./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3319116811 <...> Warning: Permanently added '10.128.0.195' (ED25519) to the list of known hosts. execve("./syz-executor3319116811", ["./syz-executor3319116811"], 0x7ffd0d20b6e0 /* 10 vars */) = 0 brk(NULL) = 0x555555e50000 brk(0x555555e50d00) = 0x555555e50d00 arch_prctl(ARCH_SET_FS, 0x555555e50380) = 0 set_tid_address(0x555555e50650) = 5071 set_robust_list(0x555555e50660, 24) = 0 rseq(0x555555e50ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3319116811", 4096) = 28 getrandom("\xb1\x0b\x92\xfe\x63\xe5\xc3\xd1", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555e50d00 brk(0x555555e71d00) = 0x555555e71d00 brk(0x555555e72000) = 0x555555e72000 mprotect(0x7ff162efa000, 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 5072 attached , child_tidptr=0x555555e50650) = 5072 [pid 5072] set_robust_list(0x555555e50660, 24) = 0 [pid 5072] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5072] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5072] setsid() = 1 [pid 5072] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5072] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5072] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5072] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5072] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5072] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5072] unshare(CLONE_NEWNS) = 0 [pid 5072] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5072] unshare(CLONE_NEWIPC) = 0 [pid 5072] unshare(CLONE_NEWCGROUP) = 0 [pid 5072] unshare(CLONE_NEWUTS) = 0 [pid 5072] unshare(CLONE_SYSVSEM) = 0 [pid 5072] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "16777216", 8) = 8 [pid 5072] close(3) = 0 [pid 5072] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "536870912", 9) = 9 [pid 5072] close(3) = 0 [pid 5072] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "1024", 4) = 4 [pid 5072] close(3) = 0 [pid 5072] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "8192", 4) = 4 [pid 5072] close(3) = 0 [pid 5072] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "1024", 4) = 4 [pid 5072] close(3) = 0 [pid 5072] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "1024", 4) = 4 [pid 5072] close(3) = 0 [pid 5072] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5072] close(3) = 0 [pid 5072] getpid() = 1 [pid 5072] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5072] kill(-2, SIGKILL) = 0 [pid 5072] kill(2, SIGKILL) = 0 [ 133.820461][ T5082] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2630 jiffies s: 557 root: 0x1/. [ 133.836593][ T5082] rcu: blocking rcu_node structures (internal RCU debug): [ 133.844086][ T5082] Sending NMI from CPU 1 to CPUs 0: [ 133.849324][ C0] NMI backtrace for cpu 0 [ 133.849335][ C0] CPU: 0 PID: 5083 Comm: syz-executor331 Not tainted 6.8.0-rc5-syzkaller-00163-gffd2cb6b718e #0 [ 133.849353][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 133.849363][ C0] RIP: 0010:__lock_acquire+0x48b/0x1fd0 [ 133.849423][ C0] Code: 04 30 84 c0 0f 85 13 13 00 00 44 8b a4 24 e0 00 00 00 48 8b 44 24 10 44 89 38 49 89 c7 4c 8b 74 24 28 4b 8d 5c f0 24 48 89 d8 <48> c1 e8 03 0f b6 04 30 84 c0 0f 85 14 13 00 00 44 89 23 44 89 eb [ 133.849437][ C0] RSP: 0018:ffffc90000007a30 EFLAGS: 00000046 [ 133.849451][ C0] RAX: ffff888074fbc6b4 RBX: ffff888074fbc6b4 RCX: 0000000000040000 [ 133.849464][ C0] RDX: 0000000000080000 RSI: dffffc0000000000 RDI: 00000000000046f8 [ 133.849475][ C0] RBP: 000000000000000a R08: ffff888074fbc640 R09: 0000000000000001 [ 133.849485][ C0] R10: dffffc0000000000 R11: fffffbfff1f0acd6 R12: 0000000000000000 [ 133.849497][ C0] R13: 00000000000006f8 R14: 000000000000000a R15: ffff888074fbc6b0 [ 133.849508][ C0] FS: 0000555555e50380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 [ 133.849522][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 133.849534][ C0] CR2: 0000000020000600 CR3: 000000002e3d4000 CR4: 00000000003506f0 [ 133.849547][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 133.849557][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 133.849567][ C0] Call Trace: [ 133.849573][ C0] [ 133.849579][ C0] ? nmi_cpu_backtrace+0x3c2/0x4d0 [ 133.849603][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 133.849629][ C0] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 133.849654][ C0] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 133.849675][ C0] ? nmi_handle+0x14f/0x580 [ 133.849690][ C0] ? nmi_handle+0x2a/0x580 [ 133.849706][ C0] ? __lock_acquire+0x48b/0x1fd0 [ 133.849731][ C0] ? default_do_nmi+0x63/0x160 [ 133.849749][ C0] ? exc_nmi+0x121/0x210 [ 133.849765][ C0] ? end_repeat_nmi+0xf/0x60 [ 133.849786][ C0] ? __lock_acquire+0x48b/0x1fd0 [ 133.849811][ C0] ? __lock_acquire+0x48b/0x1fd0 [ 133.849836][ C0] ? __lock_acquire+0x48b/0x1fd0 [ 133.849861][ C0] [ 133.849865][ C0] [ 133.849879][ C0] lock_acquire+0x1e3/0x530 [ 133.849903][ C0] ? advance_sched+0xab/0xca0 [ 133.849929][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 133.849954][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 133.849978][ C0] ? __hrtimer_run_queues+0x481/0xd00 [ 133.849996][ C0] ? __pfx_lock_release+0x10/0x10 [ 133.850024][ C0] ? __pfx_advance_sched+0x10/0x10 [ 133.850045][ C0] _raw_spin_lock+0x2e/0x40 [ 133.850067][ C0] ? advance_sched+0xab/0xca0 [ 133.850084][ C0] advance_sched+0xab/0xca0 [ 133.850103][ C0] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 133.850126][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 133.850152][ C0] ? __pfx_advance_sched+0x10/0x10 [ 133.850170][ C0] __hrtimer_run_queues+0x594/0xd00 [ 133.850196][ C0] ? __pfx___hrtimer_run_queues+0x10/0x10 [ 133.850218][ C0] ? ktime_get_update_offsets_now+0x411/0x430 [ 133.850245][ C0] hrtimer_interrupt+0x396/0x990 [ 133.850273][ C0] __sysvec_apic_timer_interrupt+0x107/0x3a0 [ 133.850297][ C0] sysvec_apic_timer_interrupt+0x92/0xb0 [ 133.850320][ C0] [ 133.850324][ C0] [ 133.850330][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 133.850356][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 [ 133.850379][ C0] Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 0e ec 83 f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 13 ad f2 f5 65 8b 05 94 1e 92 74 85 c0 74 43 48 c7 04 24 0e 36 [ 133.850392][ C0] RSP: 0018:ffffc900040f6a60 EFLAGS: 00000206 [ 133.850406][ C0] RAX: edc1f28c14ac2d00 RBX: 1ffff9200081ed50 RCX: ffffffff8171893a [ 133.850419][ C0] RDX: dffffc0000000000 RSI: ffffffff8baab660 RDI: 0000000000000001 [ 133.850430][ C0] RBP: ffffc900040f6af0 R08: ffffffff92c8c4e7 R09: 1ffffffff259189c [ 133.850443][ C0] R10: dffffc0000000000 R11: fffffbfff259189d R12: dffffc0000000000 [ 133.850455][ C0] R13: 1ffff9200081ed4c R14: ffffc900040f6a80 R15: 0000000000000246 [ 133.850470][ C0] ? mark_lock+0x9a/0x350 [ 133.850489][ C0] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 133.850517][ C0] taprio_change+0x4912/0x57d0 [ 133.850545][ C0] ? __pfx_taprio_change+0x10/0x10 [ 133.850564][ C0] ? __pfx___might_resched+0x10/0x10 [ 133.850582][ C0] ? static_key_slow_inc_cpuslocked+0xdd/0x150 [ 133.850604][ C0] ? __pfx_lock_release+0x10/0x10 [ 133.850627][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 133.850646][ C0] ? __pfx_do_sync_core+0x10/0x10 [ 133.850663][ C0] ? on_each_cpu_cond_mask+0x62/0x80 [ 133.850706][ C0] taprio_init+0x9da/0xc80 [ 133.850722][ C0] ? ____sys_sendmsg+0x525/0x7d0 [ 133.850741][ C0] ? __sys_sendmsg+0x2b0/0x3a0 [ 133.850759][ C0] ? do_syscall_64+0xf9/0x240 [ 133.850789][ C0] ? __pfx_taprio_init+0x10/0x10 [ 133.850807][ C0] ? lockdep_rtnl_is_held+0x26/0x40 [ 133.850822][ C0] ? qdisc_lookup+0x350/0x6b0 [ 133.850842][ C0] ? __pfx_taprio_init+0x10/0x10 [ 133.850858][ C0] qdisc_create+0x9d4/0x1190 [ 133.850887][ C0] ? __pfx_qdisc_create+0x10/0x10 [ 133.850915][ C0] tc_modify_qdisc+0xa26/0x1e40 [ 133.850946][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 133.850981][ C0] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 133.851004][ C0] rtnetlink_rcv_msg+0x885/0x1040 [ 133.851030][ C0] ? rtnetlink_rcv_msg+0x208/0x1040 [ 133.851055][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 133.851082][ C0] ? lockdep_hardirqs_on_prepare+0x43c/0x780 [ 133.851108][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 133.851135][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 133.851162][ C0] ? lockdep_hardirqs_on+0x98/0x140 [ 133.851184][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 133.851216][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 133.851235][ C0] ? __pfx___local_bh_enable_ip+0x10/0x10 [ 133.851265][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 133.851285][ C0] ? __dev_queue_xmit+0x15fd/0x3b10 [ 133.851310][ C0] ? __dev_queue_xmit+0x2c4/0x3b10 [ 133.851335][ C0] ? ref_tracker_free+0x643/0x7e0 [ 133.851361][ C0] netlink_rcv_skb+0x1e3/0x430 [ 133.851388][ C0] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 133.851413][ C0] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 133.851449][ C0] ? netlink_deliver_tap+0x2e/0x1b0 [ 133.851477][ C0] netlink_unicast+0x7ea/0x980 [ 133.851505][ C0] ? __pfx_netlink_unicast+0x10/0x10 [ 133.851527][ C0] ? __virt_addr_valid+0x44e/0x520 [ 133.851552][ C0] ? __phys_addr_symbol+0x2f/0x70 [ 133.851575][ C0] ? __check_object_size+0x4bb/0xa00 [ 133.851595][ C0] ? bpf_lsm_netlink_send+0x9/0x10 [ 133.851617][ C0] netlink_sendmsg+0xa3b/0xd70 [ 133.851639][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 133.851656][ C0] ? __import_iovec+0x552/0x890 [ 133.851681][ C0] ? aa_sock_msg_perm+0x91/0x160 [ 133.851707][ C0] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 133.851730][ C0] ? security_socket_sendmsg+0x87/0xb0 [ 133.851752][ C0] ? __pfx_netlink_sendmsg+0x10/0x10 [ 133.851767][ C0] __sock_sendmsg+0x221/0x270 [ 133.851793][ C0] ____sys_sendmsg+0x525/0x7d0 [ 133.851818][ C0] ? __pfx_____sys_sendmsg+0x10/0x10 [ 133.851839][ C0] ? do_raw_spin_lock+0x14e/0x370 [ 133.851865][ C0] __sys_sendmsg+0x2b0/0x3a0 [ 133.851886][ C0] ? __pfx___sys_sendmsg+0x10/0x10 [ 133.851912][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 133.851943][ C0] ? _raw_spin_unlock_irq+0x2e/0x50 [ 133.851963][ C0] ? ptrace_notify+0x278/0x380 [ 133.851993][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 133.852018][ C0] ? do_syscall_64+0x108/0x240 [ 133.852043][ C0] ? syscall_trace_enter+0x5e/0x150 [ 133.852070][ C0] do_syscall_64+0xf9/0x240 [ 133.852095][ C0] entry_SYSCALL_64_after_hwframe+0x6f/0x77 [ 133.852120][ C0] RIP: 0033:0x7ff162e81de9 [ 133.852134][ 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 [ 133.852147][ C0] RSP: 002b:00007ffdaf496c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 133.852164][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff162e81de9 [ 133.852175][ C0] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 133.852185][ C0] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000100000000 [ 133.852195][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdaf496cc0 [ 133.852206][ C0] R13: 0000000000000001 R14: 00007ffdaf496cc0 R15: 0000000000000003 [ 133.852230][ C0] [ 133.852237][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.913 msecs