commit cbaf0c049c8a73a7bbd2e8bf574589f84f99ccd8 Author: teor teor2345@gmail.com Date: Fri Jun 16 09:47:32 2017 +1000

Return TOR_COMPRESS_BUFFER_FULL when zstd has additional input

Fixes #22628. --- src/common/compress_zstd.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/common/compress_zstd.c b/src/common/compress_zstd.c index 11fcf86..a136db4 100644 --- a/src/common/compress_zstd.c +++ b/src/common/compress_zstd.c @@ -340,8 +340,20 @@ tor_zstd_compress_process(tor_zstd_compress_state_t *state, return TOR_COMPRESS_BUFFER_FULL;

return TOR_COMPRESS_DONE; - } else { - return (retval == 0) ? TOR_COMPRESS_DONE : TOR_COMPRESS_OK; + } else /* if (!state->compress) */ { + // ZSTD_decompressStream returns 0 if the frame is done, or >0 if it + // is incomplete. + // We check this above. + tor_assert_nonfatal(!ZSTD_isError(retval)); + // Start a new frame if this frame is done + if (retval == 0) + return TOR_COMPRESS_DONE; + // Don't check out_len, it might have some space left if the next output + // chunk is larger than the remaining space + else if (*in_len > 0) + return TOR_COMPRESS_BUFFER_FULL; + else + return TOR_COMPRESS_OK; }

#else // HAVE_ZSTD.