// https://syzkaller.appspot.com/bug?id=693e1dd6d81d36eda0cf8f0124a80cdae5c80af2 // 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 6d 79 63 6f 6e 66 69 67 00} (length 0xb) // } // mode: open_mode = 0x1ff (8 bytes) // ] memcpy((void*)0x200000000140, "./myconfig\000", 11); syscall( __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000140ul, /*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 6d 79 63 6f 6e 66 69 67 00} (length 0xb) // } // type: ptr[in, buffer] { // buffer: {63 6f 6e 66 69 67 66 73 00} (length 0x9) // } // flags: mount_flags = 0x0 (8 bytes) // data: nil // ] memcpy((void*)0x2000000001c0, "./myconfig\000", 11); memcpy((void*)0x200000000200, "configfs\000", 9); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x2000000001c0ul, /*type=*/0x200000000200ul, /*flags=*/0ul, /*data=*/0ul); // mkdirat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 6d 79 63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 // 74 2f 67 31 00} (length 0x19) // } // mode: open_mode = 0x1ff (8 bytes) // ] memcpy((void*)0x200000000240, "./myconfig/usb_gadget/g1\000", 25); syscall( __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000240ul, /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/ 0x1fful); // mkdirat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 6d 79 63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 // 74 2f 67 31 2f 66 75 6e 63 74 69 6f 6e 73 2f 75 61 63 32 2e 75 73 62 // 30 00} (length 0x2d) // } // mode: open_mode = 0x1ff (8 bytes) // ] memcpy((void*)0x2000000003c0, "./myconfig/usb_gadget/g1/functions/uac2.usb0\000", 45); syscall( __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x2000000003c0ul, /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/ 0x1fful); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 6d 79 63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 // 74 2f 67 31 2f 66 75 6e 63 74 69 6f 6e 73 2f 75 61 63 32 2e 75 73 62 // 30 2f 70 5f 73 72 61 74 65 00} (length 0x35) // } // flags: open_flags = 0x1 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x200000000400, "./myconfig/usb_gadget/g1/functions/uac2.usb0/p_srate\000", 53); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000400ul, /*flags=O_WRONLY*/ 1, /*mode=*/0); if (res != -1) r[0] = res; // pwritev arguments: [ // fd: fd (resource) // vec: ptr[in, array[iovec[in, array[int8]]]] { // array[iovec[in, array[int8]]] { // iovec[in, array[int8]] { // addr: ptr[in, buffer] { // buffer: {2c 99 31 29 0f ab ce d7 7c} (length 0x9) // } // len: len = 0x9 (8 bytes) // } // } // } // vlen: len = 0x1 (8 bytes) // off_low: int32 = 0x1 (4 bytes) // off_high: int32 = 0x6 (4 bytes) // ] *(uint64_t*)0x200000000040 = 0x200000000000; memcpy((void*)0x200000000000, "\x2c\x99\x31\x29\x0f\xab\xce\xd7\x7c", 9); *(uint64_t*)0x200000000048 = 9; syscall(__NR_pwritev, /*fd=*/r[0], /*vec=*/0x200000000040ul, /*vlen=*/1ul, /*off_low=*/1, /*off_high=*/6); return 0; }