masayuki2009 commented on pull request #2124: URL: https://github.com/apache/incubator-nuttx/pull/2124#issuecomment-721493333
> > I tried this PR with ubuntu18.04 x86_64, but nuttx crashed when playback
an WAV file via hostfs.
> > Could you tell me what environment are you using?
> > ```
> > Thread 1 "nuttx" received signal SIGSEGV, Segmentation fault.
> > 0x00005555555714a2 in file_vioctl (filep=0x10000000d8, req=4100,
ap=0x7ffff2c8b520) at vfs/fs_ioctl.c:87
> > 87 inode = filep->f_inode;
> > p filep
> > $1 = (struct file *) 0x10000000d8
> > (gdb) p *filep
> > Cannot access memory at address 0x10000000d8
> > (gdb) up
> > #1 0x0000555555571682 in nx_vioctl (fd=4, req=4100, ap=0x7ffff2c8b520)
at vfs/fs_ioctl.c:173
> > 173 ret = file_vioctl(filep, req, ap);
> > (gdb) where
> > #0 0x00005555555714a2 in file_vioctl (filep=0x10000000d8, req=4100,
ap=0x7ffff2c8b520) at vfs/fs_ioctl.c:87
> > #1 0x0000555555571682 in nx_vioctl (fd=4, req=4100, ap=0x7ffff2c8b520)
at vfs/fs_ioctl.c:173
> > #2 0x000055555557197a in ioctl (fd=4, req=4100) at vfs/fs_ioctl.c:259
> > #3 0x000055555558f487 in nxplayer_setvolume (pplayer=0x7ffff2bfa0f0,
volume=400) at nxplayer.c:1226
> > #4 0x000055555558f164 in nxplayer_playthread (pvarg=0x7ffff2bfa0f0) at
nxplayer.c:957
> > #5 0x0000555555583970 in pthread_start () at
pthread/pthread_create.c:192
> > #6 0x0000000000000000 in ?? ()
> > ```
>
> @masayuki2009
>
> Could you show me your nxplayer cmd line ?
>
> mine :
> nsh> mount -t hostfs -o fs=/home/ligd/platform/FFmpeg/st /data
> nsh> nxplayer
> nxplayer> device /dev/audio/pcm0p
> nxplayer> playraw /data/test2.wav 1 16 48000
@GUIDINGLI
The followings are actual sequences.
```
NuttShell (NSH) NuttX-8.2.0
nsh> mount -t hostfs -o fs=/home/ishikawa/nuttx_root /host
mount -t hostfs -o fs=/home/ishikawa/nuttx_root /host
nsh> ls -l /host
ls -l /host
/host:
drwxrwxr-x 4096 ..
-rw-rw-r--34108636 sample1.wav
drwxrwxr-x 4096 .
nsh> ls -l /dev/audio
ls -l /dev/audio
/dev/audio:
crw-rw-rw- 0 pcm0c
crw-rw-rw- 0 pcm0p
nsh> nxplayer
nxplayer
NxPlayer version 1.05
h for commands, q to exit
nxplayer> device /dev/audio/pcm0p
device /dev/audio/pcm0p
nxplayer> playraw /host/sample1.wav 2 16 44100
```
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