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Date:      Wed, 19 Jun 2024 13:47:36 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 279839] panic: bogus vchan_create
Message-ID:  <bug-279839-227-6dQrv8rhUN@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-279839-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-279839-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D279839

--- Comment #2 from Christos Margiolis <christos@freebsd.org> ---
I am trying to reproduce this with my USB soundcard by setting the play vch=
ans
from 1 to 4, but I don't hit the same problem. Apparently you are hitting t=
he
KASSERT in vchan_setnew(). It would be very helpful to see what KASSERT pri=
nts
(i.e what the values of newcnt and vcnt are).

Can you also share your /boot/loader.conf, hw.snd and hw.usb.uaudio?

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