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fix: eight memcpy operations in uvwasi components co... in fd_table.c #62531

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fix: eight memcpy operations in uvwasi components co... in fd_table.c #62531

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6 changes: 6 additions & 0 deletions deps/uvwasi/src/fd_table.c
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,12 @@ uvwasi_errno_t uvwasi_fd_table_insert(uvwasi_t* uvwasi,
if (type != UVWASI_FILETYPE_SOCKET_STREAM) {
mp_len = strlen(mapped_path);
rp_len = strlen(real_path);
/* Validate path lengths to prevent integer overflow in the allocation
size calculation below and to bound the memcpy operations. WASI paths
are limited to 65535 bytes, which is far beyond any practical path
length and safely avoids overflow in: mp_len + mp_len + rp_len + 3. */
if (mp_len > 65535 || rp_len > 65535)
return UVWASI_ENAMETOOLONG;
} else {
mp_len = 0;
rp_len = 0;
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