Re: kern/53982: unpluging a tty/serial can panic

[Manuel Bouyer <manuel.bouyer%lip6.fr@localhost>]

The following reply was made to PR kern/53982; it has been noted by GNATS.

From: Manuel Bouyer <manuel.bouyer%lip6.fr@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/53982: unpluging a tty/serial can panic
Date: Fri, 15 Feb 2019 11:57:01 +0100

 On Thu, Feb 14, 2019 at 07:50:01PM +0000, Martin Husemann wrote:
 >  I think this is fixed in -current (but I don't recall the exact change).
 
 I get a different panic with -current:
 [ 1108.3787634] ucom0: detached                                        [26/1974]
 [ 1108.3787634] umodem0: detached
 [ 1108.3787634] umodem0: at uhub1 port 1 (addr 2) disconnected
 [ 1108.3787634] panic: kernel diagnostic assertion "maxp != 0" failed: file "/dsk/l1/misc/bouyer/HEAD/clean/src/sys/dev/usb/uhci.c", line 2080
 [ 1108.3787634] cpu0: Begin traceback...
 [ 1108.3787634] vpanic() at netbsd:vpanic+0x143
 [ 1108.3787634] kern_assert() at netbsd:kern_assert+0x48
 [ 1108.3787634] uhci_reset_std_chain() at netbsd:uhci_reset_std_chain+0x582
 [ 1108.3787634] uhci_device_intr_start() at netbsd:uhci_device_intr_start+0xbb
 [ 1108.3787634] usbd_start_next() at netbsd:usbd_start_next+0x226
 [ 1108.3787634] uhci_softintr() at netbsd:uhci_softintr+0x87
 [ 1108.3787634] usb_soft_intr() at netbsd:usb_soft_intr+0x1f
 [ 1108.3887539] softint_thread() at netbsd:softint_thread+0xa4
 [ 1108.3887539] cpu0: End traceback...
 
 -- 
 Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer%lip6.fr@localhost
      NetBSD: 26 ans d'experience feront toujours la difference
 --