// https://syzkaller.appspot.com/bug?id=f33695aedf3815e31123c7f52e24eee6deab3a23 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include 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; intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // mkdirat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 00} (length 0x6) // } // mode: open_mode = 0x1ff (8 bytes) // ] memcpy((void*)0x200000000000, "./sys\000", 6); syscall( __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000000ul, /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/ 0x1fful); // mount arguments: [ // src: nil // dst: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 00} (length 0x6) // } // type: ptr[in, buffer] { // buffer: {73 79 73 66 73 00} (length 0x6) // } // flags: mount_flags = 0x0 (8 bytes) // data: nil // ] memcpy((void*)0x200000000000, "./sys\000", 6); memcpy((void*)0x200000000100, "sysfs\000", 6); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000000ul, /*type=*/0x200000000100ul, /*flags=*/0ul, /*data=*/0ul); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 2f 62 75 73 2f 69 32 63 2f 64 65 76 69 63 65 // 73 2f 69 32 63 2d 30 2f 6e 65 77 5f 64 65 76 69 63 65 00} (length // 0x27) // } // flags: open_flags = 0x1 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x200000000200, "./sys/bus/i2c/devices/i2c-0/new_device\000", 39); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000200ul, /*flags=O_WRONLY*/ 1, /*mode=*/0); if (res != -1) r[0] = res; // write arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {73 74 75 73 62 31 36 30 30 20 30 78 32 38 00} (length 0xf) // } // count: len = 0xf (8 bytes) // ] memcpy((void*)0x200000000300, "stusb1600 0x28\000", 15); syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000300ul, /*count=*/0xful); return 0; }