// https://syzkaller.appspot.com/bug?id=432bab1ba2256ad6b034ad222e0101c65d8b2163 // 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)) { } // openat$fb0 arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 66 62 30 00} (length 0x9) // } // flags: open_flags = 0x802 (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd_fb memcpy((void*)0x200000001600, "/dev/fb0\000", 9); syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000001600ul, /*flags=O_NONBLOCK|O_RDWR*/ 0x802, /*mode=*/0); // mkdir arguments: [ // path: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 00} (length 0x6) // } // mode: open_mode = 0x0 (8 bytes) // ] memcpy((void*)0x200000000540, "./sys\000", 6); syscall(__NR_mkdir, /*path=*/0x200000000540ul, /*mode=*/0ul); // 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*)0x200000000100, "./sys\000", 6); memcpy((void*)0x200000000040, "sysfs\000", 6); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000100ul, /*type=*/0x200000000040ul, /*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 70 63 69 2f 64 65 76 69 63 65 // 73 2f 30 30 30 30 3a 30 30 3a 30 31 2e 30 2f 72 65 6d 6f 76 65 00} // (length 0x2a) // } // flags: open_flags = 0x1 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x200000000080, "./sys/bus/pci/devices/0000:00:01.0/remove\000", 42); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000080ul, /*flags=O_WRONLY*/ 1, /*mode=*/0); if (res != -1) r[0] = res; // write arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {31} (length 0x1) // } // count: len = 0x1 (8 bytes) // ] memset((void*)0x2000000000c0, 49, 1); syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x2000000000c0ul, /*count=*/1ul); return 0; }