./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3935271632 <...> Warning: Permanently added '10.128.1.152' (ED25519) to the list of known hosts. execve("./syz-executor3935271632", ["./syz-executor3935271632"], 0x7fffb6ec8ad0 /* 10 vars */) = 0 brk(NULL) = 0x555556f43000 brk(0x555556f43d00) = 0x555556f43d00 arch_prctl(ARCH_SET_FS, 0x555556f43380) = 0 set_tid_address(0x555556f43650) = 5068 set_robust_list(0x555556f43660, 24) = 0 rseq(0x555556f43ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3935271632", 4096) = 28 getrandom("\x6f\x0b\x4f\x0f\xb7\xfd\x71\xaf", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556f43d00 brk(0x555556f64d00) = 0x555556f64d00 brk(0x555556f65000) = 0x555556f65000 mprotect(0x7f111845c000, 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 5069 attached , child_tidptr=0x555556f43650) = 5069 [pid 5069] set_robust_list(0x555556f43660, 24) = 0 [pid 5069] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5069] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5069] setsid() = 1 [pid 5069] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5069] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5069] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5069] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5069] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5069] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5069] unshare(CLONE_NEWNS) = 0 [pid 5069] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5069] unshare(CLONE_NEWIPC) = 0 [pid 5069] unshare(CLONE_NEWCGROUP) = 0 [pid 5069] unshare(CLONE_NEWUTS) = 0 [pid 5069] unshare(CLONE_SYSVSEM) = 0 [pid 5069] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "16777216", 8) = 8 [pid 5069] close(3) = 0 [pid 5069] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "536870912", 9) = 9 [pid 5069] close(3) = 0 [pid 5069] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "1024", 4) = 4 [pid 5069] close(3) = 0 [pid 5069] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "8192", 4) = 4 [pid 5069] close(3) = 0 [pid 5069] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "1024", 4) = 4 [pid 5069] close(3) = 0 [pid 5069] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "1024", 4) = 4 [pid 5069] close(3) = 0 [pid 5069] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5069] close(3) = 0 [pid 5069] getpid() = 1 [pid 5069] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5069] kill(-2, SIGKILL) = 0 [pid 5069] kill(2, SIGKILL) = 0 [ 117.694698][ T1786] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2675 jiffies s: 545 root: 0x1/. [ 117.711057][ T1786] rcu: blocking rcu_node structures (internal RCU debug): [ 117.733558][ T1786] Sending NMI from CPU 1 to CPUs 0: [ 117.738788][ C0] NMI backtrace for cpu 0 [ 117.738799][ C0] CPU: 0 PID: 5078 Comm: syz-executor393 Not tainted 6.8.0-rc2-syzkaller-00682-gffabe98cb576 #0 [ 117.738815][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 117.738823][ C0] RIP: 0010:debug_deactivate+0x9e/0x200 [ 117.738861][ C0] Code: de e8 a6 6b 11 00 31 ff 89 de e8 9d 6b 11 00 40 84 ed 74 10 e8 e3 ce f8 ff 84 c0 74 20 e8 8a 68 11 00 eb 05 e8 83 68 11 00 5b <41> 5e 5d c3 cc cc cc cc e8 75 68 11 00 90 0f 0b 90 eb 91 e8 6a 68 [ 117.738873][ C0] RSP: 0018:ffffc90000007d48 EFLAGS: 00000046 [ 117.738885][ C0] RAX: ffffffff8181fec6 RBX: ffff8880b942bac8 RCX: ffff88806b7d5940 [ 117.738897][ C0] RDX: 0000000080010203 RSI: ffffffff8bfe7200 RDI: ffffffff8bfe71c0 [ 117.738907][ C0] RBP: 0000000000000001 R08: ffffffff8181feb3 R09: 1ffffffff1f0acdd [ 117.738917][ C0] R10: dffffc0000000000 R11: fffffbfff1f0acde R12: 1ffff1101728575b [ 117.738928][ C0] R13: dffffc0000000000 R14: ffff8880793e1340 R15: ffff8880b942ba80 [ 117.738939][ C0] FS: 0000555556f43380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 117.738952][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 117.738962][ C0] CR2: 00007f11184600f0 CR3: 000000002831c000 CR4: 00000000003506f0 [ 117.738979][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 117.738987][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 117.738996][ C0] Call Trace: [ 117.739002][ C0] [ 117.739008][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 117.739029][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 117.739049][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 117.739065][ C0] ? nmi_handle+0x2a/0x580 [ 117.739086][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 117.739102][ C0] ? nmi_handle+0x14f/0x580 [ 117.739115][ C0] ? nmi_handle+0x2a/0x580 [ 117.739129][ C0] ? debug_deactivate+0x9e/0x200 [ 117.739143][ C0] ? default_do_nmi+0x63/0x160 [ 117.739160][ C0] ? exc_nmi+0x121/0x210 [ 117.739176][ C0] ? end_repeat_nmi+0xf/0x60 [ 117.739195][ C0] ? debug_deactivate+0x83/0x200 [ 117.739209][ C0] ? debug_deactivate+0x96/0x200 [ 117.739224][ C0] ? debug_deactivate+0x9e/0x200 [ 117.739239][ C0] ? debug_deactivate+0x9e/0x200 [ 117.739255][ C0] ? debug_deactivate+0x9e/0x200 [ 117.739270][ C0] [ 117.739274][ C0] [ 117.739279][ C0] __hrtimer_run_queues+0x30f/0xd00 [ 117.739303][ C0] ? __pfx___hrtimer_run_queues+0x10/0x10 [ 117.739317][ C0] ? ktime_get_update_offsets_now+0x411/0x430 [ 117.739339][ C0] hrtimer_interrupt+0x396/0x990 [ 117.739365][ C0] __sysvec_apic_timer_interrupt+0x107/0x3a0 [ 117.739385][ C0] sysvec_apic_timer_interrupt+0x92/0xb0 [ 117.739404][ C0] [ 117.739408][ C0] [ 117.739413][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 117.739428][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 [ 117.739449][ C0] Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 9e de 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 4a f2 f5 65 8b 05 04 c1 91 74 85 c0 74 43 48 c7 04 24 0e 36 [ 117.739460][ C0] RSP: 0018:ffffc90003b6eb40 EFLAGS: 00000206 [ 117.739472][ C0] RAX: d28ffd99f2352a00 RBX: 1ffff9200076dd6c RCX: ffffffff8171840a [ 117.739483][ C0] RDX: dffffc0000000000 RSI: ffffffff8baab560 RDI: 0000000000000001 [ 117.739493][ C0] RBP: ffffc90003b6ebd0 R08: ffffffff92c8d4e7 R09: 1ffffffff2591a9c [ 117.739503][ C0] R10: dffffc0000000000 R11: fffffbfff2591a9d R12: dffffc0000000000 [ 117.739513][ C0] R13: 1ffff9200076dd68 R14: ffffc90003b6eb60 R15: 0000000000000246 [ 117.739527][ C0] ? mark_lock+0x9a/0x350 [ 117.739544][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 117.739569][ C0] taprio_change+0x339b/0x42d0 [ 117.739599][ C0] ? __pfx_taprio_change+0x10/0x10 [ 117.739614][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 117.739630][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 117.739645][ C0] ? on_each_cpu_cond_mask+0x62/0x80 [ 117.739676][ C0] ? __pfx_rcu_read_lock_any_held+0x10/0x10 [ 117.739704][ C0] taprio_init+0x9da/0xc80 [ 117.739719][ C0] ? ____sys_sendmsg+0x525/0x7d0 [ 117.739737][ C0] ? __sys_sendmsg+0x2b0/0x3a0 [ 117.739753][ C0] ? do_syscall_64+0xf9/0x240 [ 117.739773][ C0] ? __pfx_taprio_init+0x10/0x10 [ 117.739790][ C0] ? lockdep_rtnl_is_held+0x26/0x40 [ 117.739805][ C0] ? qdisc_lookup+0x350/0x6b0 [ 117.739824][ C0] ? __pfx_taprio_init+0x10/0x10 [ 117.739839][ C0] qdisc_create+0x9d4/0x1190 [ 117.739858][ C0] ? __pfx_qdisc_create+0x10/0x10 [ 117.739876][ C0] tc_modify_qdisc+0xa26/0x1e40 [ 117.739905][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 117.739938][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 117.739957][ C0] rtnetlink_rcv_msg+0x885/0x1040 [ 117.739984][ C0] ? rtnetlink_rcv_msg+0x208/0x1040 [ 117.740005][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 117.740028][ C0] ? lockdep_hardirqs_on_prepare+0x43c/0x780 [ 117.740049][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 117.740071][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 117.740090][ C0] ? lockdep_hardirqs_on+0x98/0x140 [ 117.740110][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 117.740130][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 117.740148][ C0] ? __pfx___local_bh_enable_ip+0x10/0x10 [ 117.740170][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 117.740189][ C0] ? __dev_queue_xmit+0x15fd/0x3b10 [ 117.740212][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 117.740235][ C0] ? ref_tracker_free+0x643/0x7e0 [ 117.740258][ C0] netlink_rcv_skb+0x1e3/0x430 [ 117.740275][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 117.740296][ C0] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 117.740322][ C0] ? netlink_deliver_tap+0x2e/0x1b0 [ 117.740339][ C0] netlink_unicast+0x7ea/0x980 [ 117.740358][ C0] ? __pfx_netlink_unicast+0x10/0x10 [ 117.740370][ C0] ? __virt_addr_valid+0x44e/0x520 [ 117.740389][ C0] ? __phys_addr_symbol+0x2f/0x70 [ 117.740406][ C0] ? __check_object_size+0x4bb/0xa00 [ 117.740424][ C0] ? bpf_lsm_netlink_send+0x9/0x10 [ 117.740444][ C0] netlink_sendmsg+0xa3b/0xd70 [ 117.740467][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 117.740484][ C0] ? __import_iovec+0x552/0x890 [ 117.740498][ C0] ? aa_sock_msg_perm+0x91/0x160 [ 117.740514][ C0] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 117.740532][ C0] ? security_socket_sendmsg+0x87/0xb0 [ 117.740552][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 117.740567][ C0] __sock_sendmsg+0x221/0x270 [ 117.740584][ C0] ____sys_sendmsg+0x525/0x7d0 [ 117.740606][ C0] ? __pfx_____sys_sendmsg+0x10/0x10 [ 117.740626][ C0] ? do_raw_spin_lock+0x14e/0x370 [ 117.740648][ C0] __sys_sendmsg+0x2b0/0x3a0 [ 117.740667][ C0] ? __pfx___sys_sendmsg+0x10/0x10 [ 117.740691][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 117.740717][ C0] ? _raw_spin_unlock_irq+0x2e/0x50 [ 117.740735][ C0] ? ptrace_notify+0x278/0x380 [ 117.740759][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 117.740779][ C0] ? do_syscall_64+0x108/0x240 [ 117.740794][ C0] ? syscall_trace_enter+0x5e/0x150 [ 117.740815][ C0] do_syscall_64+0xf9/0x240 [ 117.740831][ C0] entry_SYSCALL_64_after_hwframe+0x6f/0x77 [ 117.740845][ C0] RIP: 0033:0x7f11183e3ba9 [ 117.740857][ 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 [ 117.740868][ C0] RSP: 002b:00007fffc0997868 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 117.740882][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f11183e3ba9 [ 117.740891][ C0] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 117.740900][ C0] RBP: 0000000000000000 R08: 0000000100000000 R09: 0000000100000000 [ 117.740909][ C0] R10: 0000000100000000 R11: 0000000000000246 R12: 00007fffc09978c0 [ 117.740919][ C0] R13: 0000000000000001 R14: 00007fffc09978c0 R15: 0000000000000003 [ 117.740936][ C0] [ 117.740942][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.153 msecs