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

[David Holland <dholland-bugs%netbsd.org@localhost>]

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

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/53982: unpluging a tty/serial can panic
Date: Sat, 16 Feb 2019 19:43:52 +0000

 not sent to gnats
 (when replying to your own postings it's often necessary to edit To:)
 
    -----
 
 From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
 To: 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: Thu, 14 Feb 2019 20:45:20 +0100
 
 On Thu, Feb 14, 2019 at 07:40:00PM +0000, manuel.bouyer%lip6.fr@localhost wrote:
 > ucom3: detached
 > umodem2: detached
 > umodem2: at uhub6 port 3 (addr 8) disconnected
 > fatal page fault in supervisor mode
 > trap type 6 code 0 rip 0xffffffff80460681 cs 0x8 rflags 0x10202 cr2 0x200000004 
 > ilevel 0x5 rsp 0xffff8000ae306fb0
 > curlwp 0xfffffe821f5fa440 pid 0.6 lowest kstack 0xffff8000ae3042c0
 > panic: trap
 > cpu0: Begin traceback...
 > vpanic() at netbsd:vpanic+0x15d
 > snprintf() at netbsd:snprintf
 > trap() at netbsd:trap+0xa00
 > --- trap (number 6) ---
 > usb_transfer_complete() at netbsd:usb_transfer_complete+0x86
 > ehci_softintr() at netbsd:ehci_softintr+0x159
 > usb_soft_intr() at netbsd:usb_soft_intr+0x38
 > softint_dispatch() at netbsd:softint_dispatch+0x91
 > DDB lost frame for netbsd:Xsoftintr+0x4f, trying 0xffff8000ae3070f0
 > Xsoftintr() at netbsd:Xsoftintr+0x4f
 > --- interrupt ---
 > 0:
 > cpu0: End traceback...
 
 Here's a variant:
 fatal integer divide fault in supervisor mode
 trap type 8 code 0 rip 0xffffffff8063b2cc cs 0x8 rflags 0x10246 cr2 0x77df15b085
 d4 ilevel 0x5 rsp 0xffff8000ae306eb0
 curlwp 0xfffffe821f5fa440 pid 0.6 lowest kstack 0xffff8000ae3042c0
 panic: trap
 cpu0: Begin traceback...
 vpanic() at netbsd:vpanic+0x15d
 snprintf() at netbsd:snprintf
 trap() at netbsd:trap+0xa00
 --- trap (number 8) ---
 ehci_reset_sqtd_chain.isra.1() at netbsd:ehci_reset_sqtd_chain.isra.1+0x210
 ehci_device_intr_start() at netbsd:ehci_device_intr_start+0x84
 usbd_start_next() at netbsd:usbd_start_next+0x90
 ehci_softintr() at netbsd:ehci_softintr+0x159
 usb_soft_intr() at netbsd:usb_soft_intr+0x38
 softint_dispatch() at netbsd:softint_dispatch+0x91
 DDB lost frame for netbsd:Xsoftintr+0x4f, trying 0xffff8000ae3070f0
 Xsoftintr() at netbsd:Xsoftintr+0x4f
 --- interrupt ---
 0:
 cpu0: End traceback...
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --