./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1687447520 <...> Warning: Permanently added '10.128.0.55' (ED25519) to the list of known hosts. execve("./syz-executor1687447520", ["./syz-executor1687447520"], 0x7fff4bccabb0 /* 10 vars */) = 0 brk(NULL) = 0x55557ceaa000 brk(0x55557ceaad00) = 0x55557ceaad00 arch_prctl(ARCH_SET_FS, 0x55557ceaa380) = 0 set_tid_address(0x55557ceaa650) = 5066 set_robust_list(0x55557ceaa660, 24) = 0 rseq(0x55557ceaaca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1687447520", 4096) = 28 getrandom("\xe3\x71\xea\xcd\x17\xc1\xc2\xaf", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557ceaad00 brk(0x55557cecbd00) = 0x55557cecbd00 brk(0x55557cecc000) = 0x55557cecc000 mprotect(0x7fb5ed6f0000, 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, child_tidptr=0x55557ceaa650) = 5067 ./strace-static-x86_64: Process 5067 attached [pid 5067] set_robust_list(0x55557ceaa660, 24) = 0 [pid 5067] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5067] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5067] setsid() = 1 [pid 5067] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5067] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5067] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5067] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5067] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5067] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5067] unshare(CLONE_NEWNS) = 0 [pid 5067] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5067] unshare(CLONE_NEWIPC) = 0 [pid 5067] unshare(CLONE_NEWCGROUP) = 0 [pid 5067] unshare(CLONE_NEWUTS) = 0 [pid 5067] unshare(CLONE_SYSVSEM) = 0 [pid 5067] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "16777216", 8) = 8 [pid 5067] close(3) = 0 [pid 5067] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "536870912", 9) = 9 [pid 5067] close(3) = 0 [pid 5067] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "1024", 4) = 4 [pid 5067] close(3) = 0 [pid 5067] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "8192", 4) = 4 [pid 5067] close(3) = 0 [pid 5067] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "1024", 4) = 4 [pid 5067] close(3) = 0 [pid 5067] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "1024", 4) = 4 [pid 5067] close(3) = 0 [pid 5067] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5067] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5067] close(3) = 0 [pid 5067] getpid() = 1 [pid 5067] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5067] kill(-2, SIGKILL) = 0 [pid 5067] kill(2, SIGKILL) = 0 [ 124.408297][ T18] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2686 jiffies s: 545 root: 0x1/. [ 124.422384][ T18] rcu: blocking rcu_node structures (internal RCU debug): [ 124.429880][ T18] Sending NMI from CPU 1 to CPUs 0: [ 124.435114][ C0] NMI backtrace for cpu 0 [ 124.435126][ C0] CPU: 0 PID: 5078 Comm: syz-executor168 Not tainted 6.8.0-syzkaller-08073-g480e035fc4c7 #0 [ 124.435142][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 124.435151][ C0] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x8/0x90 [ 124.435201][ C0] Code: cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 4c 8b 04 24 <65> 48 8b 14 25 80 d0 03 00 65 8b 05 20 d8 6e 7e a9 00 01 ff 00 74 [ 124.435212][ C0] RSP: 0018:ffffc90000007d58 EFLAGS: 00000046 [ 124.435226][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 [ 124.435237][ C0] RDX: 0000000000010202 RSI: 0000000000000000 RDI: 0000000000000000 [ 124.435246][ C0] RBP: ffffc90000007ea8 R08: ffffffff81828269 R09: 1ffffffff1f0e59d [ 124.435257][ C0] R10: dffffc0000000000 R11: fffffbfff1f0e59e R12: 1ffff11017285943 [ 124.435268][ C0] R13: ffffffff89817840 R14: ffff8880240f7340 R15: 0000000000000001 [ 124.435285][ C0] FS: 000055557ceaa380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 124.435298][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 124.435309][ C0] CR2: 00007fb5ed6c53b0 CR3: 000000002b246000 CR4: 00000000003506f0 [ 124.435322][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 124.435331][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 124.435341][ C0] Call Trace: [ 124.435347][ C0] [ 124.435354][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 124.435374][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 124.435391][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 124.435406][ C0] ? nmi_handle+0x2a/0x580 [ 124.435429][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 124.435446][ C0] ? nmi_handle+0x14f/0x580 [ 124.435461][ C0] ? nmi_handle+0x2a/0x580 [ 124.435476][ C0] ? __sanitizer_cov_trace_const_cmp1+0x8/0x90 [ 124.435496][ C0] ? default_do_nmi+0x63/0x160 [ 124.435511][ C0] ? exc_nmi+0x123/0x1f0 [ 124.435526][ C0] ? end_repeat_nmi+0xf/0x53 [ 124.435542][ C0] ? __pfx_advance_sched+0x10/0x10 [ 124.435567][ C0] ? __hrtimer_run_queues+0x539/0xd00 [ 124.435587][ C0] ? __sanitizer_cov_trace_const_cmp1+0x8/0x90 [ 124.435607][ C0] ? __sanitizer_cov_trace_const_cmp1+0x8/0x90 [ 124.435628][ C0] ? __sanitizer_cov_trace_const_cmp1+0x8/0x90 [ 124.435648][ C0] [ 124.435653][ C0] [ 124.435658][ C0] __hrtimer_run_queues+0x539/0xd00 [ 124.435685][ C0] ? __pfx___hrtimer_run_queues+0x10/0x10 [ 124.435702][ C0] ? ktime_get_update_offsets_now+0x411/0x430 [ 124.435721][ C0] hrtimer_interrupt+0x396/0x990 [ 124.435751][ C0] __sysvec_apic_timer_interrupt+0x107/0x3a0 [ 124.435774][ C0] sysvec_apic_timer_interrupt+0xa1/0xc0 [ 124.435793][ C0] [ 124.435797][ C0] [ 124.435803][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 124.435819][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 [ 124.435839][ C0] Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 fe 49 79 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 a3 f1 e5 f5 65 8b 05 f4 d5 84 74 85 c0 74 43 48 c7 04 24 0e 36 [ 124.435849][ C0] RSP: 0018:ffffc90003a6eb40 EFLAGS: 00000206 [ 124.435862][ C0] RAX: 19dfa34643926a00 RBX: 1ffff9200074dd6c RCX: ffffffff81720c2a [ 124.435873][ C0] RDX: dffffc0000000000 RSI: ffffffff8baac1e0 RDI: 0000000000000001 [ 124.435883][ C0] RBP: ffffc90003a6ebd0 R08: ffffffff92ce15c7 R09: 1ffffffff259c2b8 [ 124.435894][ C0] R10: dffffc0000000000 R11: fffffbfff259c2b9 R12: dffffc0000000000 [ 124.435905][ C0] R13: 1ffff9200074dd68 R14: ffffc90003a6eb60 R15: 0000000000000246 [ 124.435920][ C0] ? mark_lock+0x9a/0x350 [ 124.435939][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 124.435963][ C0] taprio_change+0x339b/0x42d0 [ 124.435992][ C0] ? __pfx_taprio_change+0x10/0x10 [ 124.436009][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 124.436026][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 124.436042][ C0] ? on_each_cpu_cond_mask+0x62/0x80 [ 124.436074][ C0] ? __pfx_rcu_read_lock_any_held+0x10/0x10 [ 124.436098][ C0] taprio_init+0x9da/0xc80 [ 124.436116][ C0] ? ____sys_sendmsg+0x525/0x7d0 [ 124.436135][ C0] ? __sys_sendmsg+0x2b0/0x3a0 [ 124.436152][ C0] ? do_syscall_64+0xfb/0x240 [ 124.436178][ C0] ? __pfx_taprio_init+0x10/0x10 [ 124.436198][ C0] ? lockdep_rtnl_is_held+0x26/0x40 [ 124.436214][ C0] ? qdisc_lookup+0x350/0x6b0 [ 124.436230][ C0] ? __pfx_taprio_init+0x10/0x10 [ 124.436248][ C0] qdisc_create+0x9d4/0x1190 [ 124.436269][ C0] ? __pfx_qdisc_create+0x10/0x10 [ 124.436296][ C0] tc_modify_qdisc+0xa26/0x1e40 [ 124.436320][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 124.436350][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 124.436366][ C0] rtnetlink_rcv_msg+0x89b/0x10d0 [ 124.436383][ C0] ? rtnetlink_rcv_msg+0x208/0x10d0 [ 124.436398][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 124.436413][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 124.436432][ C0] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 124.436448][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 124.436465][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 124.436480][ C0] ? lockdep_hardirqs_on+0x99/0x150 [ 124.436498][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 124.436512][ C0] ? dev_hard_start_xmit+0x724/0x790 [ 124.436530][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 124.436549][ C0] ? __pfx___local_bh_enable_ip+0x10/0x10 [ 124.436566][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 124.436586][ C0] ? __dev_queue_xmit+0x15fd/0x3b10 [ 124.436610][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 124.436634][ C0] ? ref_tracker_free+0x643/0x7e0 [ 124.436657][ C0] netlink_rcv_skb+0x1e3/0x430 [ 124.436677][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 124.436693][ C0] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 124.436722][ C0] ? netlink_deliver_tap+0x2e/0x1b0 [ 124.436742][ C0] netlink_unicast+0x7ea/0x980 [ 124.436763][ C0] ? __pfx_netlink_unicast+0x10/0x10 [ 124.436870][ C0] ? __virt_addr_valid+0x44e/0x520 [ 124.436907][ C0] ? __phys_addr_symbol+0x2f/0x70 [ 124.436926][ C0] ? __check_object_size+0x4bc/0xa00 [ 124.436942][ C0] ? bpf_lsm_netlink_send+0x9/0x10 [ 124.436960][ C0] netlink_sendmsg+0x8e1/0xcb0 [ 124.436988][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 124.437009][ C0] ? __import_iovec+0x536/0x820 [ 124.437024][ C0] ? aa_sock_msg_perm+0x91/0x160 [ 124.437046][ C0] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 124.437061][ C0] ? security_socket_sendmsg+0x87/0xb0 [ 124.437081][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 124.437099][ C0] __sock_sendmsg+0x221/0x270 [ 124.437118][ C0] ____sys_sendmsg+0x525/0x7d0 [ 124.437142][ C0] ? __pfx_____sys_sendmsg+0x10/0x10 [ 124.437164][ C0] ? do_raw_spin_lock+0x14f/0x370 [ 124.437189][ C0] __sys_sendmsg+0x2b0/0x3a0 [ 124.437219][ C0] ? __pfx___sys_sendmsg+0x10/0x10 [ 124.437246][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 124.437269][ C0] ? _raw_spin_unlock_irq+0x2e/0x50 [ 124.437289][ C0] ? ptrace_notify+0x279/0x380 [ 124.437317][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 124.437334][ C0] ? do_syscall_64+0x10a/0x240 [ 124.437357][ C0] ? syscall_trace_enter+0x5f/0x150 [ 124.437377][ C0] do_syscall_64+0xfb/0x240 [ 124.437400][ C0] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 124.437418][ C0] RIP: 0033:0x7fb5ed6783e9 [ 124.437435][ 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 [ 124.437447][ C0] RSP: 002b:00007fff103f29e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 124.437465][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fb5ed6783e9 [ 124.437477][ C0] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 124.437488][ C0] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000100000000 [ 124.437498][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff103f2a40 [ 124.437509][ C0] R13: 0000000000000001 R14: 00007fff103f2a40 R15: 0000000000000003 [ 124.437525][ C0] [ 124.437533][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.419 msecs