// https://syzkaller.appspot.com/bug?id=83aa676a823eeb2855ab831541b2c8175904c281 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // openat$kvm arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 6b 76 6d 00} (length 0x9) // } // flags: open_flags = 0x0 (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd_kvm memcpy((void*)0x200000000100, "/dev/kvm\000", 9); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000100ul, /*flags=*/0, /*mode=*/0); if (res != -1) r[0] = res; // ioctl$KVM_CREATE_VM arguments: [ // fd: fd_kvm (resource) // cmd: const = 0xae01 (4 bytes) // type: intptr = 0x0 (8 bytes) // ] // returns fd_kvmvm res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xae01, /*type=*/0ul); if (res != -1) r[1] = res; // ioctl$KVM_CREATE_IRQCHIP arguments: [ // fd: fd_kvmvm (resource) // cmd: const = 0xae60 (4 bytes) // ] syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0xae60, 0); // ioctl$KVM_CREATE_VCPU arguments: [ // fd: fd_kvmvm (resource) // cmd: const = 0xae41 (4 bytes) // id: intptr = 0x2 (8 bytes) // ] // returns fd_kvmcpu res = syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0xae41, /*id=*/2ul); if (res != -1) r[2] = res; // ioctl$KVM_SET_REGS arguments: [ // fd: fd_kvmcpu (resource) // cmd: const = 0x4090ae82 (4 bytes) // arg: ptr[in, kvm_regs] { // kvm_regs { // gp: array[int64] { // int64 = 0x3ff (8 bytes) // int64 = 0x2 (8 bytes) // int64 = 0x3 (8 bytes) // int64 = 0x7fffffffffffffff (8 bytes) // int64 = 0x58f24868 (8 bytes) // int64 = 0x4 (8 bytes) // int64 = 0x7f (8 bytes) // int64 = 0x80000002 (8 bytes) // int64 = 0x9 (8 bytes) // int64 = 0x0 (8 bytes) // int64 = 0x6 (8 bytes) // int64 = 0x1 (8 bytes) // int64 = 0x2 (8 bytes) // int64 = 0x6 (8 bytes) // int64 = 0x8 (8 bytes) // int64 = 0x81 (8 bytes) // } // rip: kvm_guest_addrs = 0x54000 (8 bytes) // rflags: kvm_x86_rflags = 0x100204 (8 bytes) // } // } // ] *(uint64_t*)0x200000000440 = 0x3ff; *(uint64_t*)0x200000000448 = 2; *(uint64_t*)0x200000000450 = 3; *(uint64_t*)0x200000000458 = 0x7fffffffffffffff; *(uint64_t*)0x200000000460 = 0x58f24868; *(uint64_t*)0x200000000468 = 4; *(uint64_t*)0x200000000470 = 0x7f; *(uint64_t*)0x200000000478 = 0x80000002; *(uint64_t*)0x200000000480 = 9; *(uint64_t*)0x200000000488 = 0; *(uint64_t*)0x200000000490 = 6; *(uint64_t*)0x200000000498 = 1; *(uint64_t*)0x2000000004a0 = 2; *(uint64_t*)0x2000000004a8 = 6; *(uint64_t*)0x2000000004b0 = 8; *(uint64_t*)0x2000000004b8 = 0x81; *(uint64_t*)0x2000000004c0 = 0x54000; *(uint64_t*)0x2000000004c8 = 0x100204; syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x4090ae82, /*arg=*/0x200000000440ul); // ioctl$KVM_SET_VCPU_EVENTS arguments: [ // fd: fd_kvmcpu (resource) // cmd: const = 0x4400ae8f (4 bytes) // arg: ptr[in, kvm_vcpu_events] { // union kvm_vcpu_events { // x86: kvm_vcpu_events_x86 { // exinjec: int8 = 0x6 (1 bytes) // exnr: int8 = 0x8 (1 bytes) // exhec: int8 = 0xc5 (1 bytes) // pad1: const = 0x0 (1 bytes) // exec: int32 = 0x6 (4 bytes) // ininjec: int8 = 0x9 (1 bytes) // innr: int8 = 0x4 (1 bytes) // insoft: int8 = 0x6 (1 bytes) // inshad: int8 = 0x1 (1 bytes) // nmiinj: int8 = 0xf8 (1 bytes) // nmipend: int8 = 0x0 (1 bytes) // nmimask: int8 = 0x2 (1 bytes) // pad2: const = 0x0 (1 bytes) // sipi_vector: int32 = 0x3 (4 bytes) // flags: int32 = 0xfffffffc (4 bytes) // smismm: int8 = 0x6 (1 bytes) // smipend: int8 = 0x9 (1 bytes) // smiinsi: int8 = 0x4 (1 bytes) // smilatc: int8 = 0xfe (1 bytes) // reserved: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 // 00 00 00 00 00 00 00 00 00 00 00} (length 0x1b) // exception_has_payload: int8 = 0x4 (1 bytes) // exception_payload: int64 = 0x4 (8 bytes) // } // } // } // ] *(uint8_t*)0x200000000140 = 6; *(uint8_t*)0x200000000141 = 8; *(uint8_t*)0x200000000142 = 0xc5; *(uint8_t*)0x200000000143 = 0; *(uint32_t*)0x200000000144 = 6; *(uint8_t*)0x200000000148 = 9; *(uint8_t*)0x200000000149 = 4; *(uint8_t*)0x20000000014a = 6; *(uint8_t*)0x20000000014b = 1; *(uint8_t*)0x20000000014c = 0xf8; *(uint8_t*)0x20000000014d = 0; *(uint8_t*)0x20000000014e = 2; *(uint8_t*)0x20000000014f = 0; *(uint32_t*)0x200000000150 = 3; *(uint32_t*)0x200000000154 = 0xfffffffc; *(uint8_t*)0x200000000158 = 6; *(uint8_t*)0x200000000159 = 9; *(uint8_t*)0x20000000015a = 4; *(uint8_t*)0x20000000015b = 0xfe; memset((void*)0x20000000015c, 0, 27); *(uint8_t*)0x200000000177 = 4; *(uint64_t*)0x200000000178 = 4; syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x4400ae8f, /*arg=*/0x200000000140ul); // ioctl$KVM_RUN arguments: [ // fd: fd_kvmcpu (resource) // cmd: const = 0xae80 (4 bytes) // arg: const = 0x0 (8 bytes) // ] syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0xae80, /*arg=*/0ul); return 0; }