// https://syzkaller.appspot.com/bug?id=432a68f59fdba51ac26189f0b70da83e1741c924 // 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)) { } // mkdir arguments: [ // path: ptr[in, buffer] { // buffer: {2e 2f 6d 6e 74 00} (length 0x6) // } // mode: open_mode = 0x1ff (8 bytes) // ] memcpy((void*)0x200000000040, "./mnt\000", 6); syscall( __NR_mkdir, /*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 6e 74 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*)0x2000000000c0, "./mnt\000", 6); memcpy((void*)0x200000000100, "sysfs\000", 6); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x2000000000c0ul, /*type=*/0x200000000100ul, /*flags=*/0ul, /*data=*/0ul); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 6d 6e 74 2f 6d 6f 64 75 6c 65 2f 62 6c 6f 63 6b 32 6d // 74 64 2f 70 61 72 61 6d 65 74 65 72 73 2f 62 6c 6f 63 6b 32 6d 74 64 // 00} (length 0x2c) // } // flags: open_flags = 0x1 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x200000000180, "./mnt/module/block2mtd/parameters/block2mtd\000", 44); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000180ul, /*flags=O_WRONLY*/ 1, /*mode=*/0); if (res != -1) r[0] = res; // write arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 6c 6f 6f 70 30 2c} (length 0xb) // } // count: len = 0xb (8 bytes) // ] memcpy((void*)0x2000000001c0, "/dev/loop0,", 11); syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x2000000001c0ul, /*count=*/0xbul); return 0; }