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fix: add overflow guard in mpack_growable_writer_flush resize loop

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This commit is contained in:
ma-moon 2026-05-02 22:33:12 +08:00
parent c624833cfb
commit baa4c5b836
1 changed files with 8 additions and 2 deletions
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10
3rd/msgpack/src/mpack.c
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@ -1164,10 +1164,16 @@ static void mpack_growable_writer_flush(mpack_writer_t* writer, const char* data
(int)count, (int)mpack_writer_buffer_left(writer), (int)used, (int)size);
// grow to fit the data
// TODO: this really needs to correctly test for overflow
// overflow-guarded resize
if (size > SIZE_MAX / 2) {
mpack_writer_flag_error(writer, mpack_error_memory);
return;
}
size_t new_size = size * 2;
while (new_size < used + count)
while (new_size < used + count) {
if (new_size > SIZE_MAX / 2) break;
new_size *= 2;
}
mpack_log("flush growing buffer size from %i to %i\n", (int)size, (int)new_size);