./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1812925151 <...> Warning: Permanently added '10.128.0.246' (ED25519) to the list of known hosts. execve("./syz-executor1812925151", ["./syz-executor1812925151"], 0x7ffe24c80fb0 /* 10 vars */) = 0 brk(NULL) = 0x555555570000 brk(0x555555570d00) = 0x555555570d00 arch_prctl(ARCH_SET_FS, 0x555555570380) = 0 set_tid_address(0x555555570650) = 355 set_robust_list(0x555555570660, 24) = 0 rseq(0x555555570ca0, 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-executor1812925151", 4096) = 28 getrandom("\x11\x16\x9b\xea\xf7\x19\x1d\x6f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555570d00 brk(0x555555591d00) = 0x555555591d00 brk(0x555555592000) = 0x555555592000 mprotect(0x7f8c43bcb000, 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=0x555555570650) = 356 ./strace-static-x86_64: Process 356 attached [pid 356] set_robust_list(0x555555570660, 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 [ 23.257284][ T23] audit: type=1400 audit(1711912265.570:66): avc: denied { execmem } for pid=355 comm="syz-executor181" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.263045][ 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. [ 23.276998][ T23] audit: type=1400 audit(1711912265.570:67): avc: denied { read } for pid=356 comm="syz-executor181" name="kvm" dev="devtmpfs" ino=9199 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.314995][ T23] audit: type=1400 audit(1711912265.570:68): avc: denied { open } for pid=356 comm="syz-executor181" path="/dev/kvm" dev="devtmpfs" ino=9199 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 356] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 356] dup(4) = 5 [pid 356] ioctl(5, KVM_CREATE_VCPU, 0) = 6 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=4096, userspace_addr=0x20000000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=1, flags=0, guest_phys_addr=0x1000, memory_size=4096, userspace_addr=0x20001000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=2, flags=0, guest_phys_addr=0x2000, memory_size=4096, userspace_addr=0x20002000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=3, flags=0, guest_phys_addr=0x3000, memory_size=4096, userspace_addr=0x20003000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=4, flags=0, guest_phys_addr=0x4000, memory_size=4096, userspace_addr=0x20004000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=5, flags=0, guest_phys_addr=0x5000, memory_size=4096, userspace_addr=0x20005000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=6, flags=0, guest_phys_addr=0x6000, memory_size=4096, userspace_addr=0x20006000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=7, flags=0, guest_phys_addr=0x7000, memory_size=4096, userspace_addr=0x20007000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=8, flags=0, guest_phys_addr=0x8000, memory_size=4096, userspace_addr=0x20008000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=9, flags=0, guest_phys_addr=0x9000, memory_size=4096, userspace_addr=0x20009000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=10, flags=0, guest_phys_addr=0xfec00000, memory_size=4096, userspace_addr=0x2000a000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=11, flags=0, guest_phys_addr=0xb000, memory_size=4096, userspace_addr=0x2000b000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=12, flags=0, guest_phys_addr=0xc000, memory_size=4096, userspace_addr=0x2000c000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=13, flags=0, guest_phys_addr=0xd000, memory_size=4096, userspace_addr=0x2000d000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=14, flags=0, guest_phys_addr=0xe000, memory_size=4096, userspace_addr=0x2000e000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=15, flags=0, guest_phys_addr=0xf000, memory_size=4096, userspace_addr=0x2000f000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=16, flags=0, guest_phys_addr=0x10000, memory_size=4096, userspace_addr=0x20010000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=17, flags=0, guest_phys_addr=0x11000, memory_size=4096, userspace_addr=0x20011000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=18, flags=0, guest_phys_addr=0x12000, memory_size=4096, userspace_addr=0x20012000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=19, flags=0, guest_phys_addr=0x13000, memory_size=4096, userspace_addr=0x20013000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=20, flags=0, guest_phys_addr=0x14000, memory_size=4096, userspace_addr=0x20014000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=21, flags=0, guest_phys_addr=0x15000, memory_size=4096, userspace_addr=0x20015000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=22, flags=0, guest_phys_addr=0x16000, memory_size=4096, userspace_addr=0x20016000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=23, flags=0, guest_phys_addr=0x17000, memory_size=4096, userspace_addr=0x20017000}) = 0 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=65537, flags=0, guest_phys_addr=0x30000, memory_size=65536, userspace_addr=0x20000000}) = 0 [pid 356] ioctl(6, KVM_GET_SREGS, {cs={base=0xffff0000, limit=65535, selector=61440, type=11, present=1, dpl=0, db=0, s=1, l=0, g=0, avl=0}, ...}) = 0 [ 23.338133][ T23] audit: type=1400 audit(1711912265.570:69): avc: denied { ioctl } for pid=356 comm="syz-executor181" path="/dev/kvm" dev="devtmpfs" ino=9199 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 356] openat(AT_FDCWD, "/dev/kvm", O_RDWR) = 7 [pid 356] ioctl(7, KVM_GET_SUPPORTED_CPUID, {nent=33, entries=[...]}) = 0 [pid 356] ioctl(6, KVM_SET_CPUID2, {nent=33, entries=[...]}) = 0 [pid 356] close(7) = 0 [pid 356] ioctl(6, KVM_SET_MSRS, 0x7ffe3f94c230) = 5 [pid 356] ioctl(6, KVM_SET_SREGS, {cs={base=0, limit=1048575, selector=48, type=11, present=1, dpl=0, db=1, s=1, l=0, g=0, avl=0}, ...}) = 0 [pid 356] ioctl(6, KVM_SET_REGS, {rax=0, ..., rsp=0xf80, rbp=0, ..., rip=0, rflags=0x2}) = 0 [ 23.383734][ T23] audit: type=1400 audit(1711912265.690:70): avc: denied { write } for pid=356 comm="syz-executor181" name="kvm" dev="devtmpfs" ino=9199 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.411291][ T356] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 23.418896][ T356] #PF: supervisor instruction fetch in kernel mode [ 23.425233][ T356] #PF: error_code(0x0010) - not-present page [ 23.431045][ T356] PGD 1dc0e1067 P4D 1dc0e1067 PUD 1dc0e2067 PMD 0 [ 23.437386][ T356] Oops: 0010 [#1] PREEMPT SMP KASAN [ 23.442418][ T356] CPU: 1 PID: 356 Comm: syz-executor181 Not tainted 5.4.268-syzkaller-00011-g47710d1d3563 #0 [ 23.452485][ T356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 23.462380][ T356] RIP: 0010:0x86 [ 23.465767][ T356] Code: Bad RIP value. [ 23.469670][ T356] RSP: 0018:ffff8881dc1ff308 EFLAGS: 00010086 [ 23.475572][ T356] RAX: ffff8881dc1ff338 RBX: dffffc0000000000 RCX: ffff8881dc0b0fc0 [ 23.483380][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.491207][ T356] RBP: 0000000000000270 R08: ffffffff82315341 R09: ffffffff811c9085 [ 23.499119][ T356] R10: ffff8881dc0b0fc0 R11: 0000000000000002 R12: ffffffff84600228 [ 23.506934][ T356] R13: fffffe0000000278 R14: ffff8881dc280000 R15: fffffe000000027b [ 23.514744][ T356] FS: 0000555555570380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.524035][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.530453][ T356] CR2: 000000000000005c CR3: 00000001dc0d0000 CR4: 00000000003426a0 [ 23.538269][ T356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.546692][ T356] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.554494][ T356] Call Trace: [ 23.557637][ T356] ? __die+0xb4/0x100 [ 23.561455][ T356] ? no_context+0xbda/0xe50 [ 23.565821][ T356] ? is_prefetch+0x4b0/0x4b0 [ 23.570211][ T356] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 23.575591][ T356] ? __do_page_fault+0xa7d/0xbb0 [ 23.580365][ T356] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 23.585921][ T356] ? __bad_area_nosemaphore+0xc0/0x460 [ 23.591211][ T356] ? page_fault+0x2f/0x40 [ 23.595375][ T356] ? irq_entries_start+0x38/0x660 [ 23.600236][ T356] ? vmx_handle_exit_irqoff+0x45/0x220 [ 23.605529][ T356] ? check_preemption_disabled+0x91/0x320 [ 23.611090][ T356] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 23.617367][ T356] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 23.623589][ T356] ? irq_entries_start+0x38/0x660 [ 23.628447][ T356] ? vcpu_enter_guest+0x2d06/0x9f70 [ 23.633479][ T356] ? unwind_next_frame+0x181e/0x1ea0 [ 23.638692][ T356] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 23.644592][ T356] ? _raw_spin_lock+0xa4/0x1b0 [ 23.649191][ T356] ? local_bh_enable+0x20/0x20 [ 23.653788][ T356] ? page_fault+0x2f/0x40 [ 23.657953][ T356] ? stack_trace_save+0x1c0/0x1c0 [ 23.662814][ T356] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 23.668718][ T356] ? arch_stack_walk+0x111/0x140 [ 23.673492][ T356] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 23.679411][ T356] ? page_fault+0x2f/0x40 [ 23.683564][ T356] ? __unwind_start+0x708/0x890 [ 23.688251][ T356] ? deref_stack_reg+0x1f0/0x1f0 [ 23.693031][ T356] ? check_preemption_disabled+0x9f/0x320 [ 23.698584][ T356] ? update_load_avg+0x40f/0x1210 [ 23.703438][ T356] ? sched_clock_cpu+0x18/0x3a0 [ 23.708211][ T356] ? check_preemption_disabled+0x9f/0x320 [ 23.713766][ T356] ? debug_smp_processor_id+0x20/0x20 [ 23.718980][ T356] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 23.724009][ T356] ? try_to_wake_up+0x7c5/0x14f0 [ 23.728779][ T356] ? read_msr+0x40/0x40 [ 23.732770][ T356] ? check_preemption_disabled+0x9f/0x320 [ 23.738325][ T356] ? check_preemption_disabled+0x9f/0x320 [ 23.743891][ T356] ? debug_smp_processor_id+0x20/0x20 [ 23.749091][ T356] ? kvm_check_async_pf_completion+0x335/0x350 [ 23.755078][ T356] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 23.760635][ T356] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 23.765319][ T356] ? create_vcpu_fd+0x120/0x120 [ 23.770016][ T356] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 23.774951][ T356] ? _raw_spin_lock_irqsave+0x210/0x210 [ 23.780337][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 23.785542][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 23.790752][ T356] ? cgroup_leave_frozen+0x13c/0x290 [ 23.795879][ T356] ? ptrace_stop+0x6ee/0xa30 [ 23.800300][ T356] ? create_vcpu_fd+0x120/0x120 [ 23.804985][ T356] ? do_vfs_ioctl+0x742/0x1720 [ 23.809596][ T356] ? ioctl_preallocate+0x250/0x250 [ 23.814535][ T356] ? check_preemption_disabled+0x153/0x320 [ 23.820173][ T356] ? syscall_trace_enter+0x650/0x940 [ 23.825380][ T356] ? do_syscall_64+0x1c0/0x1c0 [ 23.829984][ T356] ? switch_fpu_return+0x1d4/0x410 [ 23.834929][ T356] ? security_file_ioctl+0x7d/0xa0 [ 23.839875][ T356] ? __x64_sys_ioctl+0xd4/0x110 [ 23.844561][ T356] ? do_syscall_64+0xca/0x1c0 [ 23.849076][ T356] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 23.854972][ T356] Modules linked in: [ 23.858716][ T356] CR2: 0000000000000086 [ 23.862701][ T356] ---[ end trace 31db843a39727d11 ]--- [ 23.867995][ T356] RIP: 0010:0x86 [ 23.871381][ T356] Code: Bad RIP value. [ 23.875398][ T356] RSP: 0018:ffff8881dc1ff308 EFLAGS: 00010086 [ 23.881311][ T356] RAX: ffff8881dc1ff338 RBX: dffffc0000000000 RCX: ffff8881dc0b0fc0 [ 23.889113][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.896928][ T356] RBP: 0000000000000270 R08: ffffffff82315341 R09: ffffffff811c9085 [ 23.904735][ T356] R10: ffff8881dc0b0fc0 R11: 0000000000000002 R12: ffffffff84600228 [ 23.912549][ T356] R13: fffffe0000000278 R14: ffff8881dc280000 R15: fffffe000000027b [ 23.920361][ T356] FS: 0000555555570380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.929128][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.935548][ T356] CR2: 000000000000005c CR3: 00000001dc0d0000 CR4: 00000000003426a0 [ 23.943361][ T356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.951169][ T356] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.958979][ T356] Kernel panic - not syncing: Fatal exception [ 23.965146][ T356] Kernel Offset: disabled [ 23.969268][ T356] Rebooting in 86400 seconds..