liblzma: Verify the filter chain in threaded encoder initialization.
This way an invalid filter chain is detected at the Stream
encoder initialization instead of delaying it to the first
call to lzma_code() which triggers the initialization of
the actual filter encoder(s).
diff --git a/src/liblzma/common/stream_encoder_mt.c b/src/liblzma/common/stream_encoder_mt.c
index 6188507..9780ed0 100644
--- a/src/liblzma/common/stream_encoder_mt.c
+++ b/src/liblzma/common/stream_encoder_mt.c
@@ -947,9 +947,12 @@
return LZMA_MEM_ERROR;
#endif
- // FIXME TODO: Validate the filter chain so that we can give
- // an error in this function instead of delaying it to the first
- // call to lzma_code().
+ // Validate the filter chain so that we can give an error in this
+ // function instead of delaying it to the first call to lzma_code().
+ // The memory usage calculation verifies the filter chain as
+ // a side effect so we take advatange of that.
+ if (lzma_raw_encoder_memusage(filters) == UINT64_MAX)
+ return LZMA_OPTIONS_ERROR;
// Validate the Check ID.
if ((unsigned int)(options->check) > LZMA_CHECK_ID_MAX)
