Skip to content

[CLANG18] MSAN: use-of-uninitialized-value in lib_enc/ivas_dirac_enc_fx.c:1590:30

Basic Info

Bug description

Clang 18 MSAN found an use-of-uninitialized-value error at lib_enc/ivas_dirac_enc_fx.c:1590:30:

==20024==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x55dddacaf463 in computeDiffuseness_mdft_fx /builds/rep/sa4/audio/ivas-basop/lib_enc/ivas_dirac_enc_fx.c:1590:30
#1 0x55dddac9d596 in ivas_dirac_param_est_enc_fx /builds/rep/sa4/audio/ivas-basop/lib_enc/ivas_dirac_enc_fx.c:1217:13
#2 0x55dddac92932 in ivas_dirac_enc_fx /builds/rep/sa4/audio/ivas-basop/lib_enc/ivas_dirac_enc_fx.c:347:5
#3 0x55ddda4c42f7 in ivas_spar_enc_process_fx /builds/rep/sa4/audio/ivas-basop/lib_enc/ivas_spar_encoder_fx.c:865:5
#4 0x55ddda4bf336 in ivas_spar_enc_fx /builds/rep/sa4/audio/ivas-basop/lib_enc/ivas_spar_encoder_fx.c:403:5
#5 0x55ddda26e1d7 in ivas_enc_fx /builds/rep/sa4/audio/ivas-basop/lib_enc/ivas_enc_fx.c:263:13
#6 0x55ddda120675 in IVAS_ENC_EncodeFrameToSerial /builds/rep/sa4/audio/ivas-basop/lib_enc/lib_enc_fx.c:1502:13
#7 0x55ddda0ff94a in main /builds/rep/sa4/audio/ivas-basop/apps/encoder.c:877:28
#8 0x7fec8f9f31c9 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#9 0x7fec8f9f328a in __libc_start_main csu/../csu/libc-start.c:360:3
#10 0x55ddda05f454 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_dirac_enc_fx.c:1590:30 in computeDiffuseness_mdft_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 -max_band scripts/testv/ivas_bws_20fr_start_WB.txt -sba 2 384000 32 scripts/testv/stv2OA32c.wav stv2OA32c.wav_SBA_2OA_at_384_kbps_32kHz_in_32kHz_out_STEREO_out_bandwidth_switching.192

or

python3 -m pytest "test_param_file_tests[stv-SBA 2OA at 384 kbps, 32kHz in, 32kHz out, STEREO out, bandwidth switching]" -n auto --update_ref --ref_encoder_path ./IVAS_cod --ref_decoder_path ./IVAS_dec