On Mon, 01 Feb 2016 11:15:08 +0100, Dmitry Vyukov wrote: > > Hello, > > The following program triggers WARNING in snd_rawmidi_kernel_write1: > > // autogenerated by syzkaller (http://github.com/google/syzkaller) > #include <unistd.h> > #include <sys/types.h> > #include <sys/stat.h> > #include <sys/uio.h> > #include <fcntl.h> > > int main() > { > int fd; > struct iovec iov; > > fd = open("/dev/snd/midiC3D0", O_RDWR); What is the 3rd device? Please show /proc/asound/cards content. > iov.iov_base = ""; > iov.iov_len = 0; > writev(fd, &iov, 1); > return 0; > } > > > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 27775 at sound/core/rawmidi.c:1181 The fix is easy, just remove snd_BUG_ON() like below. thanks, Takashi --- diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index a7759846fbaa..f75d1656272c 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -1178,7 +1178,7 @@ static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, long count1, result; struct snd_rawmidi_runtime *runtime = substream->runtime; - if (snd_BUG_ON(!kernelbuf && !userbuf)) + if (!kernelbuf && !userbuf) return -EINVAL; if (snd_BUG_ON(!runtime->buffer)) return -EINVAL; _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
