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[CLANG18] MSAN: use-of-uninitialized-value in lib_enc/ivas_cpe_enc_fx.c:916:17

Basic Info

Bug description

Clang 18 MSAN found an use-of-uninitialized-value error at lib_enc/ivas_cpe_enc_fx.c:916:17:

==19961==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x55782804e143 in ivas_cpe_enc_fx /builds/rep/sa4/audio/ivas-basop/lib_enc/ivas_cpe_enc_fx.c:916:17
#1 0x557827645603 in ivas_enc_fx /builds/rep/sa4/audio/ivas-basop/lib_enc/ivas_enc_fx.c:180:9
#2 0x5578274f9675 in IVAS_ENC_EncodeFrameToSerial /builds/rep/sa4/audio/ivas-basop/lib_enc/lib_enc_fx.c:1502:13
#3 0x5578274d894a in main /builds/rep/sa4/audio/ivas-basop/apps/encoder.c:877:28
#4 0x7f136a78c1c9 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#5 0x7f136a78c28a in __libc_start_main csu/../csu/libc-start.c:360:3
#6 0x557827438454 in _start (/builds/rep/sa4/audio/ivas-basop/IVAS_cod+0x38454) (BuildId: 8fd000be54ac410bba001621c9b72a8d8aed4cf6)

SUMMARY: MemorySanitizer: use-of-uninitialized-value /builds/rep/sa4/audio/ivas-basop/lib_enc/ivas_cpe_enc_fx.c:916:17 in ivas_cpe_enc_fx

How to reproduce

⚠️ Make sure to use CLANG v18 for building the codec :warning

Build with

make clean
make -j CLANG=1

Then run

IVAS_cod -stereo 128000 16 scripts/testv/stvST16c.wav stvST16c.wav_stereo_at_128_kbps_16kHz_in_16kHz_out_random_FER_at_10_.192

or

python3 -m pytest "test_param_file_tests[stv-stereo at 128 kbps, 16kHz in, 16kHz out, random FER at 10%]" -n auto --update_ref --ref_encoder_path ./IVAS_cod --ref_decoder_path ./IVAS_dec