./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3722793399 <...> Warning: Permanently added '10.128.1.10' (ED25519) to the list of known hosts. execve("./syz-executor3722793399", ["./syz-executor3722793399"], 0x7ffc64145ec0 /* 10 vars */) = 0 brk(NULL) = 0x555556f02000 brk(0x555556f02d00) = 0x555556f02d00 arch_prctl(ARCH_SET_FS, 0x555556f02380) = 0 set_tid_address(0x555556f02650) = 358 set_robust_list(0x555556f02660, 24) = 0 rseq(0x555556f02ca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3722793399", 4096) = 28 getrandom("\x67\xe7\xb3\x7b\xe6\x6e\x0f\x5f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556f02d00 brk(0x555556f23d00) = 0x555556f23d00 brk(0x555556f24000) = 0x555556f24000 mprotect(0x7f5c86ff4000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556f02650) = 359 ./strace-static-x86_64: Process 359 attached [pid 359] set_robust_list(0x555556f02660, 24) = 0 [pid 359] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 359] setpgid(0, 0) = 0 [pid 359] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 359] write(3, "1000", 4) = 4 [pid 359] close(3) = 0 [pid 359] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 25.625110][ T23] audit: type=1400 audit(1713628236.290:66): avc: denied { execmem } for pid=358 comm="syz-executor372" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 25.649512][ T23] audit: type=1400 audit(1713628236.320:67): avc: denied { read } for pid=359 comm="syz-executor372" name="kvm" dev="devtmpfs" ino=104 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 25.654082][ T359] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. [ 25.672618][ T23] audit: type=1400 audit(1713628236.320:68): avc: denied { open } for pid=359 comm="syz-executor372" path="/dev/kvm" dev="devtmpfs" ino=104 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 359] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 359] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=8192, userspace_addr=0x20000000}) = 0 [pid 359] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 25.711553][ T23] audit: type=1400 audit(1713628236.320:69): avc: denied { ioctl } for pid=359 comm="syz-executor372" path="/dev/kvm" dev="devtmpfs" ino=104 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 25.754133][ T359] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 25.761738][ T359] #PF: supervisor instruction fetch in kernel mode [ 25.768071][ T359] #PF: error_code(0x0010) - not-present page [ 25.773886][ T359] PGD 1e00de067 P4D 1e00de067 PUD 1e00df067 PMD 0 [ 25.780487][ T359] Oops: 0010 [#1] PREEMPT SMP KASAN [ 25.785522][ T359] CPU: 1 PID: 359 Comm: syz-executor372 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 25.795500][ T359] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 25.805409][ T359] RIP: 0010:0x86 [ 25.808781][ T359] Code: Bad RIP value. [ 25.812684][ T359] RSP: 0018:ffff8881dc21f308 EFLAGS: 00010086 [ 25.818587][ T359] RAX: ffff8881dc21f338 RBX: dffffc0000000000 RCX: ffff8881e1365e80 [ 25.826397][ T359] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 25.834208][ T359] RBP: 0000000000000ec0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 25.842108][ T359] R10: ffff8881e1365e80 R11: 0000000000000002 R12: ffffffff84601550 [ 25.849921][ T359] R13: fffffe0000000ec8 R14: ffff8881dc2f8000 R15: fffffe0000000ecb [ 25.857853][ T359] FS: 0000555556f02380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 25.866608][ T359] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.873033][ T359] CR2: 000000000000005c CR3: 00000001e2d19000 CR4: 00000000003426a0 [ 25.880846][ T359] Call Trace: [ 25.883981][ T359] ? __die+0xb4/0x100 [ 25.887797][ T359] ? no_context+0xbda/0xe50 [ 25.892135][ T359] ? is_prefetch+0x4b0/0x4b0 [ 25.896556][ T359] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 25.901936][ T359] ? __do_page_fault+0xa7d/0xbb0 [ 25.906710][ T359] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 25.912288][ T359] ? __bad_area_nosemaphore+0xc0/0x460 [ 25.917565][ T359] ? page_fault+0x2f/0x40 [ 25.921730][ T359] ? __entry_text_end+0x4/0x4 [ 25.926239][ T359] ? vmx_handle_exit_irqoff+0x45/0x220 [ 25.931537][ T359] ? check_preemption_disabled+0x91/0x320 [ 25.937093][ T359] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 25.943340][ T359] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 25.949587][ T359] ? __entry_text_end+0x4/0x4 [ 25.954098][ T359] ? vcpu_enter_guest+0x2d06/0x9f70 [ 25.959134][ T359] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 25.964428][ T359] ? _raw_spin_lock+0x1b0/0x1b0 [ 25.969113][ T359] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 25.974407][ T359] ? check_preemption_disabled+0x9f/0x320 [ 25.979981][ T359] ? _raw_spin_lock+0x1b0/0x1b0 [ 25.984647][ T359] ? check_preemption_disabled+0x9f/0x320 [ 25.990205][ T359] ? debug_smp_processor_id+0x20/0x20 [ 25.995413][ T359] ? local_bh_enable+0x20/0x20 [ 26.000016][ T359] ? update_group_capacity+0x69c/0xa40 [ 26.005480][ T359] ? find_next_and_bit+0x156/0x190 [ 26.010429][ T359] ? cpumask_next_and+0x11/0x30 [ 26.015114][ T359] ? load_balance+0x43e1/0x7a40 [ 26.019808][ T359] ? check_preemption_disabled+0x9f/0x320 [ 26.025357][ T359] ? update_load_avg+0x40f/0x1210 [ 26.030215][ T359] ? cpuacct_charge+0xe2/0x170 [ 26.034819][ T359] ? enqueue_task_fair+0xaac/0x1e40 [ 26.039852][ T359] ? check_preempt_wakeup+0x41a/0x9f0 [ 26.045060][ T359] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 26.050093][ T359] ? check_preemption_disabled+0x9f/0x320 [ 26.055647][ T359] ? try_to_wake_up+0x7c5/0x14f0 [ 26.060421][ T359] ? debug_smp_processor_id+0x20/0x20 [ 26.065627][ T359] ? check_preemption_disabled+0x9f/0x320 [ 26.071187][ T359] ? __local_bh_enable_ip+0x70/0x70 [ 26.076221][ T359] ? local_bh_enable+0x5/0x20 [ 26.080733][ T359] ? kvm_check_async_pf_completion+0x335/0x350 [ 26.086723][ T359] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 26.092278][ T359] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 26.096962][ T359] ? create_vcpu_fd+0x120/0x120 [ 26.101646][ T359] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 26.106595][ T359] ? _raw_spin_lock_irqsave+0x210/0x210 [ 26.112010][ T359] ? cgroup_update_frozen+0x157/0xab0 [ 26.117187][ T359] ? cgroup_update_frozen+0x157/0xab0 [ 26.122395][ T359] ? cgroup_leave_frozen+0x13c/0x290 [ 26.127517][ T359] ? ptrace_stop+0x6ee/0xa30 [ 26.131945][ T359] ? create_vcpu_fd+0x120/0x120 [ 26.136635][ T359] ? do_vfs_ioctl+0x742/0x1720 [ 26.141227][ T359] ? ioctl_preallocate+0x250/0x250 [ 26.146175][ T359] ? check_preemption_disabled+0x153/0x320 [ 26.151814][ T359] ? syscall_trace_enter+0x650/0x940 [ 26.156935][ T359] ? do_syscall_64+0x1c0/0x1c0 [ 26.161537][ T359] ? switch_fpu_return+0x1d4/0x410 [ 26.166646][ T359] ? security_file_ioctl+0x7d/0xa0 [ 26.171592][ T359] ? __x64_sys_ioctl+0xd4/0x110 [ 26.176270][ T359] ? do_syscall_64+0xca/0x1c0 [ 26.180788][ T359] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 26.186688][ T359] Modules linked in: [ 26.190428][ T359] CR2: 0000000000000086 [ 26.194414][ T359] ---[ end trace bb2e97675f5700e5 ]--- [ 26.199709][ T359] RIP: 0010:0x86 [ 26.203090][ T359] Code: Bad RIP value. [ 26.206989][ T359] RSP: 0018:ffff8881dc21f308 EFLAGS: 00010086 [ 26.212897][ T359] RAX: ffff8881dc21f338 RBX: dffffc0000000000 RCX: ffff8881e1365e80 [ 26.220708][ T359] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 26.228520][ T359] RBP: 0000000000000ec0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 26.236326][ T359] R10: ffff8881e1365e80 R11: 0000000000000002 R12: ffffffff84601550 [ 26.244141][ T359] R13: fffffe0000000ec8 R14: ffff8881dc2f8000 R15: fffffe0000000ecb [ 26.251969][ T359] FS: 0000555556f02380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 26.260715][ T359] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.267138][ T359] CR2: 000000000000005c CR3: 00000001e2d19000 CR4: 00000000003426a0 [ 26.274954][ T359] Kernel panic - not syncing: Fatal exception [ 26.281143][ T359] Kernel Offset: disabled [ 26.285264][ T359] Rebooting in 86400 seconds..