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fix(sock_recv/send): allow size of 0 #4959

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fix(sock_recv/send): allow size of 0 #4959

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ba9a5e9
fix(sock_recv/send): allow size of 0
syborg64 Jun 2, 2026
cb7e89c
chore: format
syborg64 Jun 2, 2026
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11 changes: 2 additions & 9 deletions core/iwasm/libraries/libc-wasi/libc_wasi_wrapper.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2009,10 +2009,6 @@ allocate_iovec_app_buffer(wasm_module_inst_t module_inst,
uint32 i;
uint8 *buf_begin = NULL;

if (data_len == 0) {
return __WASI_EINVAL;
}

total_size = sizeof(iovec_app_t) * (uint64)data_len;
if (total_size >= UINT32_MAX
|| !validate_native_addr((void *)data, total_size))
Expand All @@ -2022,12 +2018,9 @@ allocate_iovec_app_buffer(wasm_module_inst_t module_inst,
total_size += data->buf_len;
}

if (total_size == 0) {
return __WASI_EINVAL;
}

if (total_size >= UINT32_MAX
|| !(buf_begin = wasm_runtime_malloc((uint32)total_size))) {
|| !(buf_begin =
wasm_runtime_malloc(total_size ? (uint32)total_size : 1))) {
return __WASI_ENOMEM;
}

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