mpv *might* segfaults when playing DVD

Important Information

Provide following Information:

• mpv version: 0.34.1
• macOS Version: 12.2
• Source of the mpv binary or bundle: MacPorts

If you're not using git master or the latest release, update.
Releases are listed here: https://github.com/mpv-player/mpv/releases

Reproduction steps

Open a DVD with mpv: mpv /Volumes/SomeDVD
Wait for it to load, it might crash.

Expected behavior

Plays video normally

Actual behavior

There's a chance mpv could crash, either segfault (11) or abort (6). Both backtraces are attached. Could be a libdvd* problem.

Log file

Console log:

[cplayer] Command line options: '-v' '/Volumes/RWBY_4/'
[cplayer] mpv 0.34.1 Copyright © 2000-2021 mpv/MPlayer/mplayer2 projects
[cplayer]  built on Tue Jan  4 21:55:08 EST 2022
[cplayer] FFmpeg library versions:
[cplayer]    libavutil       56.70.100
[cplayer]    libavcodec      58.134.100
[cplayer]    libavformat     58.76.100
[cplayer]    libswscale      5.9.100
[cplayer]    libavfilter     7.110.100
[cplayer]    libswresample   3.9.100
[cplayer] FFmpeg version: 4.4.1
[cplayer] 
[cplayer] Configuration: ./waf configure --prefix=/opt/local --enable-manpage-build --enable-coreaudio --enable-cocoa --enable-cplugins --enable-zlib --enable-swift --disable-html-build --disable-cuda-hwaccel --disable-opensles --disable-egl-drm --disable-egl-angle-lib --disable-egl-angle-win32 --disable-audiounit --disable-ios-gl --disable-direct3d --disable-android --disable-rpi --disable-dvbin --disable-caca --enable-cdda --disable-clang-database --disable-debug-build --enable-dvdnav --disable-egl-x11 --enable-gl --enable-gl-cocoa --disable-gl-x11 --disable-jack --disable-javascript --disable-jpeg --enable-libarchive --disable-openal --disable-pdf-build --disable-pulse --enable-rubberband --disable-test --disable-tv --disable-uchardet --disable-vapoursynth --disable-x11 --disable-xv --enable-videotoolbox-gl --enable-lua --lua=52fbsd
[cplayer] List of enabled features: 52fbsd asm bsd-fstatfs build-date cdda cocoa coreaudio cplayer cplugins dvdnav ffmpeg ffmpeg-aviocontext-bytes-read gl gl-cocoa glob glob-posix gpl iconv lcms2 libarchive libass libavdevice libbluray libdl libm lua macos-10-11-features macos-10-12-2-features macos-10-14-features macos-cocoa-cb macos-media-player macos-touchbar optimize osx-thread-name posix posix-or-mingw pthreads rubberband stdatomic swift vector videotoolbox-gl videotoolbox-hwaccel zimg zlib
[cplayer] Reading config file /opt/local/etc/mpv/encoding-profiles.conf
[cplayer] Applying profile 'default'...
[cplayer] Reading config file /Users/Admin/.config/mpv/mpv.conf
[cplayer] Applying profile 'default'...
[cplayer] Setting option 'sub-auto' = 'fuzzy' (flags = 4)
[cplayer] Setting option 'override-display-fps' = '60' (flags = 4)
[cplayer] Setting option 'screenshot-template' = '~/Desktop/mpv-screenshot-%f-%p' (flags = 4)
[cplayer] Setting option 'screenshot-format' = 'png' (flags = 4)
[cplayer] Setting option 'autofit-larger' = '100%' (flags = 4)
[cplayer] Setting option 'volume' = '80' (flags = 4)
[cplayer] Setting option 'idle' = 'yes' (flags = 4)
[cplayer] Setting option 'hwdec' = 'auto' (flags = 4)
[cplayer] Setting option 'osd-font' = 'PingFang SC' (flags = 4)
[cplayer] Setting option 'v' = '' (flags = 8)
[ifo_dvdnav] Opening /opt/local/etc/mpv/input.conf
[bdmv/bluray] Opening /opt/local/etc/mpv/input.conf
[file] Opening /opt/local/etc/mpv/input.conf
[input] Parsing input config file /opt/local/etc/mpv/input.conf
[input] Input config file /opt/local/etc/mpv/input.conf parsed: 0 binds
[ifo_dvdnav] Opening /Users/Admin/.config/mpv/input.conf
[bdmv/bluray] Opening /Users/Admin/.config/mpv/input.conf
[file] Opening /Users/Admin/.config/mpv/input.conf
[input] Parsing input config file /Users/Admin/.config/mpv/input.conf
[input] Input config file /Users/Admin/.config/mpv/input.conf parsed: 2 binds
[osx/cocoacb] Created CGL pixel format with attributes: kCGLPFAOpenGLProfile, kCGLOGLPVersion_3_2_Core, kCGLPFAAccelerated, kCGLPFADoubleBuffer, kCGLPFAColorSize, 64, kCGLPFAColorFloat, kCGLPFABackingStore, kCGLPFAAllowOfflineRenderers, kCGLPFASupportsAutomaticGraphicsSwitching, 0
[libmpv_render] GL_VERSION='4.1 ATI-4.7.103'
[libmpv_render] Detected desktop OpenGL 4.1.
[libmpv_render] GL_VENDOR='ATI Technologies Inc.'
[libmpv_render] GL_RENDERER='AMD Radeon RX 6800 XT OpenGL Engine'
[libmpv_render] GL_SHADING_LANGUAGE_VERSION='4.10'
[libmpv_render] Loaded extension GL_APPLE_rgb_422.
[libmpv_render] GL_*_swap_control extension missing.
[libmpv_render] Testing FBO format rgba16f
[libmpv_render] Using FBO format rgba16f.
[libmpv_render] Disabling HDR peak computation (one or more of the following is not supported: compute shaders=0, SSBO=0).
[libmpv_render] No advanced processing required. Enabling dumb mode.
[libmpv_render] Loading hwdec driver 'videotoolbox'
[cplayer] Waiting for scripts...
[osd/libass] libass API version: 0x1502000
[osd/libass] libass source: tarball: 0.15.2
[osd/libass] Shaper: FriBidi 1.0.11 (SIMPLE) HarfBuzz-ng 3.4.0 (COMPLEX)
[osd/libass] Setting up fonts...
[osd/libass] Using font provider coretext
[osd/libass] Done.
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Done loading scripts.
[cplayer] Running hook: ytdl_hook/on_load
[ytdl_hook] ytdl:// hook 
[ytdl_hook] not a ytdl:// url 
[ifo_dvdnav] Opening /Volumes/RWBY_4/
[ifo_dvdnav] .IFO detected. Redirecting to dvd://
[cplayer] Set property: shared-script-properties -> 1
[osd/libass] libass API version: 0x1502000
[osd/libass] libass source: tarball: 0.15.2
libdvdread: Attempting to use device /dev/rdisk13 mounted on /Volumes/RWBY_4 for CSS authentication
[osd/libass] Shaper: FriBidi 1.0.11 (SIMPLE) HarfBuzz-ng 3.4.0 (COMPLEX)
[osd/libass] Setting up fonts...
[osd/libass] Using font provider coretext
[osd/libass] Done.
[cplayer] Set property: shared-script-properties -> 1
[cplayer] Set property: shared-script-properties -> 1
libdvdnav: Can't read name block. Probably not a DVD-ROM device.
libdvdnav: vm: dvd_read_name failed
libdvdnav: DVD disk reports itself with Region mask 0x00400000. Regions: 01 02 03 04 05 06 08
libdvdread: Attempting to retrieve all CSS keys
libdvdread: This can take a _long_ time, please be patient
libdvdread: Get key for /VIDEO_TS/VIDEO_TS.VOB at 0x00000132
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_0.VOB at 0x00000180
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_01_1.VOB at 0x0001b048
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_02_0.VOB at 0x0001ec46
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_02_1.VOB at 0x0001ec7f
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_03_0.VOB at 0x003a5bce
libdvdread: Elapsed time 0
libdvdread: Get key for /VIDEO_TS/VTS_03_1.VOB at 0x003a5c07
libdvdread: Elapsed time 0
libdvdread: Found 3 VTS's
libdvdread: Elapsed time 0
[ifo_dvdnav] List of available titles:
[ifo_dvdnav] title:   0 duration: 00:00:50
[ifo_dvdnav] title:   1 duration: 03:16:09
[ifo_dvdnav] title:   2 duration: 03:08:21
[ifo_dvdnav] title:   3 duration: 00:19:40
[ifo_dvdnav] title:   4 duration: 00:14:12
[ifo_dvdnav] title:   5 duration: 00:18:14
[ifo_dvdnav] title:   6 duration: 00:16:17
[ifo_dvdnav] title:   7 duration: 00:12:30
[ifo_dvdnav] title:   8 duration: 00:16:11
[ifo_dvdnav] title:   9 duration: 00:16:36
[ifo_dvdnav] title:  10 duration: 00:20:32
[ifo_dvdnav] title:  11 duration: 00:15:16
[ifo_dvdnav] title:  12 duration: 00:18:44
[ifo_dvdnav] title:  13 duration: 00:15:29
[ifo_dvdnav] title:  14 duration: 00:26:54
[ifo_dvdnav] title:  15 duration: 03:08:21
[ifo_dvdnav] title:  16 duration: 00:30:04
[ifo_dvdnav] title:  17 duration: 00:09:54
[ifo_dvdnav] title:  18 duration: 00:03:17
[ifo_dvdnav] title:  19 duration: 00:04:32
[ifo_dvdnav] title:  20 duration: 00:04:19
[ifo_dvdnav] title:  21 duration: 00:07:11
[ifo_dvdnav] title:  22 duration: 00:30:04
[ifo_dvdnav] title:  23 duration: 00:00:51
[ifo_dvdnav] Selecting title 1.
[demux] Trying demuxers for level=force.
[ifo_dvdnav] DVDNAV, switched to title: 2
[disc] reset to time: 0.000000
[demux] Trying demuxers for level=force.
[lavf] Found 'mpeg' at score=100 size=0 (forced).
[lavf] avformat_find_stream_info() finished after 3094528 bytes.
[demux] Detected file format: mpeg (libavformat)
[demux] Stream is not seekable.
[demux] Detected file format: CD/DVD/BD wrapper
[cplayer] Opening done: /Volumes/RWBY_4/
mpv(25388,0x70000b8d0000) malloc: Heap corruption detected, free list is damaged at 0x600000319540
*** Incorrect guard value: 268131476935936
mpv(25388,0x70000b8d0000) malloc: *** set a breakpoint in malloc_error_break to debug
Abort trap: 6

Backtrace in the comments

Start by reproducing the DVD path with mpv /Volumes/SomeDVD and inspect the attached backtraces and console log around ifo_dvdnav, libdvdnav, and libdvdread. Compare repeated runs to isolate the heap corruption; done means DVD playback completes without a segfault, abort, or malloc corruption.