[vlc-commits] [Git][videolan/vlc][3.0.x] real: fix FPE

[Steve Lhomme (@robUx4)]

Steve Lhomme pushed to branch 3.0.x at VideoLAN / VLC


Commits:
3f8a631f by Thomas Guillem at 2026-03-13T09:49:03+00:00
real: fix FPE

```
=================================================================
==1032361==ERROR: AddressSanitizer: FPE on unknown address 0x7f8748be4896 (pc 0x7f8748be4896 bp 0x7ffd6ee29ce0 sp 0x7ffd6ee29c80 T0)
    #0 0x7f8748be4896 in DemuxAudioMethod1 ../../modules/demux/real.c:700
    #1 0x7f8748be5894 in DemuxAudio ../../modules/demux/real.c:912
    #2 0x7f8748be6cb9 in Demux ../../modules/demux/real.c:355
    #3 0x55e6d08ff409 in demux_Demux ../../include/vlc_demux.h:354
    #4 0x55e6d08ff409 in demux_process_stream ../../test/src/input/demux-run.c:284
    #5 0x55e6d08ff6ba in vlc_demux_process_url ../../test/src/input/demux-run.c:326
    #6 0x55e6d08ff759 in vlc_demux_process_path ../../test/src/input/demux-run.c:340
    #7 0x55e6d08fe549 in main ../../test/vlc-demux-run.c:50
    #8 0x7f8749634ca7 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
    #9 0x7f8749634d64 in __libc_start_main_impl ../csu/libc-start.c:360
    #10 0x55e6d08fe350 in _start (/home/tom/work/git/vlc-3.0/build-asan/test/vlc-demux-dec-run+0x2350) (BuildId: 3a877603d00fd3ec7dfb4d665218763348d05e8d)
```

- - - - -


1 changed file:

- modules/demux/real.c


Changes:

=====================================
modules/demux/real.c
=====================================
@@ -697,7 +697,8 @@ static void DemuxAudioMethod1( demux_t *p_demux, real_track_t *tk, vlc_tick_t i_
     }
     else
     {
-        const int y = tk->i_subpacket / (tk->i_subpacket_h / 2);
+        const int y = tk->i_subpacket_h > 0 ?
+                      tk->i_subpacket / (tk->i_subpacket_h / 2) : 0;
         assert( tk->fmt.i_codec == VLC_CODEC_RA_288 );
 
         for( int i = 0; i < tk->i_subpacket_h / 2; i++ )



View it on GitLab: https://code.videolan.org/videolan/vlc/-/commit/3f8a631f4e47ec8343cef6e9c4d114c4b141fb23

-- 
View it on GitLab: https://code.videolan.org/videolan/vlc/-/commit/3f8a631f4e47ec8343cef6e9c4d114c4b141fb23
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