./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor946162269 <...> Warning: Permanently added '10.128.0.77' (ED25519) to the list of known hosts. execve("./syz-executor946162269", ["./syz-executor946162269"], 0x7ffc67dba7b0 /* 10 vars */) = 0 brk(NULL) = 0x55556efcd000 brk(0x55556efcde00) = 0x55556efcde00 arch_prctl(ARCH_SET_FS, 0x55556efcd480) = 0 set_tid_address(0x55556efcd750) = 358 set_robust_list(0x55556efcd760, 24) = 0 rseq(0x55556efcdda0, 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-executor946162269", 4096) = 27 getrandom("\x63\x41\x6a\xdb\xba\xa8\xc3\xcd", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556efcde00 brk(0x55556efeee00) = 0x55556efeee00 brk(0x55556efef000) = 0x55556efef000 mprotect(0x7f2fa9f49000, 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 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7f2fa9ea6a10, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f2fa9eadbd0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f2fa9ea6a10, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f2fa9eadbd0}, NULL, 8) = 0 write(1, "executing program\n", 18executing program ) = 18 openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 24.770345][ T23] audit: type=1400 audit(1738042010.949:66): avc: denied { execmem } for pid=358 comm="syz-executor946" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.781375][ T358] 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. ioctl(3, KVM_CREATE_VM, 0) = 4 ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=536879104, userspace_addr=0x20000000}) = 0 ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 24.789648][ T23] audit: type=1400 audit(1738042010.959:67): avc: denied { read } for pid=358 comm="syz-executor946" name="kvm" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.828518][ T23] audit: type=1400 audit(1738042010.959:68): avc: denied { open } for pid=358 comm="syz-executor946" path="/dev/kvm" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.855146][ T23] audit: type=1400 audit(1738042010.959:69): avc: denied { ioctl } for pid=358 comm="syz-executor946" path="/dev/kvm" dev="devtmpfs" ino=116 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.861084][ T358] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 24.888274][ T358] #PF: supervisor instruction fetch in kernel mode [ 24.894606][ T358] #PF: error_code(0x0010) - not-present page [ 24.900428][ T358] PGD 1f4cf5067 P4D 1f4cf5067 PUD 1d9ab2067 PMD 0 [ 24.906758][ T358] Oops: 0010 [#1] PREEMPT SMP KASAN [ 24.911802][ T358] CPU: 1 PID: 358 Comm: syz-executor946 Not tainted 5.4.289-syzkaller-00025-g49530c73f82d #0 [ 24.921780][ T358] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 24.931695][ T358] RIP: 0010:0x86 [ 24.935056][ T358] Code: Bad RIP value. [ 24.938956][ T358] RSP: 0018:ffff8881ee45f308 EFLAGS: 00010086 [ 24.944861][ T358] RAX: ffff8881ee45f338 RBX: dffffc0000000000 RCX: ffff8881f32dee40 [ 24.952678][ T358] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.960485][ T358] RBP: 0000000000000270 R08: ffffffff8231c921 R09: ffffffff811c8f95 [ 24.968294][ T358] R10: ffff8881f32dee40 R11: 0000000000000002 R12: ffffffff84600228 [ 24.976106][ T358] R13: fffffe0000000278 R14: ffff8881ee8f0000 R15: fffffe000000027b [ 24.983922][ T358] FS: 000055556efcd480(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.993055][ T358] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.999456][ T358] CR2: 000000000000005c CR3: 00000001dd80b000 CR4: 00000000003426a0 [ 25.007357][ T358] Call Trace: [ 25.010497][ T358] ? __die+0xb4/0x100 [ 25.014298][ T358] ? no_context+0xac7/0xd20 [ 25.018639][ T358] ? is_prefetch+0x4b0/0x4b0 [ 25.023062][ T358] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 25.028448][ T358] ? __do_page_fault+0xa72/0xbb0 [ 25.033229][ T358] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 25.038871][ T358] ? __bad_area_nosemaphore+0xc0/0x470 [ 25.044162][ T358] ? page_fault+0x2f/0x40 [ 25.048322][ T358] ? irq_entries_start+0x38/0x660 [ 25.053187][ T358] ? vmx_handle_exit_irqoff+0x45/0x220 [ 25.058475][ T358] ? check_preemption_disabled+0x91/0x320 [ 25.064033][ T358] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 25.070282][ T358] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 25.076528][ T358] ? irq_entries_start+0x38/0x660 [ 25.081400][ T358] ? vcpu_enter_guest+0x2d06/0x9f70 [ 25.086430][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.091978][ T358] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 25.097273][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.102829][ T358] ? _raw_spin_lock+0x1b0/0x1b0 [ 25.107539][ T358] ? debug_smp_processor_id+0x20/0x20 [ 25.112727][ T358] ? local_bh_enable+0x20/0x20 [ 25.117326][ T358] ? internal_add_timer+0x34b/0x430 [ 25.122372][ T358] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 25.128002][ T358] ? __mod_timer+0x72b/0x13e0 [ 25.132511][ T358] ? mod_timer_pending+0x20/0x20 [ 25.137385][ T358] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 25.142679][ T358] ? read_msr+0x40/0x40 [ 25.146677][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.152317][ T358] ? __fd_install+0x119/0x230 [ 25.156819][ T358] ? update_load_avg+0x40f/0x1210 [ 25.161694][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.167235][ T358] ? debug_smp_processor_id+0x20/0x20 [ 25.172528][ T358] ? resched_curr+0x9b/0x200 [ 25.176951][ T358] ? check_preempt_wakeup+0x4f6/0x9f0 [ 25.182162][ T358] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 25.187192][ T358] ? try_to_wake_up+0x7c5/0x14f0 [ 25.191967][ T358] ? read_msr+0x40/0x40 [ 25.195960][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.201516][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.207069][ T358] ? debug_smp_processor_id+0x20/0x20 [ 25.212279][ T358] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 25.217831][ T358] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 25.222534][ T358] ? create_vcpu_fd+0x120/0x120 [ 25.227207][ T358] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 25.232152][ T358] ? _raw_spin_lock_irqsave+0x210/0x210 [ 25.237547][ T358] ? cgroup_update_frozen+0x157/0xab0 [ 25.242832][ T358] ? cgroup_update_frozen+0x157/0xab0 [ 25.248050][ T358] ? cgroup_leave_frozen+0x13c/0x290 [ 25.253162][ T358] ? ptrace_stop+0x6ee/0xa30 [ 25.257588][ T358] ? create_vcpu_fd+0x120/0x120 [ 25.262271][ T358] ? do_vfs_ioctl+0x742/0x1720 [ 25.266871][ T358] ? ioctl_preallocate+0x250/0x250 [ 25.271829][ T358] ? check_preemption_disabled+0x153/0x320 [ 25.277549][ T358] ? syscall_trace_enter+0x650/0x940 [ 25.282668][ T358] ? do_syscall_64+0x1c0/0x1c0 [ 25.287268][ T358] ? switch_fpu_return+0x1d4/0x410 [ 25.292214][ T358] ? security_file_ioctl+0x7d/0xa0 [ 25.297162][ T358] ? __x64_sys_ioctl+0xd4/0x110 [ 25.301855][ T358] ? do_syscall_64+0xca/0x1c0 [ 25.306362][ T358] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 25.312266][ T358] Modules linked in: [ 25.316019][ T358] CR2: 0000000000000086 [ 25.320003][ T358] ---[ end trace 98b72d026f1d377e ]--- [ 25.325300][ T358] RIP: 0010:0x86 [ 25.328682][ T358] Code: Bad RIP value. [ 25.332574][ T358] RSP: 0018:ffff8881ee45f308 EFLAGS: 00010086 [ 25.338478][ T358] RAX: ffff8881ee45f338 RBX: dffffc0000000000 RCX: ffff8881f32dee40 [ 25.346401][ T358] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 25.354192][ T358] RBP: 0000000000000270 R08: ffffffff8231c921 R09: ffffffff811c8f95 [ 25.362004][ T358] R10: ffff8881f32dee40 R11: 0000000000000002 R12: ffffffff84600228 [ 25.369986][ T358] R13: fffffe0000000278 R14: ffff8881ee8f0000 R15: fffffe000000027b [ 25.377794][ T358] FS: 000055556efcd480(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 25.386834][ T358] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.393354][ T358] CR2: 000000000000005c CR3: 00000001dd80b000 CR4: 00000000003426a0 [ 25.401154][ T358] Kernel panic - not syncing: Fatal exception [ 25.407347][ T358] Kernel Offset: disabled [ 25.411521][ T358] Rebooting in 86400 seconds..