// https://syzkaller.appspot.com/bug?id=be77af8f4170f3350bed40f1b060851541287f2f // 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; } #ifndef __NR_connect #define __NR_connect 362 #endif #ifndef __NR_write #define __NR_write 4 #endif #ifndef __NR_mmap #define __NR_mmap 192 #endif #ifndef __NR_socket #define __NR_socket 359 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 long r[2]; void loop() { memset(r, -1, sizeof(r)); syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0); r[0] = syscall(__NR_socket, 0xa, 2, 0); *(uint16_t*)0x20e6f000 = 0xa; *(uint16_t*)0x20e6f002 = htobe16(0x4e22); *(uint32_t*)0x20e6f004 = 0; *(uint8_t*)0x20e6f008 = 0; *(uint8_t*)0x20e6f009 = 0; *(uint8_t*)0x20e6f00a = 0; *(uint8_t*)0x20e6f00b = 0; *(uint8_t*)0x20e6f00c = 0; *(uint8_t*)0x20e6f00d = 0; *(uint8_t*)0x20e6f00e = 0; *(uint8_t*)0x20e6f00f = 0; *(uint8_t*)0x20e6f010 = 0; *(uint8_t*)0x20e6f011 = 0; *(uint8_t*)0x20e6f012 = -1; *(uint8_t*)0x20e6f013 = -1; *(uint8_t*)0x20e6f014 = 0xac; *(uint8_t*)0x20e6f015 = 0x14; *(uint8_t*)0x20e6f016 = 0; *(uint8_t*)0x20e6f017 = 0xaa; *(uint32_t*)0x20e6f018 = 1; syscall(__NR_connect, r[0], 0x20e6f000, 0x1c); *(uint16_t*)0x20d94fe4 = 0xa; *(uint16_t*)0x20d94fe6 = htobe16(0x4e20); *(uint32_t*)0x20d94fe8 = 4; *(uint8_t*)0x20d94fec = 0xfe; *(uint8_t*)0x20d94fed = 0x80; *(uint8_t*)0x20d94fee = 0; *(uint8_t*)0x20d94fef = 0; *(uint8_t*)0x20d94ff0 = 0; *(uint8_t*)0x20d94ff1 = 0; *(uint8_t*)0x20d94ff2 = 0; *(uint8_t*)0x20d94ff3 = 0; *(uint8_t*)0x20d94ff4 = 0; *(uint8_t*)0x20d94ff5 = 0; *(uint8_t*)0x20d94ff6 = 0; *(uint8_t*)0x20d94ff7 = 0; *(uint8_t*)0x20d94ff8 = 0; *(uint8_t*)0x20d94ff9 = 0; *(uint8_t*)0x20d94ffa = 0; *(uint8_t*)0x20d94ffb = 0xaa; *(uint32_t*)0x20d94ffc = 9; syscall(__NR_connect, r[0], 0x20d94fe4, 0x1c); r[1] = syscall(__NR_socket, 0x18, 1, 1); *(uint16_t*)0x205fafd2 = 0x18; *(uint32_t*)0x205fafd4 = 1; *(uint32_t*)0x205fafd8 = 0; *(uint32_t*)0x205fafdc = r[0]; *(uint16_t*)0x205fafe0 = 2; *(uint16_t*)0x205fafe2 = htobe16(0x4e21); *(uint32_t*)0x205fafe4 = htobe32(0xe0000002); *(uint8_t*)0x205fafe8 = 0; *(uint8_t*)0x205fafe9 = 0; *(uint8_t*)0x205fafea = 0; *(uint8_t*)0x205fafeb = 0; *(uint8_t*)0x205fafec = 0; *(uint8_t*)0x205fafed = 0; *(uint8_t*)0x205fafee = 0; *(uint8_t*)0x205fafef = 0; *(uint32_t*)0x205faff0 = 4; *(uint32_t*)0x205faff4 = 0; *(uint32_t*)0x205faff8 = 2; *(uint32_t*)0x205faffc = 0; syscall(__NR_connect, r[1], 0x205fafd2, 0x2e); memcpy((void*)0x20147fd6, "system_u:object_r:klogd_var_run_t:s0", 36); *(uint8_t*)0x20147ffa = 0x20; memcpy((void*)0x20147ffb, "root", 5); syscall(__NR_write, r[1], 0x20147fd6, 0x2a); *(uint8_t*)0x201a7000 = -1; *(uint8_t*)0x201a7001 = -1; *(uint8_t*)0x201a7002 = -1; *(uint8_t*)0x201a7003 = -1; *(uint8_t*)0x201a7004 = -1; *(uint8_t*)0x201a7005 = -1; *(uint8_t*)0x201a7006 = 0xaa; *(uint8_t*)0x201a7007 = 0xaa; *(uint8_t*)0x201a7008 = 0xaa; *(uint8_t*)0x201a7009 = 0xaa; *(uint8_t*)0x201a700a = 0; *(uint8_t*)0x201a700b = 0xaa; *(uint16_t*)0x201a700c = htobe16(0x800); STORE_BY_BITMASK(uint8_t, 0x201a700e, 5, 0, 4); STORE_BY_BITMASK(uint8_t, 0x201a700e, 4, 4, 4); STORE_BY_BITMASK(uint8_t, 0x201a700f, 0, 0, 2); STORE_BY_BITMASK(uint8_t, 0x201a700f, 0, 2, 6); *(uint16_t*)0x201a7010 = htobe16(0x24); *(uint16_t*)0x201a7012 = 0; *(uint16_t*)0x201a7014 = htobe16(0); *(uint8_t*)0x201a7016 = 0; *(uint8_t*)0x201a7017 = 0x29; *(uint16_t*)0x201a7018 = 0; *(uint32_t*)0x201a701a = htobe32(0); *(uint32_t*)0x201a701e = htobe32(-1); *(uint16_t*)0x201a7022 = 0; *(uint16_t*)0x201a7024 = 0; *(uint8_t*)0x201a7026 = 4; STORE_BY_BITMASK(uint8_t, 0x201a7027, 1, 0, 4); STORE_BY_BITMASK(uint8_t, 0x201a7027, 0, 4, 4); *(uint16_t*)0x201a7028 = 0; STORE_BY_BITMASK(uint8_t, 0x201a702a, 0, 0, 1); STORE_BY_BITMASK(uint8_t, 0x201a702a, 0, 1, 4); STORE_BY_BITMASK(uint8_t, 0x201a702a, 0, 5, 3); memcpy((void*)0x201a702b, "\x93\x40\xbf", 3); *(uint8_t*)0x201a702e = 0; memcpy((void*)0x201a702f, "\x28\xe1\xae", 3); *(uint32_t*)0x2049b000 = 0; *(uint32_t*)0x2049b004 = 1; *(uint32_t*)0x2049b008 = 0; struct csum_inet csum_1; csum_inet_init(&csum_1); csum_inet_update(&csum_1, (const uint8_t*)0x201a701a, 4); csum_inet_update(&csum_1, (const uint8_t*)0x201a701e, 4); uint16_t csum_1_chunk_2 = 0x2100; csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 2); uint16_t csum_1_chunk_3 = 0x1000; csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 2); csum_inet_update(&csum_1, (const uint8_t*)0x201a7022, 16); *(uint16_t*)0x201a7028 = csum_inet_digest(&csum_1); struct csum_inet csum_2; csum_inet_init(&csum_2); csum_inet_update(&csum_2, (const uint8_t*)0x201a700e, 20); *(uint16_t*)0x201a7018 = csum_inet_digest(&csum_2); } int main() { loop(); return 0; }