// https://syzkaller.appspot.com/bug?id=ff526a91a38ca1d1ce496abdfeb1c7f44cb6f779 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } uint64_t r[1] = {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; use_temporary_dir(); intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // openat$uhid arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 75 68 69 64 00} (length 0xa) // } // flags: uhid_open_flags = 0x2 (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd_uhid memcpy((void*)0x200000000000, "/dev/uhid\000", 10); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000000ul, /*flags=O_RDWR*/ 2, /*mode=*/0); if (res != -1) r[0] = res; // write$UHID_CREATE2 arguments: [ // fd: fd_uhid (resource) // data: ptr[in, uhid_req[UHID_CREATE2, uhid_create2_req]] { // uhid_req[UHID_CREATE2, uhid_create2_req] { // type: const = 0xb (4 bytes) // data: uhid_create2_req { // name: buffer: {73 79 7a 30 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 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 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 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 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 // 00} (length 0x80) phys: buffer: {73 79 7a 31 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 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 00 00 00 00 00 00} (length 0x40) uniq: buffer: {73 79 7a // 30 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 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 00 00 00 00 00 00} (length 0x40) // rd_size: len = 0x43 (2 bytes) // bus: int16 = 0x3 (2 bytes) // vendor: int32 = 0x4d8 (4 bytes) // product: int32 = 0xc002 (4 bytes) // version: int32 = 0x0 (4 bytes) // country: int32 = 0x0 (4 bytes) // rd_data: buffer: {05 01 09 00 a1 01 85 11 09 01 15 00 26 ff 00 75 // 08 95 02 81 02 85 21 09 02 15 00 26 ff 00 75 08 95 01 81 02 85 91 // 09 04 15 00 26 ff 00 75 08 95 01 91 02 85 92 09 03 15 00 26 ff 00 // 75 08 95 01 91 02 c0} (length 0x43) // } // } // } // len: len = 0x15b (8 bytes) // ] *(uint32_t*)0x200000000100 = 0xb; memcpy( (void*)0x200000000104, "syz0\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 128); memcpy((void*)0x200000000184, "syz1\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000", 64); memcpy((void*)0x2000000001c4, "syz0\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000", 64); *(uint16_t*)0x200000000204 = 0x43; *(uint16_t*)0x200000000206 = 3; *(uint32_t*)0x200000000208 = 0x4d8; *(uint32_t*)0x20000000020c = 0xc002; *(uint32_t*)0x200000000210 = 0; *(uint32_t*)0x200000000214 = 0; memcpy((void*)0x200000000218, "\x05\x01\x09\x00\xa1\x01\x85\x11\x09\x01\x15\x00\x26\xff\x00\x75\x08" "\x95\x02\x81\x02\x85\x21\x09\x02\x15\x00\x26\xff\x00\x75\x08\x95\x01" "\x81\x02\x85\x91\x09\x04\x15\x00\x26\xff\x00\x75\x08\x95\x01\x91\x02" "\x85\x92\x09\x03\x15\x00\x26\xff\x00\x75\x08\x95\x01\x91\x02\xc0", 67); syscall(__NR_write, /*fd=*/r[0], /*data=*/0x200000000100ul, /*len=*/0x15bul); return 0; }