] [ 134.546160][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 134.546180][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 [ 134.546206][ C0] Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 9e be 83 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 93 2a f2 f5 65 8b 05 04 a1 91 74 85 c0 74 43 48 c7 04 24 0e 36 [ 134.546219][ C0] RSP: 0018:ffffc90003aaeb40 EFLAGS: 00000206 [ 134.546234][ C0] RAX: 6ce9ab8b062f4e00 RBX: 1ffff92000755d6c RCX: ffffffff8171840a [ 134.546247][ C0] RDX: dffffc0000000000 RSI: ffffffff8baab560 RDI: 0000000000000001 [ 134.546258][ C0] RBP: ffffc90003aaebd0 R08: ffffffff92c8d4e7 R09: 1ffffffff2591a9c [ 134.546271][ C0] R10: dffffc0000000000 R11: fffffbfff2591a9d R12: dffffc0000000000 [ 134.546283][ C0] R13: 1ffff92000755d68 R14: ffffc90003aaeb60 R15: 0000000000000246 [ 134.546300][ C0] ? mark_lock+0x9a/0x350 [ 134.546320][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 134.546352][ C0] taprio_change+0x339b/0x42d0 [ 134.546392][ C0] ? __pfx_taprio_change+0x10/0x10 [ 134.546411][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 134.546430][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 134.546448][ C0] ? on_each_cpu_cond_mask+0x62/0x80 [ 134.546487][ C0] ? __pfx_rcu_read_lock_any_held+0x10/0x10 [ 134.546522][ C0] taprio_init+0x9da/0xc80 [ 134.546542][ C0] ? ____sys_sendmsg+0x525/0x7d0 [ 134.546564][ C0] ? __sys_sendmsg+0x2b0/0x3a0 [ 134.546586][ C0] ? do_syscall_64+0xf9/0x240 [ 134.546609][ C0] ? __pfx_taprio_init+0x10/0x10 [ 134.546631][ C0] ? lockdep_rtnl_is_held+0x26/0x40 [ 134.546650][ C0] ? qdisc_lookup+0x350/0x6b0 [ 134.546675][ C0] ? __pfx_taprio_init+0x10/0x10 [ 134.546694][ C0] qdisc_create+0x9d4/0x1190 [ 134.546716][ C0] ? __pfx_qdisc_create+0x10/0x10 [ 134.546738][ C0] tc_modify_qdisc+0xa26/0x1e40 [ 134.546764][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 134.546796][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 134.546811][ C0] rtnetlink_rcv_msg+0x885/0x1040 [ 134.546830][ C0] ? rtnetlink_rcv_msg+0x208/0x1040 [ 134.546847][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 134.546868][ C0] ? lockdep_hardirqs_on_prepare+0x43c/0x780 [ 134.546895][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 134.546923][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 134.546950][ C0] ? lockdep_hardirqs_on+0x98/0x140 [ 134.546975][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 134.547002][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 134.547025][ C0] ? __pfx___local_bh_enable_ip+0x10/0x10 [ 134.547055][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 134.547079][ C0] ? __dev_queue_xmit+0x15fd/0x3b10 [ 134.547110][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 134.547139][ C0] ? ref_tracker_free+0x643/0x7e0 [ 134.547169][ C0] netlink_rcv_skb+0x1e3/0x430 [ 134.547190][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 134.547207][ C0] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 134.547240][ C0] ? netlink_deliver_tap+0x2e/0x1b0 [ 134.547260][ C0] netlink_unicast+0x7ea/0x980 [ 134.547283][ C0] ? __pfx_netlink_unicast+0x10/0x10 [ 134.547298][ C0] ? __virt_addr_valid+0x44e/0x520 [ 134.547323][ C0] ? __phys_addr_symbol+0x2f/0x70 [ 134.547346][ C0] ? __check_object_size+0x4bb/0xa00 [ 134.547374][ C0] ? bpf_lsm_netlink_send+0x9/0x10 [ 134.547400][ C0] netlink_sendmsg+0xa3b/0xd70 [ 134.547428][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 134.547449][ C0] ? __import_iovec+0x552/0x890 [ 134.547466][ C0] ? aa_sock_msg_perm+0x91/0x160 [ 134.547485][ C0] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 134.547509][ C0] ? security_socket_sendmsg+0x87/0xb0 [ 134.547534][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 134.547552][ C0] __sock_sendmsg+0x221/0x270 [ 134.547572][ C0] ____sys_sendmsg+0x525/0x7d0 [ 134.547602][ C0] ? __pfx_____sys_sendmsg+0x10/0x10 [ 134.547629][ C0] ? do_raw_spin_lock+0x14e/0x370 [ 134.547658][ C0] __sys_sendmsg+0x2b0/0x3a0 [ 134.547683][ C0] ? __pfx___sys_sendmsg+0x10/0x10 [ 134.547714][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 134.547746][ C0] ? _raw_spin_unlock_irq+0x2e/0x50 [ 134.547770][ C0] ? ptrace_notify+0x278/0x380 [ 134.547801][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 134.547826][ C0] ? do_syscall_64+0x108/0x240 [ 134.547844][ C0] ? syscall_trace_enter+0x5e/0x150 [ 134.547872][ C0] do_syscall_64+0xf9/0x240 [ 134.547891][ C0] entry_SYSCALL_64_after_hwframe+0x6f/0x77 [ 134.547909][ C0] RIP: 0033:0x7f2287c05de9 [ 134.547924][ 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 [ 134.547938][ C0] RSP: 002b:00007ffcf4fdb5f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 134.547954][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f2287c05de9 [ 134.547966][ C0] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 134.547976][ C0] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000100000000 [ 134.547986][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf4fdb650 [ 134.547997][ C0] R13: 0000000000000001 R14: 00007ffcf4fdb650 R15: 0000000000000003 [ 134.548017][ C0] [ 134.548025][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 3.070 msecs