./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2660818484 <...> Warning: Permanently added '10.128.0.255' (ED25519) to the list of known hosts. execve("./syz-executor2660818484", ["./syz-executor2660818484"], 0x7ffe1bf34c70 /* 10 vars */) = 0 brk(NULL) = 0x555555e77000 brk(0x555555e77d00) = 0x555555e77d00 arch_prctl(ARCH_SET_FS, 0x555555e77380) = 0 set_tid_address(0x555555e77650) = 5065 set_robust_list(0x555555e77660, 24) = 0 rseq(0x555555e77ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2660818484", 4096) = 28 getrandom("\x07\x85\x2c\xf9\xd7\x7f\x03\x56", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555e77d00 brk(0x555555e98d00) = 0x555555e98d00 brk(0x555555e99000) = 0x555555e99000 mprotect(0x7fc2a6aae000, 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 5066 attached , child_tidptr=0x555555e77650) = 5066 [pid 5066] set_robust_list(0x555555e77660, 24) = 0 [pid 5066] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5066] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5066] setsid() = 1 [pid 5066] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5066] unshare(CLONE_NEWNS) = 0 [pid 5066] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5066] unshare(CLONE_NEWIPC) = 0 [pid 5066] unshare(CLONE_NEWCGROUP) = 0 [pid 5066] unshare(CLONE_NEWUTS) = 0 [pid 5066] unshare(CLONE_SYSVSEM) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "16777216", 8) = 8 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "536870912", 9) = 9 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "8192", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5066] close(3) = 0 [pid 5066] getpid() = 1 [pid 5066] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5066] kill(-2, SIGKILL) = 0 [pid 5066] kill(2, SIGKILL) = 0 [pid 5066] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5066] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5066] getdents64(3, 0x555555e786f0 /* 2 entries */, 32768) = 48 [pid 5066] getdents64(3, 0x555555e786f0 /* 0 entries */, 32768) = 0 [pid 5066] close(3) = 0 [ 118.258224][ T5076] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2651 jiffies s: 561 root: 0x1/. [ 118.270129][ T5076] rcu: blocking rcu_node structures (internal RCU debug): [ 118.277250][ T5076] Sending NMI from CPU 1 to CPUs 0: [ 118.282528][ C0] NMI backtrace for cpu 0 [ 118.282536][ C0] CPU: 0 PID: 5077 Comm: syz-executor266 Not tainted 6.6.0-syzkaller-14263-gaea6bf908d73 #0 [ 118.282550][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 [ 118.282557][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x60 [ 118.282597][ C0] Code: 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 48 8b 14 25 c0 bc 03 00 65 8b 05 34 20 7b 7e 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 fc 15 00 00 [ 118.282609][ C0] RSP: 0018:ffffc90000007d88 EFLAGS: 00000002 [ 118.282620][ C0] RAX: 0000000000010203 RBX: 0000000000000002 RCX: dffffc0000000000 [ 118.282628][ C0] RDX: ffff888026bd8000 RSI: 0000000000000000 RDI: 0000000000000005 [ 118.282635][ C0] RBP: ffff88801f109c00 R08: 0000000000000005 R09: 0000000000000000 [ 118.282642][ C0] R10: 0000000000000002 R11: dffffc0000000000 R12: 0000000000000000 [ 118.282650][ C0] R13: ffff88801f109c00 R14: 0000000000000002 R15: ffff888027e67800 [ 118.282661][ C0] FS: 0000555555e77380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 118.282673][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 118.282682][ C0] CR2: 0000000020000600 CR3: 000000001ecdd000 CR4: 0000000000350ef0 [ 118.282690][ C0] Call Trace: [ 118.282695][ C0] [ 118.282700][ C0] ? show_regs+0x8f/0xa0 [ 118.282716][ C0] ? nmi_cpu_backtrace+0x1d4/0x380 [ 118.282736][ C0] ? nmi_cpu_backtrace_handler+0xc/0x10 [ 118.282753][ C0] ? nmi_handle+0x1a6/0x570 [ 118.282767][ C0] ? x86_pmu_event_mapped+0x1c0/0x1c0 [ 118.282787][ C0] ? __sanitizer_cov_trace_pc+0x14/0x60 [ 118.282800][ C0] ? default_do_nmi+0x69/0x160 [ 118.282817][ C0] ? exc_nmi+0x186/0x200 [ 118.282833][ C0] ? end_repeat_nmi+0xf/0x2a [ 118.282848][ C0] ? __sanitizer_cov_trace_pc+0x14/0x60 [ 118.282861][ C0] ? __sanitizer_cov_trace_pc+0x14/0x60 [ 118.282875][ C0] ? __sanitizer_cov_trace_pc+0x14/0x60 [ 118.282895][ C0] [ 118.282898][ C0] [ 118.282901][ C0] advance_sched+0x3da/0xc60 [ 118.282925][ C0] ? taprio_dequeue+0x5e0/0x5e0 [ 118.282942][ C0] __hrtimer_run_queues+0x203/0xc10 [ 118.282964][ C0] ? enqueue_hrtimer+0x310/0x310 [ 118.282980][ C0] ? ktime_get_update_offsets_now+0x3bc/0x610 [ 118.282995][ C0] hrtimer_interrupt+0x31b/0x800 [ 118.283017][ C0] __sysvec_apic_timer_interrupt+0x105/0x3f0 [ 118.283033][ C0] sysvec_apic_timer_interrupt+0x8e/0xc0 [ 118.283053][ C0] [ 118.283056][ C0] [ 118.283060][ C0] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 118.283081][ C0] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 [ 118.283096][ C0] Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 f6 2a e4 f6 48 89 df e8 ee a9 e4 f6 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 35 f6 d5 f6 65 8b 05 46 ec 7e 75 85 c0 74 12 5b [ 118.283106][ C0] RSP: 0018:ffffc90003cff0b8 EFLAGS: 00000246 [ 118.283116][ C0] RAX: 0000000000000016 RBX: ffff88801f7372e8 RCX: 1ffffffff23ec894 [ 118.283124][ C0] RDX: 0000000000000000 RSI: ffffffff8accb920 RDI: ffffffff8b2e7fc0 [ 118.283131][ C0] RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff23e2be8 [ 118.283139][ C0] R10: ffffffff91f15f47 R11: 0000000000000002 R12: 7fffffffffffffff [ 118.283146][ C0] R13: 0000000000000002 R14: 0000000000000100 R15: 0000000000000000 [ 118.283159][ C0] taprio_change+0x28cb/0x38a0 [ 118.283181][ C0] ? taprio_dequeue+0x2d2/0x5e0 [ 118.283201][ C0] ? taprio_destroy+0x710/0x710 [ 118.283219][ C0] ? find_held_lock+0x2d/0x110 [ 118.283241][ C0] taprio_init+0x6c4/0x950 [ 118.283261][ C0] ? taprio_change+0x38a0/0x38a0 [ 118.283280][ C0] ? taprio_change+0x38a0/0x38a0 [ 118.283298][ C0] qdisc_create+0x4f7/0x10a0 [ 118.283314][ C0] ? tc_get_qdisc+0xc20/0xc20 [ 118.283330][ C0] tc_modify_qdisc+0x4de/0x1c40 [ 118.283347][ C0] ? qdisc_create+0x10a0/0x10a0 [ 118.283365][ C0] ? bpf_lsm_capable+0x9/0x10 [ 118.283383][ C0] ? qdisc_create+0x10a0/0x10a0 [ 118.283397][ C0] rtnetlink_rcv_msg+0x3c7/0xe00 [ 118.283418][ C0] ? rtnl_getlink+0xb40/0xb40 [ 118.283440][ C0] netlink_rcv_skb+0x16b/0x440 [ 118.283453][ C0] ? rtnl_getlink+0xb40/0xb40 [ 118.283472][ C0] ? netlink_ack+0x1370/0x1370 [ 118.283488][ C0] ? netlink_deliver_tap+0x1a0/0xd00 [ 118.283502][ C0] netlink_unicast+0x53b/0x810 [ 118.283516][ C0] ? netlink_attachskb+0x880/0x880 [ 118.283529][ C0] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 118.283543][ C0] ? __phys_addr_symbol+0x30/0x70 [ 118.283558][ C0] ? __check_object_size+0x323/0x730 [ 118.283580][ C0] netlink_sendmsg+0x93c/0xe40 [ 118.283594][ C0] ? netlink_unicast+0x810/0x810 [ 118.283609][ C0] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 118.283622][ C0] ? netlink_unicast+0x810/0x810 [ 118.283635][ C0] __sock_sendmsg+0xd5/0x180 [ 118.283654][ C0] ____sys_sendmsg+0x6ac/0x940 [ 118.283672][ C0] ? copy_msghdr_from_user+0x10b/0x160 [ 118.283684][ C0] ? kernel_sendmsg+0x50/0x50 [ 118.283705][ C0] ___sys_sendmsg+0x135/0x1d0 [ 118.283718][ C0] ? do_recvmmsg+0x740/0x740 [ 118.283733][ C0] ? lock_sync+0x190/0x190 [ 118.283749][ C0] ? ptrace_stop.part.0+0x4af/0x900 [ 118.283767][ C0] ? __fget_light+0x1fc/0x260 [ 118.283785][ C0] __sys_sendmsg+0x117/0x1e0 [ 118.283797][ C0] ? __sys_sendmsg_sock+0x30/0x30 [ 118.283808][ C0] ? ptrace_notify+0xf4/0x130 [ 118.283823][ C0] ? lockdep_hardirqs_on+0x7d/0x100 [ 118.283841][ C0] ? _raw_spin_unlock_irq+0x2e/0x50 [ 118.283854][ C0] ? ptrace_notify+0xf4/0x130 [ 118.283867][ C0] do_syscall_64+0x3f/0x110 [ 118.283887][ C0] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 118.283907][ C0] RIP: 0033:0x7fc2a6a36069 [ 118.283918][ 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 [ 118.283929][ C0] RSP: 002b:00007ffc6d4e60a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 118.283940][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc2a6a36069 [ 118.283948][ C0] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 118.283955][ C0] RBP: 00000000000f4240 R08: 00007ffc6d4e6130 R09: 00007ffc6d4e6130 [ 118.283963][ C0] R10: 00007ffc6d4e6130 R11: 0000000000000246 R12: 0000000000000031 [ 118.283971][ C0] R13: 0000000000000047 R14: 0000000000050012 R15: 0000000000000003 [ 118.283982][ C0] [ 118.283987][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.459 msecs