// https://syzkaller.appspot.com/bug?id=d77a8bffdcb19176ebd494435f933a70ea36aaf4 // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1) #define BITMASK_LEN_OFF(type, bf_off, bf_len) \ (type)(BITMASK_LEN(type, (bf_len)) << (bf_off)) #define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len) \ if ((bf_off) == 0 && (bf_len) == 0) { \ *(type*)(addr) = (type)(val); \ } else { \ type new_val = *(type*)(addr); \ new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len)); \ new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off); \ *(type*)(addr) = new_val; \ } struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i; for (i = 0; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += (uint16_t)data[length - 1]; while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } uint64_t r[1] = {0xffffffffffffffff}; void loop() { long res; res = syscall(__NR_socket, 0xa, 0x2100000000000002, 0); if (res != -1) r[0] = res; *(uint16_t*)0x20000000 = 0xa; *(uint16_t*)0x20000002 = htobe16(0x4e22); *(uint32_t*)0x20000004 = 0; *(uint8_t*)0x20000008 = 0; *(uint8_t*)0x20000009 = 0; *(uint8_t*)0x2000000a = 0; *(uint8_t*)0x2000000b = 0; *(uint8_t*)0x2000000c = 0; *(uint8_t*)0x2000000d = 0; *(uint8_t*)0x2000000e = 0; *(uint8_t*)0x2000000f = 0; *(uint8_t*)0x20000010 = 0; *(uint8_t*)0x20000011 = 0; *(uint8_t*)0x20000012 = -1; *(uint8_t*)0x20000013 = -1; *(uint32_t*)0x20000014 = htobe32(0x7f000001); *(uint32_t*)0x20000018 = 0; syscall(__NR_connect, r[0], 0x20000000, 0x1c); *(uint8_t*)0x20000080 = 0xfe; *(uint8_t*)0x20000081 = 0x80; *(uint8_t*)0x20000082 = 0; *(uint8_t*)0x20000083 = 0; *(uint8_t*)0x20000084 = 0; *(uint8_t*)0x20000085 = 0; *(uint8_t*)0x20000086 = 0; *(uint8_t*)0x20000087 = 0; *(uint8_t*)0x20000088 = 0; *(uint8_t*)0x20000089 = 0; *(uint8_t*)0x2000008a = 0; *(uint8_t*)0x2000008b = 0; *(uint8_t*)0x2000008c = 0; *(uint8_t*)0x2000008d = 0; *(uint8_t*)0x2000008e = 0; *(uint8_t*)0x2000008f = 0xbb; *(uint64_t*)0x20000090 = htobe64(0); *(uint64_t*)0x20000098 = htobe64(1); *(uint16_t*)0x200000a0 = htobe16(0x4e20); *(uint16_t*)0x200000a2 = htobe16(0); *(uint16_t*)0x200000a4 = htobe16(0x4e20); *(uint16_t*)0x200000a6 = htobe16(0); *(uint16_t*)0x200000a8 = 2; *(uint8_t*)0x200000aa = 0; *(uint8_t*)0x200000ab = 0; *(uint8_t*)0x200000ac = 0; *(uint32_t*)0x200000b0 = 0; *(uint32_t*)0x200000b4 = 0; *(uint64_t*)0x200000b8 = 0; *(uint64_t*)0x200000c0 = 0; *(uint64_t*)0x200000c8 = 2; *(uint64_t*)0x200000d0 = 0; *(uint64_t*)0x200000d8 = 0x100000000; *(uint64_t*)0x200000e0 = 0; *(uint64_t*)0x200000e8 = 0; *(uint64_t*)0x200000f0 = 0; *(uint64_t*)0x200000f8 = 0; *(uint64_t*)0x20000100 = 0; *(uint64_t*)0x20000108 = 0; *(uint64_t*)0x20000110 = 0; *(uint32_t*)0x20000118 = 0; *(uint32_t*)0x2000011c = 0; *(uint8_t*)0x20000120 = 1; *(uint8_t*)0x20000121 = 0; *(uint8_t*)0x20000122 = 0; *(uint8_t*)0x20000123 = 0; *(uint8_t*)0x20000128 = 0xac; *(uint8_t*)0x20000129 = 0x14; *(uint8_t*)0x2000012a = 0x14; *(uint8_t*)0x2000012b = 0; *(uint32_t*)0x20000138 = htobe32(0); *(uint8_t*)0x2000013c = 0x2b; *(uint16_t*)0x20000140 = 0xa; *(uint32_t*)0x20000144 = htobe32(0xe0000001); *(uint32_t*)0x20000154 = 0; *(uint8_t*)0x20000158 = -1; *(uint8_t*)0x20000159 = 0; *(uint8_t*)0x2000015a = 1; *(uint32_t*)0x2000015c = 0; *(uint32_t*)0x20000160 = 0; *(uint32_t*)0x20000164 = 0; syscall(__NR_setsockopt, r[0], 0x29, 0x23, 0x20000080, 0xe8); *(uint64_t*)0x20000580 = 0; *(uint32_t*)0x20000588 = 0; *(uint64_t*)0x20000590 = 0x200026c0; *(uint64_t*)0x20000598 = 0; *(uint64_t*)0x200005a0 = 0x20002780; *(uint64_t*)0x200005a8 = 0; *(uint32_t*)0x200005b0 = 0; syscall(__NR_sendmsg, r[0], 0x20000580, 0); *(uint8_t*)0x20000040 = 0xaa; *(uint8_t*)0x20000041 = 0xaa; *(uint8_t*)0x20000042 = 0xaa; *(uint8_t*)0x20000043 = 0xaa; *(uint8_t*)0x20000044 = 0xaa; *(uint8_t*)0x20000045 = 0x19; *(uint8_t*)0x20000046 = 0; *(uint8_t*)0x20000047 = 0; *(uint8_t*)0x20000048 = 0; *(uint8_t*)0x20000049 = 0; *(uint8_t*)0x2000004a = 0; *(uint8_t*)0x2000004b = 0; *(uint16_t*)0x2000004c = htobe16(0x800); STORE_BY_BITMASK(uint8_t, 0x2000004e, 5, 0, 4); STORE_BY_BITMASK(uint8_t, 0x2000004e, 4, 4, 4); STORE_BY_BITMASK(uint8_t, 0x2000004f, 0, 0, 2); STORE_BY_BITMASK(uint8_t, 0x2000004f, 0, 2, 6); *(uint16_t*)0x20000050 = htobe16(0x1c); *(uint16_t*)0x20000052 = htobe16(0); *(uint16_t*)0x20000054 = htobe16(-1); *(uint8_t*)0x20000056 = 0; *(uint8_t*)0x20000057 = 0x89; *(uint16_t*)0x20000058 = 0; *(uint8_t*)0x2000005a = 0xac; *(uint8_t*)0x2000005b = 0x14; *(uint8_t*)0x2000005c = 0x14; *(uint8_t*)0x2000005d = 0; *(uint8_t*)0x2000005e = 0xac; *(uint8_t*)0x2000005f = 0x14; *(uint8_t*)0x20000060 = 0x14; *(uint8_t*)0x20000061 = 0xbb; *(uint16_t*)0x20000062 = htobe16(0x4e20); *(uint16_t*)0x20000064 = htobe16(0x4e20); *(uint16_t*)0x20000066 = htobe16(8); *(uint16_t*)0x20000068 = 0; *(uint32_t*)0x20000000 = 0; *(uint32_t*)0x20000004 = 2; *(uint32_t*)0x20000008 = 0; *(uint32_t*)0x2000000c = 0; *(uint32_t*)0x20000010 = 0x80; *(uint32_t*)0x20000014 = 0; struct csum_inet csum_1; csum_inet_init(&csum_1); csum_inet_update(&csum_1, (const uint8_t*)0x2000005a, 4); csum_inet_update(&csum_1, (const uint8_t*)0x2000005e, 4); uint16_t csum_1_chunk_2 = 0x1100; csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 2); uint16_t csum_1_chunk_3 = 0x800; csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 2); csum_inet_update(&csum_1, (const uint8_t*)0x20000062, 8); *(uint16_t*)0x20000068 = csum_inet_digest(&csum_1); struct csum_inet csum_2; csum_inet_init(&csum_2); csum_inet_update(&csum_2, (const uint8_t*)0x2000004e, 20); *(uint16_t*)0x20000058 = csum_inet_digest(&csum_2); } int main() { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); loop(); return 0; }