// https://syzkaller.appspot.com/bug?id=f6c6bc6a423c0b37015b0738486183b95b11ff25 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 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)) { } // mkdirat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 00} (length 0x6) // } // mode: open_mode = 0x33 (8 bytes) // ] memcpy((void*)0x200000000000, "./sys\000", 6); syscall(__NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000000ul, /*mode=S_IXOTH|S_IWOTH|S_IWGRP|S_IRGRP*/ 0x33ul); // 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*)0x200000000080, "sysfs\000", 6); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000000ul, /*type=*/0x200000000080ul, /*flags=*/0ul, /*data=*/0ul); // openat$dir arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 2f 62 75 73 2f 70 6e 70 2f 64 72 69 76 65 72 // 73 2f 73 65 72 69 61 6c 00} (length 0x1d) // } // flags: open_flags = 0x0 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd_dir memcpy((void*)0x200000000100, "./sys/bus/pnp/drivers/serial\000", 29); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000100ul, /*flags=*/0, /*mode=*/0); if (res != -1) r[0] = res; // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {75 6e 62 69 6e 64 00} (length 0x7) // } // flags: open_flags = 0x1 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x200000000140, "unbind\000", 7); res = syscall(__NR_openat, /*fd=*/r[0], /*file=*/0x200000000140ul, /*flags=O_WRONLY*/ 1, /*mode=*/0); if (res != -1) r[1] = res; // write arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {30 30 3a 30 33 0a} (length 0x6) // } // count: len = 0x6 (8 bytes) // ] memcpy((void*)0x2000000001c0, "00:03\n", 6); syscall(__NR_write, /*fd=*/r[1], /*buf=*/0x2000000001c0ul, /*count=*/6ul); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 2f 63 6c 61 73 73 2f 74 74 79 2f 74 74 79 53 // 30 2f 63 6f 6e 73 6f 6c 65 00} (length 0x1e) // } // flags: open_flags = 0x2 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x200000000400, "./sys/class/tty/ttyS0/console\000", 30); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000400ul, /*flags=O_RDWR*/ 2, /*mode=*/0); if (res != -1) r[2] = res; // write$binfmt_format arguments: [ // fd: fd_binfmt_format (resource) // data: ptr[in, buffer] { // buffer: {31 00} (length 0x2) // } // len: bytesize = 0x2 (8 bytes) // ] memcpy((void*)0x200000000080, "1\000", 2); syscall(__NR_write, /*fd=*/r[2], /*data=*/0x200000000080ul, /*len=*/2ul); // mkdirat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 6d 79 70 72 6f 63 00} (length 0x9) // } // mode: open_mode = 0x1ff (8 bytes) // ] memcpy((void*)0x200000000040, "./myproc\000", 9); syscall( __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000040ul, /*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 70 72 6f 63 00} (length 0x9) // } // type: ptr[in, buffer] { // buffer: {70 72 6f 63 00} (length 0x5) // } // flags: mount_flags = 0x0 (8 bytes) // data: nil // ] memcpy((void*)0x200000000100, "./myproc\000", 9); memcpy((void*)0x200000000200, "proc\000", 5); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000100ul, /*type=*/0x200000000200ul, /*flags=*/0ul, /*data=*/0ul); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 6d 79 70 72 6f 63 2f 69 6e 74 65 72 72 75 70 74 73 00} // (length 0x14) // } // flags: open_flags = 0x0 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x200000000300, "./myproc/interrupts\000", 20); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000300ul, /*flags=*/0, /*mode=*/0); if (res != -1) r[3] = res; // socket$nl_route arguments: [ // domain: const = 0x10 (8 bytes) // type: const = 0x3 (8 bytes) // proto: const = 0x0 (4 bytes) // ] // returns sock_nl_route res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0); if (res != -1) r[4] = res; // sendfile arguments: [ // fdout: fd (resource) // fdin: fd (resource) // off: nil // count: intptr = 0x7ff (8 bytes) // ] syscall(__NR_sendfile, /*fdout=*/r[4], /*fdin=*/r[3], /*off=*/0ul, /*count=*/0x7fful); return 0; }