./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2464174787 <...> Warning: Permanently added '10.128.1.14' (ED25519) to the list of known hosts. execve("./syz-executor2464174787", ["./syz-executor2464174787"], 0x7ffe498f09d0 /* 10 vars */) = 0 brk(NULL) = 0x5555558c3000 brk(0x5555558c3d00) = 0x5555558c3d00 arch_prctl(ARCH_SET_FS, 0x5555558c3380) = 0 set_tid_address(0x5555558c3650) = 355 set_robust_list(0x5555558c3660, 24) = 0 rseq(0x5555558c3ca0, 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-executor2464174787", 4096) = 28 getrandom("\x59\x3e\xab\x57\xb1\x13\x61\xd7", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555558c3d00 brk(0x5555558e4d00) = 0x5555558e4d00 brk(0x5555558e5000) = 0x5555558e5000 mprotect(0x7f86acfff000, 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=0x5555558c3650) = 356 ./strace-static-x86_64: Process 356 attached [pid 356] set_robust_list(0x5555558c3660, 24) = 0 [pid 356] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 356] setpgid(0, 0) = 0 [pid 356] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 356] write(3, "1000", 4) = 4 [pid 356] close(3) = 0 [pid 356] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 22.173969][ T23] audit: type=1400 audit(1714466815.890:66): avc: denied { execmem } for pid=355 comm="syz-executor246" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.182269][ T356] 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. [pid 356] ioctl(3, KVM_CREATE_VM, 0) = 4 [ 22.193653][ T23] audit: type=1400 audit(1714466815.900:67): avc: denied { read } for pid=356 comm="syz-executor246" name="kvm" dev="devtmpfs" ino=110 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 22.231867][ T23] audit: type=1400 audit(1714466815.900:68): avc: denied { open } for pid=356 comm="syz-executor246" path="/dev/kvm" dev="devtmpfs" ino=110 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 356] ioctl(4, KVM_CREATE_VCPU, 2) = 5 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=KVM_MEM_LOG_DIRTY_PAGES|KVM_MEM_READONLY, guest_phys_addr=0, memory_size=8192, userspace_addr=0x20000000}) = 0 [ 22.255126][ T23] audit: type=1400 audit(1714466815.900:69): avc: denied { ioctl } for pid=356 comm="syz-executor246" path="/dev/kvm" dev="devtmpfs" ino=110 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 22.295786][ T356] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 22.303398][ T356] #PF: supervisor instruction fetch in kernel mode [ 22.309728][ T356] #PF: error_code(0x0010) - not-present page [ 22.315547][ T356] PGD 1dfeeb067 P4D 1dfeeb067 PUD 1e0677067 PMD 0 [ 22.322057][ T356] Oops: 0010 [#1] PREEMPT SMP KASAN [ 22.327094][ T356] CPU: 1 PID: 356 Comm: syz-executor246 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 22.337070][ T356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 22.346984][ T356] RIP: 0010:0x86 [ 22.350441][ T356] Code: Bad RIP value. [ 22.354340][ T356] RSP: 0018:ffff8881dc037308 EFLAGS: 00010086 [ 22.360255][ T356] RAX: ffff8881dc037338 RBX: dffffc0000000000 RCX: ffff8881dcb92f40 [ 22.368053][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 22.375865][ T356] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 22.383764][ T356] R10: ffff8881dcb92f40 R11: 0000000000000002 R12: ffffffff846015d0 [ 22.391580][ T356] R13: fffffe0000000fd8 R14: ffff8881dc070000 R15: fffffe0000000fdb [ 22.399509][ T356] FS: 00005555558c3380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.408255][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.414676][ T356] CR2: 000000000000005c CR3: 00000001dc7c9000 CR4: 00000000003426a0 [ 22.422490][ T356] Call Trace: [ 22.425628][ T356] ? __die+0xb4/0x100 [ 22.429438][ T356] ? no_context+0xbda/0xe50 [ 22.433789][ T356] ? is_prefetch+0x4b0/0x4b0 [ 22.438203][ T356] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 22.443590][ T356] ? __do_page_fault+0xa7d/0xbb0 [ 22.448358][ T356] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 22.453913][ T356] ? __bad_area_nosemaphore+0xc0/0x460 [ 22.459204][ T356] ? page_fault+0x2f/0x40 [ 22.463369][ T356] ? call_function_interrupt+0x20/0x20 [ 22.468666][ T356] ? vmx_handle_exit_irqoff+0x45/0x220 [ 22.473959][ T356] ? check_preemption_disabled+0x91/0x320 [ 22.479512][ T356] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 22.485763][ T356] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 22.492012][ T356] ? call_function_interrupt+0x20/0x20 [ 22.497308][ T356] ? vcpu_enter_guest+0x2d06/0x9f70 [ 22.502341][ T356] ? update_rq_clock+0x67/0x350 [ 22.507028][ T356] ? local_bh_enable+0x20/0x20 [ 22.511630][ T356] ? check_preemption_disabled+0x9f/0x320 [ 22.517280][ T356] ? debug_smp_processor_id+0x20/0x20 [ 22.522490][ T356] ? llist_add_batch+0x91/0xb0 [ 22.527090][ T356] ? generic_exec_single+0x280/0x3e0 [ 22.532214][ T356] ? smp_call_function_single+0x4a0/0x4a0 [ 22.537766][ T356] ? smp_call_function_single+0x388/0x4a0 [ 22.543322][ T356] ? loaded_vmcs_clear+0x80/0x80 [ 22.548093][ T356] ? generic_smp_call_function_single_interrupt+0x10/0x10 [ 22.555037][ T356] ? check_preemption_disabled+0x9f/0x320 [ 22.560591][ T356] ? loaded_vmcs_clear+0x80/0x80 [ 22.565364][ T356] ? debug_smp_processor_id+0x20/0x20 [ 22.570589][ T356] ? get_cpu_entry_area+0x8/0x30 [ 22.575345][ T356] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 22.580380][ T356] ? read_msr+0x40/0x40 [ 22.584371][ T356] ? check_preemption_disabled+0x9f/0x320 [ 22.589944][ T356] ? debug_smp_processor_id+0x20/0x20 [ 22.595139][ T356] ? kvm_check_async_pf_completion+0x335/0x350 [ 22.601129][ T356] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 22.606681][ T356] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 22.611366][ T356] ? create_vcpu_fd+0x120/0x120 [ 22.616050][ T356] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 22.620999][ T356] ? _raw_spin_lock_irqsave+0x210/0x210 [ 22.626383][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 22.631588][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 22.636795][ T356] ? cgroup_leave_frozen+0x13c/0x290 [ 22.641918][ T356] ? ptrace_stop+0x6ee/0xa30 [ 22.646342][ T356] ? create_vcpu_fd+0x120/0x120 [ 22.651121][ T356] ? do_vfs_ioctl+0x742/0x1720 [ 22.655715][ T356] ? ioctl_preallocate+0x250/0x250 [ 22.660663][ T356] ? check_preemption_disabled+0x153/0x320 [ 22.666650][ T356] ? syscall_trace_enter+0x650/0x940 [ 22.671774][ T356] ? do_syscall_64+0x1c0/0x1c0 [ 22.676371][ T356] ? switch_fpu_return+0x1d4/0x410 [ 22.681320][ T356] ? security_file_ioctl+0x7d/0xa0 [ 22.686267][ T356] ? __x64_sys_ioctl+0xd4/0x110 [ 22.690953][ T356] ? do_syscall_64+0xca/0x1c0 [ 22.695466][ T356] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 22.701367][ T356] Modules linked in: [ 22.705112][ T356] CR2: 0000000000000086 [ 22.709098][ T356] ---[ end trace 371c913ce2a69350 ]--- [ 22.714398][ T356] RIP: 0010:0x86 [ 22.717770][ T356] Code: Bad RIP value. [ 22.721672][ T356] RSP: 0018:ffff8881dc037308 EFLAGS: 00010086 [ 22.727577][ T356] RAX: ffff8881dc037338 RBX: dffffc0000000000 RCX: ffff8881dcb92f40 [ 22.735389][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 22.743199][ T356] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 22.751010][ T356] R10: ffff8881dcb92f40 R11: 0000000000000002 R12: ffffffff846015d0 [ 22.758821][ T356] R13: fffffe0000000fd8 R14: ffff8881dc070000 R15: fffffe0000000fdb [ 22.766637][ T356] FS: 00005555558c3380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.775399][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.781819][ T356] CR2: 000000000000005c CR3: 00000001dc7c9000 CR4: 00000000003426a0 [ 22.789635][ T356] Kernel panic - not syncing: Fatal exception [ 22.795720][ T356] Kernel Offset: disabled [ 22.799845][ T356] Rebooting in 86400 seconds..