// https://syzkaller.appspot.com/bug?id=5388824c1e18a045263859c865be0409bc5459bf // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #ifndef __NR_ioctl #define __NR_ioctl 29 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_sendmsg #define __NR_sendmsg 211 #endif #ifndef __NR_socket #define __NR_socket 198 #endif #ifndef __NR_socketpair #define __NR_socketpair 199 #endif #define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \ *(type*)(addr) = \ htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \ (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); intptr_t res = 0; res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0); if (res != -1) r[0] = res; res = syscall(__NR_socketpair, /*domain=*/1ul, /*type=*/1ul, /*proto=*/0, /*fds=*/0x20000080ul); if (res != -1) r[1] = *(uint32_t*)0x20000084; memcpy((void*)0x20000000, "lo\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16); res = syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8933, /*arg=*/0x20000000ul); if (res != -1) r[2] = *(uint32_t*)0x20000010; *(uint64_t*)0x20000040 = 0; *(uint32_t*)0x20000048 = 0; *(uint64_t*)0x20000050 = 0x20000780; *(uint64_t*)0x20000780 = 0x20002b00; *(uint32_t*)0x20002b00 = 0x88; *(uint16_t*)0x20002b04 = 0x24; *(uint16_t*)0x20002b06 = 0xf0b; *(uint32_t*)0x20002b08 = 0; *(uint32_t*)0x20002b0c = 0; *(uint8_t*)0x20002b10 = 0x60; *(uint8_t*)0x20002b11 = 0; *(uint16_t*)0x20002b12 = 0; *(uint32_t*)0x20002b14 = r[2]; *(uint16_t*)0x20002b18 = 0; *(uint16_t*)0x20002b1a = 0; *(uint16_t*)0x20002b1c = -1; *(uint16_t*)0x20002b1e = -1; *(uint16_t*)0x20002b20 = 0; *(uint16_t*)0x20002b22 = 0; *(uint16_t*)0x20002b24 = 0xa; *(uint16_t*)0x20002b26 = 1; memcpy((void*)0x20002b28, "netem\000", 6); *(uint16_t*)0x20002b30 = 0x58; *(uint16_t*)0x20002b32 = 2; *(uint32_t*)0x20002b34 = 0; *(uint32_t*)0x20002b38 = 0; *(uint32_t*)0x20002b3c = 0; *(uint32_t*)0x20002b40 = 0; *(uint32_t*)0x20002b44 = 0; *(uint32_t*)0x20002b48 = 0; *(uint16_t*)0x20002b4c = 4; STORE_BY_BITMASK(uint16_t, , 0x20002b4e, 5, 0, 14); STORE_BY_BITMASK(uint16_t, , 0x20002b4f, 0, 6, 1); STORE_BY_BITMASK(uint16_t, , 0x20002b4f, 1, 7, 1); *(uint16_t*)0x20002b50 = 0x18; *(uint16_t*)0x20002b52 = 1; *(uint32_t*)0x20002b54 = 0; *(uint32_t*)0x20002b58 = 0; *(uint32_t*)0x20002b5c = 0; *(uint32_t*)0x20002b60 = 0; *(uint32_t*)0x20002b64 = 0; *(uint16_t*)0x20002b68 = 0x14; *(uint16_t*)0x20002b6a = 2; *(uint32_t*)0x20002b6c = 0; *(uint32_t*)0x20002b70 = 0; *(uint32_t*)0x20002b74 = 0; *(uint32_t*)0x20002b78 = 0; *(uint16_t*)0x20002b7c = 0xa; *(uint16_t*)0x20002b7e = 2; memcpy((void*)0x20002b80, "\x72\xf4\x2d\x1a\xf2\x5d", 6); *(uint64_t*)0x20000788 = 0x88; *(uint64_t*)0x20000058 = 1; *(uint64_t*)0x20000060 = 0; *(uint64_t*)0x20000068 = 0; *(uint32_t*)0x20000070 = 0; syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x20000040ul, /*f=*/0ul); return 0; }